Re: Connection Help - Stupid Question, sorry to bother.
Chris W wrote: By default MySQL uses port 3306 so you need to be sure that port is open on the server, and not blocked by a firewall. You also need to be sure the user you are trying to login as can login remotely. In the MySQL user data base, there is a column for host which is the host that user can login from. If that host says localhost you can only login from the localhost. If it says % you can login from any host. Also note there can be more than one entry for each user all with a different host. It is best to only set it up so you can login from a specific host, that makes it more difficult for a hacker to break in. If the user you are logging in as is set up just for localhost I would add a user and use the host you plan to login from if you can, other wise just change the host to % then you can login from anywhere. Also if you do an update to the user table, using the sql update command, you also need to execute flush privileges for the changes to take effect. The other thing is that mysql has to be set up to allow remote connections, it's not by default on some systems (eg debian). Check the my.cnf and make sure there is no 'skip-networking'. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Connection Help - Stupid Question, sorry to bother.
Hi, Im sure this is a stupid problem but im a bit confused, and some assistance would be greatly appreciated. Im trying to assist with the maintenance/updating of a php site for a school which uses mysql, and is allready up and running on a remote server. I have the ftp username and password, and i can access the php/html side of things no problems, but i want to connect to the mysql database on the server, and as stupid as it sounds, i have no idea how to go about connecting. Ive used mysql before, not very efficiently, but never have had to set it up, i was always told the program and connection details. I downloaded a mysql program (enginsite MySql client) and tried to connect but am not having any luck and have no idea what the port is supposed to be... the detail i have are: (of course ive undisclosed the username/passwords) DOMAIN ACCOUNT DETAILS Domain Name: www.mhmcindia.org FTP DETAILS Host Name / IP Address: 216.67.234.167 or ftp.mhmcindia.org username: undisclosed password: undisclosed and the PHP connects through the script (on the remote server of course) $host=localhost; $username=undisclosed; $password=undisclosed; $db=undisclosed; $link = mysql_connect($host, $username,$password) or die(Could not connect : . mysql_error()); mysql_select_db($db) or die(Could not select database); Is there anyway i can connect to the mysql database with these details? if so how? Im sorry for asking seemingly obvious questions, but some assistance would be greatly appreciated. Thanks, Sana
Re: Connection Help - Stupid Question, sorry to bother.
By default MySQL uses port 3306 so you need to be sure that port is open on the server, and not blocked by a firewall. You also need to be sure the user you are trying to login as can login remotely. In the MySQL user data base, there is a column for host which is the host that user can login from. If that host says localhost you can only login from the localhost. If it says % you can login from any host. Also note there can be more than one entry for each user all with a different host. It is best to only set it up so you can login from a specific host, that makes it more difficult for a hacker to break in. If the user you are logging in as is set up just for localhost I would add a user and use the host you plan to login from if you can, other wise just change the host to % then you can login from anywhere. Also if you do an update to the user table, using the sql update command, you also need to execute flush privileges for the changes to take effect. Sana Farshidi wrote: Hi, Im sure this is a stupid problem but im a bit confused, and some assistance would be greatly appreciated. Im trying to assist with the maintenance/updating of a php site for a school which uses mysql, and is allready up and running on a remote server. I have the ftp username and password, and i can access the php/html side of things no problems, but i want to connect to the mysql database on the server, and as stupid as it sounds, i have no idea how to go about connecting. Ive used mysql before, not very efficiently, but never have had to set it up, i was always told the program and connection details. I downloaded a mysql program (enginsite MySql client) and tried to connect but am not having any luck and have no idea what the port is supposed to be... the detail i have are: (of course ive undisclosed the username/passwords) DOMAIN ACCOUNT DETAILS Domain Name: www.mhmcindia.org FTP DETAILS Host Name / IP Address: 216.67.234.167 or ftp.mhmcindia.org username: undisclosed password: undisclosed and the PHP connects through the script (on the remote server of course) $host=localhost; $username=undisclosed; $password=undisclosed; $db=undisclosed; $link = mysql_connect($host, $username,$password) or die(Could not connect : . mysql_error()); mysql_select_db($db) or die(Could not select database); Is there anyway i can connect to the mysql database with these details? if so how? Im sorry for asking seemingly obvious questions, but some assistance would be greatly appreciated. Thanks, Sana -- Chris W KE5GIX Gift Giving Made Easy Get the gifts you want give the gifts they want One stop wish list for any gift, from anywhere, for any occasion! http://thewishzone.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Really stupid Question...
I am a Windows User and very used to the Dos Prompt. Can someone please tell me what the Shell Prompt is? What I am asking is the difference between a shell and a dos prompt vis-a-vis mysql. Thank you. Ola
RE: Really stupid Question...
A shell prompt is the Unix/Linux equivalent of the DOS prompt. Since you have the choice of several different operating systems shells to work in (Bourne shell - sh, Korn shell - ksh, C shell - csh, Bourne Again shell - bash (my favorite), etc) the command line prompts are generically referred to as shell prompts. Jack -Original Message- From: Ola Ogunneye [mailto:[EMAIL PROTECTED] Sent: Friday, August 01, 2003 8:28 AM To: [EMAIL PROTECTED] Subject: Really stupid Question... I am a Windows User and very used to the Dos Prompt. Can someone please tell me what the Shell Prompt is? What I am asking is the difference between a shell and a dos prompt vis-a-vis mysql. Thank you. Ola
Re: Really stupid Question...
It's conceptually the same. Both allow you to enter in commands to either execute code in batch or enter program names to be excuted. I'm not sure about Win platforms. But, in the *.nix environments you have a choice of different shells. And, also you can run things in the background and a host of other capabilties. For your purposes, typing in mysql. In theory it should be the same. But, I have not used mysql on a Win platform. Ola Ogunneye wrote: I am a Windows User and very used to the Dos Prompt. Can someone please tell me what the Shell Prompt is? What I am asking is the difference between a shell and a dos prompt vis-a-vis mysql. Thank you. Ola -- Kevin J Citron Sr. Object Imagineer Optimized Objects, Inc. EL Paso, Texas 79930 (915) 565-5777/566-2403 -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
RE: Really stupid Question...
There is absolutely no difference. Shell prompt is used in *nix because of the different shells you can work in but it all comes down to the same thing. Just type what is asked at the DOS prompt and it will work. The only part that won't work is the file in the mysql/scripts directory as they are scripts written to be used in a BASH shell in *nix. The perl programs will work if you have perl installed on you PC. Hope this helps, Scott -Original Message- From: Ola Ogunneye [mailto:[EMAIL PROTECTED] Sent: Friday, August 01, 2003 8:28 AM To: [EMAIL PROTECTED] Subject: Really stupid Question... I am a Windows User and very used to the Dos Prompt. Can someone please tell me what the Shell Prompt is? What I am asking is the difference between a shell and a dos prompt vis-a-vis mysql. Thank you. Ola -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
probably a stupid question
Hey, Here is what I want to do I have 2tables let's say table A and B for simplicity. in table A I have column id and in table B I have column A_id I insert a new value into table A insert into a values(NULL) Since id is auto_incremenet and the primary key it will have an auto value. Now I want that the column A_id contains that id nr. I could query for the biggest id in column A and insert that into B. But are there better way's of doing something like this ? -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
RE: probably a stupid question
Check out LAST_INSERT_ID() in the manual -Original Message- From: Jonas Geiregat [mailto:[EMAIL PROTECTED] Sent: Wednesday, June 18, 2003 12:26 PM To: 'Mysql' Subject: probably a stupid question Hey, Here is what I want to do I have 2tables let's say table A and B for simplicity. in table A I have column id and in table B I have column A_id I insert a new value into table A insert into a values(NULL) Since id is auto_incremenet and the primary key it will have an auto value. Now I want that the column A_id contains that id nr. I could query for the biggest id in column A and insert that into B. But are there better way's of doing something like this ? -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: probably a stupid question
On 18-Jun-2003 Jonas Geiregat wrote: snip I insert a new value into table A insert into a values(NULL) Since id is auto_incremenet and the primary key it will have an auto value. Now I want that the column A_id contains that id nr. I could query for the biggest id in column A and insert that into B. But are there better way's of doing something like this ? INSERT INTO tbl_B (A_id, ...) VALUES (LAST_INSERT_ID(), ...) Regards, -- Don Read [EMAIL PROTECTED] -- It's always darkest before the dawn. So if you are going to steal the neighbor's newspaper, that's the time to do it. (53kr33t w0rdz: sql table query) -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
RE: probably a stupid question
Jonas, After the insert, execute SELECT LAST_INSERT_ID(); This always gives the last auto increment value generated by your database connection. Andy -Original Message- From: Jonas Geiregat [mailto:[EMAIL PROTECTED] Sent: 18 June 2003 19:26 To: 'Mysql' Subject: probably a stupid question Hey, Here is what I want to do I have 2tables let's say table A and B for simplicity. in table A I have column id and in table B I have column A_id I insert a new value into table A insert into a values(NULL) Since id is auto_incremenet and the primary key it will have an auto value. Now I want that the column A_id contains that id nr. I could query for the biggest id in column A and insert that into B. But are there better way's of doing something like this ? -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
RE: stupid question
I am assuming this is not a MySQL question since MySQL interacts with SQL commands that are all in characters. try using strstream. You can poke just about anything into it and get a string out. If you must have a char*, then use the c_str() function of the string class. The best implementation of this I've found is www.boost.org. They have something called lexical_cast that works real cool. It throws exceptions if you feed it garbage. -Original Message- From: adelpfe [mailto:[EMAIL PROTECTED]] Sent: Tuesday, June 11, 2002 8:39 AM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: stupid question do you know any fonction that convert int to char* thantks - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
RE: [PHP] Re: A stupid question...
If you mean select by first letter then wild cards are what you want ... http://www.mysql.com/doc/S/t/String_comparison_functions.html http://www.mysql.com/doc/S/t/String_comparison_functions.html in your case SELECT ... WHERE lastname LIKE '$Letter%' ORDER BY lastname ... if you mean sort all records but don't sort past the first letter then SELECT ..., LEFT(lastname, 1) AS lastname_first ... ORDER BY lastname_first or you might even be able to do ... ORDER BY LEFT(lastname, 1) you'll have to experiment with that one. Tim Ward Internet chess www.chessish.com http://www.chessish.com -- From: Chuck PUP Payne [SMTP:[EMAIL PROTECTED]] Sent: 11 March 2002 02:59 To: Cary; mysql lists.mysql.com Cc: PHP General Subject: Re: [PHP] Re: A stupid question... I want to sort my a letter in a set colomn. Let say I want to sort the colomn last_name http://www.myserver.com/mysort.php?Letter=A Like to create a link like A then sort only the last name ore what ever I want to sort by that letter. I hope that's helps. I can order by, but I can't so a sort like the example above. Chuck Payne Magi Design and Support on 3/10/02 9:42 PM, Cary at [EMAIL PROTECTED] wrote: At 08:24 PM 3/10/02, Chuck \PUP\ Payne wrote: Hi, I not a newie but I am not a pro at mysql either. I want to do a query by letter(a, b, c..ect.). Is there a simple way to do it. I am writing in PHP. So can someone please so me the how. I'm not totally sure what your looking for. If you could elaborate a little I am sure that one of us could help you out. Cary - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
A stupid question...
Hi, I not a newie but I am not a pro at mysql either. I want to do a query by letter(a, b, c..ect.). Is there a simple way to do it. I am writing in PHP. So can someone please so me the how. | Chuck Payne | | Magi Design and Support | | www.magidesign.com | | [EMAIL PROTECTED] | BeOS, Macintosh 68K, Classic, and OS X, Linux Support. Web Design you can afford. Hartley's Second Law: Never sleep with anyone crazier than yourself. - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
Re: A stupid question...
At 08:24 PM 3/10/02, Chuck \PUP\ Payne wrote: Hi, I not a newie but I am not a pro at mysql either. I want to do a query by letter(a, b, c..ect.). Is there a simple way to do it. I am writing in PHP. So can someone please so me the how. I'm not totally sure what your looking for. If you could elaborate a little I am sure that one of us could help you out. Cary - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
Re: [PHP] Re: A stupid question...
I want to sort my a letter in a set colomn. Let say I want to sort the colomn last_name http://www.myserver.com/mysort.php?Letter=A Like to create a link like A then sort only the last name ore what ever I want to sort by that letter. I hope that's helps. I can order by, but I can't so a sort like the example above. Chuck Payne Magi Design and Support on 3/10/02 9:42 PM, Cary at [EMAIL PROTECTED] wrote: At 08:24 PM 3/10/02, Chuck \PUP\ Payne wrote: Hi, I not a newie but I am not a pro at mysql either. I want to do a query by letter(a, b, c..ect.). Is there a simple way to do it. I am writing in PHP. So can someone please so me the how. I'm not totally sure what your looking for. If you could elaborate a little I am sure that one of us could help you out. Cary - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
Re: [PHP] Re: A stupid question...
I want to sort by a letter in a colomn. Let say I want to sort the colomn last_name. I can do order by but I can do just the A's. http://www.myserver.com/mysort.php?Letter=A Like to create a link on a web A then sort only the last name are A. I hope that's helps. I can order by, but I can't so a sort like the example above. Chuck Payne Magi Design and Support on 3/10/02 9:42 PM, Cary at [EMAIL PROTECTED] wrote: At 08:24 PM 3/10/02, Chuck \PUP\ Payne wrote: Hi, I not a newie but I am not a pro at mysql either. I want to do a query by letter(a, b, c..ect.). Is there a simple way to do it. I am writing in PHP. So can someone please so me the how. I'm not totally sure what your looking for. If you could elaborate a little I am sure that one of us could help you out. Cary - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
Re: [PHP] Re: A stupid question...
Chuck Pup Payne wrote: I want to sort by a letter in a colomn. Let say I want to sort the colomn last_name. I can do order by but I can do just the A's. http://www.myserver.com/mysort.php?Letter=A Like to create a link on a web A then sort only the last name are A. I hope that's helps. I can order by, but I can't so a sort like the example above. Chuck Payne Magi Design and Support One of two things to do: When you're inserting the data, figure out the first letter and store that as a separate column (letter perhaps) Second, probably easier to implement in your case with existing data, is to use LIKE. $sql = select * from datatable where last_name like '$letter%'; The % is a wildcard symbol, so if $letter is a then a last name of adams, aames, aston, etc. would all match. I know there's someway to have mysql do a string manipulation to compare just part of a column's data with something, so you could do something similar to a 'substr' in PHP - but it's late and I can't remember off the top of my head. Hope that helps... -- Michael Kimsal http://www.phphelpdesk.com Taking the ? out of ?php 734-480-9961 - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
RE: [PHP] Re: A stupid question...
I would think the easiest way would be to use the string functions of MySQL itself...then you don't have the overhead of the PHP application having to check each row of data (a wise person on this board once answered a question similar to this for me). Somthing like... $query = SELECT * FROM tbl_name WHERE LEFT(last_name, 1) == 'A'); Using a variable passed in... $query = SELECT * FROM tbl_name WHERE LEFT(last_name, 1) == '$letter'); NOTE: LEFT() is a special function, I'd consider it a derivative of SUBSTRING() -Original Message- From: michael kimsal [mailto:[EMAIL PROTECTED]] Sent: Sunday, March 10, 2002 8:17 PM To: Chuck \ Pup\\ Payne Cc: mysql lists.mysql.com Subject: Re: [PHP] Re: A stupid question... Chuck Pup Payne wrote: I want to sort by a letter in a colomn. Let say I want to sort the colomn last_name. I can do order by but I can do just the A's. http://www.myserver.com/mysort.php?Letter=A Like to create a link on a web A then sort only the last name are A. I hope that's helps. I can order by, but I can't so a sort like the example above. Chuck Payne Magi Design and Support One of two things to do: When you're inserting the data, figure out the first letter and store that as a separate column (letter perhaps) Second, probably easier to implement in your case with existing data, is to use LIKE. $sql = select * from datatable where last_name like '$letter%'; The % is a wildcard symbol, so if $letter is a then a last name of adams, aames, aston, etc. would all match. I know there's someway to have mysql do a string manipulation to compare just part of a column's data with something, so you could do something similar to a 'substr' in PHP - but it's late and I can't remember off the top of my head. Hope that helps... -- Michael Kimsal http://www.phphelpdesk.com Taking the ? out of ?php 734-480-9961 - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
RE: [PHP] Re: A stupid question...
You haven't given anyone any specifics... nor a link to a phps, so I
cannot be any more specific with my advice
You could probably get away with looking through each of the elements in
the array and using something like
if ( substr($element, 0, 1) == $letter ( {
Stuff();
}
at least that's how I would go about it if I wanted a quick fix...
$.002 given ;)
cheers
-Original Message-
From: Chuck PUP Payne [mailto:[EMAIL PROTECTED]]
Sent: Sunday, March 10, 2002 7:04 PM
To: Chuck PUP Payne; Cary; mysql lists.mysql.com
Cc: PHP General
Subject: Re: [PHP] Re: A stupid question...
I want to sort by a letter in a colomn. Let say I want to sort the
colomn
last_name. I can do order by but I can do just the A's.
http://www.myserver.com/mysort.php?Letter=A
Like to create a link on a web A then sort only the last name are A.
I hope that's helps. I can order by, but I can't so a sort like the
example
above.
Chuck Payne
Magi Design and Support
on 3/10/02 9:42 PM, Cary at [EMAIL PROTECTED] wrote:
At 08:24 PM 3/10/02, Chuck \PUP\ Payne wrote:
Hi,
I not a newie but I am not a pro at mysql either. I want to do a
query by
letter(a, b, c..ect.). Is there a simple way to do it. I am writing
in PHP.
So can someone please so me the how.
I'm not totally sure what your looking for. If you could elaborate a
little
I am sure that one of us could help you out.
Cary
--
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Re: [PHP] Re: A stupid question...
G'day Daren $query = SELECT * FROM tbl_name WHERE LEFT(last_name, 1) == '$letter'); NOTE: LEFT() is a special function, I'd consider it a derivative of SUBSTRING() Does MySQL have a function that can selectively return words from a column? What I'm looking for is the equivalent of rightwords(text,1) which would return the rightmost word from text. I'm trying to extract the lastname only from a column which holds the full name (the data is coming from another database where the first and last names are combined). Alternatively, is there a way to parse the names during a LOAD? cheers Kim Sql, query - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
Re: probably a stupid question but...
Use an index If you mean use a primary key to create a unique record regardless of the other data in the row, I've already done that. However I'm using that primary key as a means of creating a relationship with another table. What I don't want, is the same category name and customerID twice, even if it does have an index column that differentiates it from other rows. Because, even if there is an index creating a unique row, there is still the possibility of 2 of the same categorynames for one customer. I don't want duplicates like this to be shown to the user. Unless I'm misunderstanding what you mean by using an index... I'm a bit new to mysql, I've worked a lot with Access, and I've actually created a flat file relational database once, but that's it. Here's the table again: ID INT NOT NULL AUTO_INCREMENT PRIMARY KEY, customerID INT UNSIGNED, categoryname VARCHAR(20) With customer ID pointing to a customers table. I've tried this: ID INT NOT NULL AUTO_INCREMENT PRIMARY KEY, customerID INT UNSIGNED, categoryname VARCHAR(20) UNIQUE but I get an error Right now I'm trying to figure out what, and how to use an index for my situation, but I find the mysql docs are badly organized and hard to read. any help is much appreciated! - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
Re: probably a stupid question but...
On 08-Jul-01 Jonah Klimack wrote: What I don't want, is the same category name and customerID twice, even if it does have an index column that differentiates it from other rows. I've tried this: ID INT NOT NULL AUTO_INCREMENT PRIMARY KEY, customerID INT UNSIGNED, categoryname VARCHAR(20) UNIQUE but I get an error Right now I'm trying to figure out what, and how to use an index for my situation, but I find the mysql docs are badly organized and hard to read. Get your duplicates out then: ALTER TABLE da_table ADD UNIQUE KEY idx_catcus (categoryname,customerID); Regards, -- Don Read [EMAIL PROTECTED] -- It's always darkest before the dawn. So if you are going to steal the neighbor's newspaper, that's the time to do it. - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
Re: Perhaps a stupid question about KEY...
HI, Does it make any sense to create an index on the primary key? Ken - Original Message - From: Paul DuBois [EMAIL PROTECTED] To: Fournier Jocelyn [Presence-PC] [EMAIL PROTECTED]; [EMAIL PROTECTED] Sent: Friday, July 06, 2001 3:49 PM Subject: Re: Perhaps a stupid question about KEY... At 12:14 AM +0200 7/7/01, Fournier Jocelyn [Presence-PC] wrote: Hi, Is there any structural difference between a PRIMARY KEY and a UNIQUE key ? Thanks ;) Jocelyn Fournier Presence-PC www.presence-pc.com They're mostly the same, with these differences: There can only be one PRIMARY KEY per table, whereas you can have multiple UNIQUE keys. Any columns in a PRIMARY KEY must be declared NOT NULL; UNIQUE keys do not have this restriction. -- Paul DuBois, [EMAIL PROTECTED] - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
Re: Perhaps a stupid question about KEY...
On Sat, Jul 07, 2001 at 07:22:19AM -0700, Ken Sommers wrote: Does it make any sense to create an index on the primary key? Primary Keys are automatically indexed. In fact, you might say that a primary key is just a special type of index (it is). Jeremy -- Jeremy D. Zawodny, [EMAIL PROTECTED] Technical Yahoo - Yahoo Finance Desk: (408) 349-7878Fax: (408) 349-5454Cell: (408) 439-9951 MySQL 3.23.29: up 21 days, processed 161,614,106 queries (86/sec. avg) - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
probably a stupid question but...
Hi I want to enforce unique records in one of my tables. The table goes like this: ID INT NOT NULL AUTO_INCREMENT PRIMARY KEY, customerID INT UNSIGNED, categoryname VARCHAR(20) With customer ID pointing to a customers table. I suddenly realized that one customer could input the same categoryname twice, which would create a duplicate entry in the database. (if you ignore the primary key). Is there something in MySQL, or in my table design, that can force unique records? Or will I have to check this with my code everytime I update the database? Thanks very much for any help! Much appreciated. - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
Re: probably a stupid question but...
Use an index. -- Jonah Klimack wrote: Hi I want to enforce unique records in one of my tables. The table goes like this: ID INT NOT NULL AUTO_INCREMENT PRIMARY KEY, customerID INT UNSIGNED, categoryname VARCHAR(20) With customer ID pointing to a customers table. I suddenly realized that one customer could input the same categoryname twice, which would create a duplicate entry in the database. (if you ignore the primary key). Is there something in MySQL, or in my table design, that can force unique records? Or will I have to check this with my code everytime I update the database? Thanks very much for any help! Much appreciated. - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php -- Justin Farnsworth Eye Integrated Communications 321 South Evans - Suite 203 Greenville, NC 27858 | Tel: (252) 353-0722 - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
Re: Perhaps a stupid question about KEY...
At 12:14 AM +0200 7/7/01, Fournier Jocelyn [Presence-PC] wrote: Hi, Is there any structural difference between a PRIMARY KEY and a UNIQUE key ? Thanks ;) Jocelyn Fournier Presence-PC www.presence-pc.com They're mostly the same, with these differences: There can only be one PRIMARY KEY per table, whereas you can have multiple UNIQUE keys. Any columns in a PRIMARY KEY must be declared NOT NULL; UNIQUE keys do not have this restriction. -- Paul DuBois, [EMAIL PROTECTED] - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
RE: STUPID QUESTION
In MySQL, you can create tables that have relationships but you can't create what a lot of people call "Foreign Key relationships". In reality you CAN create Foreign key (FK) relationships between tables, you just can't create constraints that enforce them automatically. Example time: Let's say I have 2 tables, person and phone. person personID PK name phoneID FK phone phoneID phoneNumber See the phoneID in the person table? In it we store the value of phone.phoneID for this person's phone number. This is a Foreign key relationship. (So named because we are storing a foreign primary key in our table.) In other implementations of SQL, you could define a constraint (rule) that says that you can't store a value in person.phoneID that does not exist in phone.phoneID. This is a Foreign Key Constraint. So, to answer your question, to create a FK relationship between 2 tables, put a field in table1 of the same type (does not have to be the same name but I always do) as the primary key of table 2. Then when you are selecting and want to gather everything together you use: Select t1.*, t2.* from table1 t1, table2 t2 where t1.t2ID = t2.t2ID Clear as mud? Cal http://www.calevans.com -Original Message- From: GERARDO GALLARDO [mailto:[EMAIL PROTECTED]] Sent: Monday, March 26, 2001 5:57 PM To: [EMAIL PROTECTED] Subject: STUPID QUESTION I'm new to MySQL and SQL in general. I have been searching and searching but I can't find an answer to a question which I know is simple. I have read a book called Teach Yourself MySQL in 21 days. It talkes about defining relationships between tables but it never actually shows you how you would create these relationships or reference data from one table in another table. How do I do this? Please help. Gerardo - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
RE: STUPID QUESTION
Note that foreign keys in SQL are not used to join tables, but are used mostly for checking referential integrity (foreign key constraints). If you want to get results from multiple tables from a SELECT statement, you do this by joining tables: SELECT * from table1,table2 where table1.id = table2.id; or use alias SELECT t1.ID, t2.Name from table1 t1, table2 t2 where t1.id = t2.id ChrisB -Original Message- From: GERARDO GALLARDO [mailto:[EMAIL PROTECTED]] Sent: Monday, March 26, 2001 3:57 PM To: [EMAIL PROTECTED] Subject: STUPID QUESTION I'm new to MySQL and SQL in general. I have been searching and searching but I can't find an answer to a question which I know is simple. I have read a book called Teach Yourself MySQL in 21 days. It talkes about defining relationships between tables but it never actually shows you how you would create these relationships or reference data from one table in another table. How do I do this? Please help. Gerardo - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
Re: STUPID QUESTION
Quite simple, you can't. Please read the manuals more thoroughly. You can't just read a general book on SQL by itself without reading the manual for your particular flavour of SQL. Each type of database may have added extra features or have removed some from the standard SQL. - Original Message - From: "GERARDO GALLARDO" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Tuesday, March 27, 2001 7:56 Subject: STUPID QUESTION I'm new to MySQL and SQL in general. I have been searching and searching but I can't find an answer to a question which I know is simple. I have read a book called Teach Yourself MySQL in 21 days. It talkes about defining relationships between tables but it never actually shows you how you would create these relationships or reference data from one table in another table. How do I do this? Please help. Gerardo - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
