Deleting records while parsing query results (in Perl DBI)?
Hi,
If I run a mysql query then work through the results of that query one at a
time, deleting the record sometimes eg:
while (my $href = $sth-fetchrow_hashref())
{
if ($href-{'ExpiryDate'} eq '2003-02-22 00:00:00') {
# Do something
# then...
$db-do(DELETE FROM MyTable WHERE ID=$href-{'ID'});
}
else {
# Do something else
}
}
Does the DELETE cause a change in the results of the surrounding $sth
parsing loop?
I know it would be best to do a:
DELETE FROM MyTable WHERE ExpiryDate = whatever
But I need to use the data to do some other stuff, only from those records
that are up for deletion.
Any ideas?
Thanks,
Jeff
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How to query an entire row?
Hello, In a table like this: ID Item1 char(100) Item2 char(100) . . ItemN char(100) What's the cleanest way to do this mysql query: SELECT * FROM MyTable WHERE AnyColumn LIKE '%mysearch%' Only way I can think to do it is: SELECT * FROM MyTable WHERE (Item1 LIKE '%mysearch%' OR Item2 LIKE '%mysearch%' OR ) Many thanks, Jeff - 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: Re: How to query an entire row?
At 13:53 24/02/03 +0100, you wrote: Hello. On Mon 2003-02-24 at 11:28:05 +, [EMAIL PROTECTED] wrote: Hello, In a table like this: ID Item1 char(100) Item2 char(100) . . ItemN char(100) What's the cleanest way to do this mysql query: SELECT * FROM MyTable WHERE AnyColumn LIKE '%mysearch%' Only way I can think to do it is: SELECT * FROM MyTable WHERE (Item1 LIKE '%mysearch%' OR Item2 LIKE '%mysearch%' OR ) Yes, that's it. If you think that's unpretty, you are right. With a normalized design, you usually shouldn't need such a query. In other words, if you find yourself needing to do such queries regularly, you may want to re-evaluate your database design. Can I not do: WHERE CONCAT(Item1,Item2,ItemN) LIKE '%mysearch%' ? Jeff - 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
Query Help
Hi, How can I write a MySQL query to grab single lines of the form: ColumnNames: EnquiryID, Name, Address, Detail1, Detail2, Detail3, Detail4 From two joined tables: Tbl1: Enquiries -- ID Name Address Etc Tb12: Details ID EnquiryID Detail Etc There is an imposed maximum number of details per enquiry (say 4 for this example). Many thanks, Jeff - 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
SET field manipulation
Hi, how can I update a set field such that all table rows get what they had in the set ORed with some other set value. I.E. If I have a field called SetField and rows: SetField A A,B A,B,C B etc How can I do what I'm trying to do with this mysql query? UPDATE MyTable SET SetField = (SetField OR 'D'); Thanks, Jeff - 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
Query Help
Hi, How can I write a MySQL query to grab single lines of the form: ColumnNames: EnquiryID, Name, Address, Detail1, Detail2, Detail3, Detail4 From two joined tables: Tbl1: Enquiries -- ID Name Address Etc Tb12: Details ID EnquiryID Detail Etc There is an imposed maximum number of details per enquiry (say 4 for this example). Many thanks, Jeff - 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
Perl DBI secret command?
Hi, just stumbled across the following piece of code: my $rowcount = $sth-rows(); And I checked it out compared to a count of the fetched rows from an SQL QUERY. AND It matched exactly! BUT, I can't find the command rows() in the DBI documentation. What's the story? Have I unearthed a conspiracy? Jeff - 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
DBI Question?
Hi, if I call: my $record = $sth-fetchrow_hashref(); then: $sth-finish(); How valid is it for me to keep referring to my $record hash pointer? Especially if I use $sth in a subsequent transaction. Thanks, Jeff Snoxell Aetherweb Ltd http://www.aetherweb.co.uk NB. I know I asked this question before but nobody answered and I've tried looking elsewhere but can't find an answer to this anywhere. Thanks. [SPAM FILTER FODDER: MySQL, 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
Perl DBI $sth-fetchrow_hashref() persistence?
Hi, if I call: my $record = $sth-fetchrow_hashref(); then: $sth-finish(); How valid is it for me to keep referring to my $record hash pointer? Thanks, Jeff Snoxell Aetherweb Ltd http://www.aetherweb.co.uk [SPAM FILTER FODDER: MySQL, 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
Help with SQL statement?
Hi, I've got a varchar field in a mysql table that contains 'N' numbers (each a maximum of 4 digits, not zero padded) separated by spaces when more than 1 number is present. eg. field content might be any of the following '' '123 4567 1234 45 3' '3' '3 4 6' I want to select only those records that do not contain a certain number. Problem I have with using LIKE %MyNum% is that obviously this is going to match 3 against 123 which I don't want it to. Is there something I can use like Perl's word boundary pattern match code? My statement so far is: SELECT * FROM MyTable WHERE RefList NOT RLIKE \bMyNum\b # Where \b is a word boundary Many thanks, Jeff - 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
More: What's returned from $sth-execute(); ?
Hi,
I see your point re:
Some code to illustrate:
printf Query: %s\n, $query;
my $sth = $dbh-prepare ($query);
$sth-execute();
# metadata information becomes available at this point ...
printf NUM_OF_FIELDS: %d\n, $sth-{NUM_OF_FIELDS};
print Note: query has no result set\n if $sth-{NUM_OF_FIELDS} == 0;
but what I really want to do is determine at an early stage if I have any
results at all in my result set. Actual reason for this is that I'm doing a
SELECT WHERE query and scanning my entrire DB for a session ID that
matches one read from a cookie. I then want to determine if this is a valid
session id and if not re-direct the user to a page saying unrecongnised
session id or something.
Thanks,
Jeff
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What's the point of SET fields?
Hi, I've setup a mysql table field which is a SET type, but it seems to be completely pointless. I can't see why I should use a SET type rather than a string for the following reasons: 1. I appear to be able to store whatever I want in there. MySQL doesn't enforce the rule that what I stick in there must be items from the set I defined when I defined my field. 2. What I do a SELECT statement the only way I can interrogate records to determine if a certain set value is present is to do a WHERE MySet LIKE '%MySetMember%' which is fairly useless if set items contain other set items in their name (ie if I have set items A,AB,ABC then obviously my LIKE query searching for an A will have issues). Or am I missing something? Thanks, Jeff - 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
What's returned from $sth-execute(); ?
Hi, I've been using the return value of $sth-execute(); (in Perl DBI) to determine if I have a result set. I'm not using the value I get back but am assuming that if it's =1 then I have some results. Is this a safe thing to do with MySQL? And The results do actually seem to be correct for the number of records I get back. Should this be the case? Is it reliable? Thanks, Jeff - 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
When is learning chargeable to a client?
Hi, I suppose this may be slightly off topic and not really relevant to a mysql mailing list, sorry... but... I've spent the last month getting up to speed with MySQL with much help from you guys and Mr DuBois' book. I've done this because an existing client of mine has a system which works with a database engine we developed in house for cheap and cheerful little database applications but their requirements have increased to a point where our little engine is running at max throttle. I proposed that I convert their setup to work with MySQL and said that I would not charge for my time spent learning how to use MySQL. My question is: when developing _any_ software it's almost always a bit of a learning process. I'm always referring to reference manuals etc. etc. whenever I'm developing, even in the languages I'm most familiar with. So where do I draw the line? How can I identify a reasonable point at which it's fair to start logging some hours down to my client? Many thanks, Jeff Snoxell - 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
Using Perl DBI quote() method with NULL values?
Hello,
I've got a mysql table with a lot of fields and I'm using a map statement
to pass each of my values for a new record through the quote system so-as
to have everything nicely wrapped up. Problem is that I can't find any way
of writing a null value to my DB when the value has first passed through
quote().
I've tried:
my $err = $MyDatabase-do('INSERT INTO MyTable VALUES(' .
join(,,map($MyDatabase-quote($_),
0, # REF
0, # PARENT REF
$FormData{'Title'} . . $FormData{'Name'} . ,
$FormData{'Email'} . ,
\N, # -- I REALLY WANT THIS TO BE A NULL VALUE!
etc.,
etc.,
etc.
)) .
')');
Which works fine except the \N isn't entered into my database as a null
value. I've also tried '\N' and '' and .
Any ideas how I can solve this easily?
Thanks,
Jeff
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RE: Help with database Design
I'm designing a delivery program with php and mysql, and I'm having troubles with some tables, my problem is with the recipes, the recipes are divided into two tables one with a recipe id and description the other detailing the ingredients, of each particular recipe, that's where my problem starts because each ingredient is not unique and even it appears in many recipes, and another thing is every time and item is ordered their correspondent recipe ingredients are added , ie. pizza has a code 11, recipe has code 01 then all the ingredients in the recipe table have different ingredient code each, and are related by the recipe code 01, then each separate item must be counted, and added to the ingredients general daily totals, I mean pizza uses 2 tomatoes then the general total will show two tomatoes and each other ingredient. There are also some combined recipes : Pizza with a special sauce, then this item has to query two parts of the same table, say code 12 is Pizza with a combined sauce of mushrooms and milk, and pineapples, so each ingredient must be added to the general total. I need help with the design because I don't want to have database anomalies. -Original Message- From: Ricardo Fitzgerald [mailto:[EMAIL PROTECTED]] Sent: Sunday, December 22, 2002 11:22 AM To: [EMAIL PROTECTED] Subject: Help with database Design create table recipes( rid int not null primary key, rname ) ; create table ingredient( iid int not null, rid int not null, # references recipe.rid ridorder int not null, # order of this ingredient in recipe PRIMARY KEY(iid,rid,ridorder), iname ...) ; Your solution means a repetition of ingredients in the ingredients table. Then, if the unit cost of an ingredient changed you'd have to change every occurance of the ingredient... and where would you store info like the source manufacturer, tel and address etc etc. How about: table meals( m_id primary, m_name, etc etc ) table ingredients( i_id primary, i_name, i_price, etc etc ) table recipes( r_id primary, m_id, #(the meal ident) referencess meals, there will be multiples of these ) OR a really nasty way to do it with 2 tables.. table meals( m_id primary, m_name, m_ingredients, # a comma separated list of ingredient ID's in a text field ) table ingredients( as above ) so then you can read in a list of ingredient id's for each recipe, then 'look up' the ingredients. Jeff Snoxell Aetherweb Ltd - 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: Programmatic MySQL backup in Perl
Hello, I've successfully backed up my database to JeffsDB.sql using mysqldump with the -opt option. When I try to restore it using: mysql -h myhost -u myusername -ppassword JeffsDB JeffsDB.sql I get: ERROR 1065 at line 21: Query was empty Now, line 21 of the SQL file contains: /*!4 ALTER TABLE Dealers DISABLE KEYS */; If I remove all the lines like the one above then something seems to happen but the process terminates moaning about some problem in my SQL statement... it points to a huge (1Mb ish) single line of values which were created by mysqldump and which, hence, _should_ be ok shouldn't they. My questions: 1. Why should I have to remove those comments from the SQL shouldn't it just work? 2. Any ideas as to why, even with the comments removed, my SQL is reported as erroneous? Is it something to do with the very long single line and the fact that my mysql server is remote? Many thanks, again!, Jeff - 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
Best Windows MySQL client?
What's the best MySQL client for windows? I've tried 5 or 10 shareware ones that seem ok but all seem a bit chasty (some more than others). Any recommendations? Thanks, Jeff - 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
Restoring db from mysqldump output problem...
Hello, I've successfully backed up my database to JeffsDB.sql using mysqldump with the -opt option. When I try to restore it using: mysql -h myhost -u myusername -ppassword JeffsDB JeffsDB.sql I get: ERROR 1065 at line 21: Query was empty Now, line 21 of the SQL file contains: /*!4 ALTER TABLE Dealers DISABLE KEYS */; If I remove all the lines like the one above then something seems to happen but the process terminates moaning about some problem in my SQL statement... it points to a huge (1Mb ish) single line of values which were created by mysqldump and which, hence, _should_ be ok shouldn't they. My questions: 1. Why should I have to remove those comments from the SQL shouldn't it just work? 2. Any ideas as to why, even with the comments removed, my SQL is reported as erroneous? Is it something to do with the very long single line and the fact that my mysql server is remote? Many thanks, again!, Jeff - 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
CREATE TABLE issue?
Hi again :)
I found the following mysql stuff in the MySQL manual in a section
explaining how to do relationships.
CREATE TABLE persons (
id SMALLINT UNSIGNED NOT NULL AUTO_INCREMENT,
name CHAR(60) NOT NULL,
PRIMARY KEY (id)
);
CREATE TABLE shirts (
id SMALLINT UNSIGNED NOT NULL AUTO_INCREMENT,
style ENUM('t-shirt', 'polo', 'dress') NOT NULL,
color ENUM('red', 'blue', 'orange', 'white', 'black') NOT NULL,
owner SMALLINT UNSIGNED NOT NULL REFERENCES persons,
PRIMARY KEY (id)
);
What's the point of the REFERENCES persons bit at the end of the
definition of table Shirts? It doesn't seem to do anything.
Jeff
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re: Accessing last_insert_id problem.
I'm working with MySQL 3.23.36 so, according to MySQL, Paul Dubois, New Riders running the query: DELETE FROM my_table_name should reset the auto-increment value... but it doesnt'. What SQL do I use to reset the val. You can't believe anything that book says. The author didn't even include anything about TRUNCATE TABLE my_table_name. Nope. That doesn't do it either! I go: TRUNCATE TABLE my_table then: INSERT INTO my_table SET Name='Jeff' then: SELECT * FROM my_table and lo-and-behold, the 'Ref' primary key auto-update field is 37062, not 1 as I hoped. I am managing to reset it to '1' by using a windows mysql client program but it doesn't show me what SQL it's executing in order to obtain the desired result. Thanks, Jeff - 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: Accessing last_insert_id problem.
At 09:46 19/12/02 -0500, you wrote: Jeff Snoxell wrote: Nope. That doesn't do it either! I go: TRUNCATE TABLE my_table Are you using InnoDB tables? You'll have to do something akin to ALTER TABLE my_table AUTO_INCREMENT=1 ... at least according to Paul ... :) No, I'm using MyISAM I believe. Jeff MySQL, query, SQL - 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
Programmatic MySQL backup in Perl
Hi, is there an easy way to programmatically backup MySQL database tables using Perl? My Perl code will be running on a machine remote to the MySQL server. Ta, Jeff - 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
Accessing last_insert_id problem.
Hi, I'm adding records to a db using the Perl DBI. Subsequent to adding a record I need to know the value of the auto-incrementing 'Ref' field so that I can place a copy of the relavent details into a log file. I could query for the LAST_INSERT_ID but what if another process has added another record in the interim? Is this a job for table locking? Many thanks, Jeff - 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: Accessing last_insert_id problem.
Hi, I've got that sussed now and am happily using the aquired ref to subsequently play with the record etc. One other related problem and I recon I'm sorted How do I reset the auto-increment value? I'm working with MySQL 3.23.36 so, according to MySQL, Paul Dubois, New Riders running the query: DELETE FROM my_table_name should reset it... but it doesnt'. What SQL do I use to reset the val. Ta, Jeff - 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
SELECT and UPDATE at the same time?
Hello again, I'm selecting a group of records from my database. I then loop through the selected records and do some work based on what I find. But what I also want to do as I interrogate each record is update some of its fields with new values... but won't that screw up the outer loop? I mean if I try to execute a query whilst looping around the result set of a former query will I not screw up my result set that I'm looping through? Also, is it possible to update specific fields of certain records within a SELECT query? ie can I do something like this: SELECT * FROM my_table WHERE Age 50 AND UPDATE Status = OLD Ta, Jeff - 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: Re: SELECT and UPDATE at the same time?
SELECT * FROM my_table WHERE Age 50 AND UPDATE Status = OLD No. That's goofy anyway. Why wouldn't you just use a regular UPDATE query? UPDATE mytable Status = OLD WHERE Age 50; Cos I want to do a fairly long-winded process on the records of those who are Age50 and subsequently update all of their records with the Date/Time that the change took place. If I do the long-winded process and _then_ do the UPDATE query as you suggest I'm bound to update records which have been added in the meantime (by other clients, it's a busy database) which I've not yet processed. I could make a list of all primary key values I've processed and then update them... or something equally ugly. I just figured there'd be a cleaner way to do it. I really want to avoid grabbing all the results as my server is not located on my local machine. Oh, I could update all the records where age50 with a known date/time then do my select query to select only those records with that time-stamp, and then do my long-winded processing. Can't help thinking there must be a nicer way to do it. Thanks, Jeff - 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
How to enter data in MySQLCC
Hi, I've installed MySQLCC as a client on Windows 2000, it connects via the net to a linux server running the mysql server and it's working ok to the point where I try to enter data into any cell of my tables other than one expecting a numerical value. I know MySQLCC is only in beta test mode but surely it should be able to accept data entry in non numerical cells? Thanks, Jeff - 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
Inconsistent behavior when populating table?
Hi,
I've written a Perl script to populate my MySQL table. It grabs values from
my old database and uses the following for each to form a comma separated
list of single quoted items...
Each of the @values items is passed through: $value =
$db-quote($original_value) first.
$st = $db-prepare('INSERT INTO Enquiries VALUES (' . join(,,@values) .
')' )
|| print 'could not prepare: ' . $db-errstr;
$st-execute() || print Couldn't execute statement: . $st-errstr;
This works fine for _most_ of the fields but strangely, entire columns are
incorrect sometimes. Especially where I'm sending UCT (10-digit unsigned
ints) values to an unsigned int field. These work OK for some of my
coulmns/fields but not for others.
Any clues as to what I'm doing wrong?
Many thanks,
Jeff
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More locking issues
Hi, I'm new to MySQL. I see you all talking about locking databases etc... but isn't that the point of having a database server? So you don't have to worry about record locks? I'm designing the backend for a popular site where a user's visit will result in multiple read/write operations on a database. Is record locking something I definitely need to do? Thanks, Jeff - 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
Joined Tables Newbie Question
Hi, I've worked with a database system in the past that allows you to setup permanent joins between two tables in a database such that if you select record 1 say on a parent table and then add records to a child table, the child table automatically knows that this record is a sub-record of record 1 in the parent. Thus I can have databases with table structures like: Customers: Orders: OrderedItems Without having to always execute complex SQL queries every time. Can I do anything with MySQL to make it act in the same way? Many thanks, Jeff - 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
