RE: primary key based on unique value for two columns
Hi You are wrong. Just try for example: create table test( pk1 int not null, pk2 int not null, primary key(pk1,pk2) ); Regards Daniel £a e-direct Polska sp. z o.o. WWW: http://www.e-direct.pl E-mail: [EMAIL PROTECTED] 45-072 Opole ul. Reymonta 45 tel. +48 77 44 26 073 fax. +48 77 44 26 074 -Original Message- From: Brendin [mailto:[EMAIL PROTECTED]] Sent: Monday, November 12, 2001 7:37 PM To: [EMAIL PROTECTED] Subject: primary key based on unique value for two columns I would like to have a table that has a primary key defined on a combination of two columns in the table. In other words a unique key based upon the values in two columns. I don't think I am able to do this in mysql. I think you can only have a primary key on one column and not on a combination of columns. If I am wrong please correct me. I am looking for work arounds. I have thought of one. That would be to concatenate the columns and use a field terminator such as a - to separate the values or (columns) in the single column. Then you could use string functions to parse the columns. Ex: For column 1 in concatenated column left( ColumnName, (instr( ColumnName, '-') - 1) ) For column 2 in concatenated column Substr (ColumName, (instr ( ColumnName, '-') + 1) , length(ColumnName)- (instr ( ColumnName, '-') + 1) ) Is there any other way to do this? - 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: how to move db
Hi The safest way to do this is to use mysqldump utility. mysqldump -u [username] -p dbname /path/to/dumpfile and then mysql -u [username] -p dbname /path/to/dumpfile Regards Daniel £a e-direct Polska sp. z o.o. WWW: http://www.e-direct.pl E-mail: [EMAIL PROTECTED] 45-072 Opole ul. Reymonta 45 tel. +48 77 44 26 073 fax. +48 77 44 26 074 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Monday, November 12, 2001 8:57 PM To: [EMAIL PROTECTED] Subject: how to move db I'm switching over to a bigger better faster server. My old server is running version 3.23.22-6 mysql on RH and I need to move all the db's to my new box using 3.23.41 installed on RH7.2. So do I just simply move all of the db directories from /var/lib/mysql from one box to the next or are there other files that I need to copy as well. Thanks for the assist - 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
ODP: MySQL privileges
Hi Just type: mysql -u root Regards -Oryginalna wiadomoæ- Od: COLLINEAU Franck FTRD/DMI/TAM [mailto:[EMAIL PROTECTED]] Wys³ano: 29 padziernika 2001 15:05 Do: '[EMAIL PROTECTED]' Temat: MySQL privileges Hi! I'm working on a Linux Mandrake 8.1 station. I have installed MySQL. I have typed './mysql_install_db' When i type mysql, i have the prompt mysql But when i type create database phpdig i have the error message: ERROR 1044: Access denied for user: '@localhost' to database 'phpdig'. Can anybody help me ? Thanks Franck - 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
ODP: Tree in SQL
Thank you. I was trying too long to do this in SQL. -Oryginalna wiadomoæ- Od: Dan Nelson [mailto:[EMAIL PROTECTED]] Wys³ano: 22 padziernika 2001 23:38 Do: Daniel _a_ DW: Lista MySQL Temat: Re: Tree in SQL In the last episode (Oct 22), Daniel _a_ said: I have a table in database which describes tree structure of article groups. In this table I have: 1. group_id - group identifier 2. parent_group_id - identifier of parent group I need to select history, from top to wanted group. I can't change the database design and ofcourse this is MySQL 3.23 database. Can somebody help me ? You'll have to do multiple selects. Loop: select parent_group_id from table where group_id = :myid :myid = parent_group_id Stop when myid == the ID of the top of the tree. -- Dan Nelson [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
ODP: Can only create 127 records in a table :o(
Hi WHat is your hardware configuration ? I had such problem with Alpha/Linux (RedHat 5.2) Regards Daniel £a e-direct Polska sp. z o.o. WWW: http://www.e-direct.pl E-mail: [EMAIL PROTECTED] 45-072 Opole ul. Reymonta 45 tel. +48 77 44 26 073 fax. +48 77 44 26 074 -Oryginalna wiadomoæ- Od: Mette Møller Madsen [mailto:[EMAIL PROTECTED]] Wys³ano: 15 czerwca 2001 13:46 Do: mysql listserver Temat: Can only create 127 records in a table :o( Hi there! When I try to insert more than 127 rows/records in a table I get this error: ERROR 1062: Duplicate entry '127' for key 1 (the key is an auto incremented primary key) Does anyone know how to store _more_ than 127 rows in a table? My guess is that I need to change to settings of my db, but I cannot find anything in the manual. (I'm running version 3.23.38 which should be a stable one.) best regards, Mette Madsen - 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
