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Top Forums Programming MYSQL - trigger update on record insert or update Post 302889748 by spacebar on Sunday 23rd of February 2014 04:54:40 PM
Old 02-23-2014
Since mySql doesn't allow "update or insert" syntax you will need to create a 'before insert' and a 'before update' trigger.

Example code:
Code:
create trigger before_insert_concat before insert on table1
for each row set col_comb  =  concat( new.cola,  ' - ',  new.colb,  ', ',  new.colc );

create trigger before_update_concat before update on table1
for each row set new.col_comb  =  concat( new.cola,  ' - ',  new.colb,  ', ',  new.colc );

This User Gave Thanks to spacebar For This Post:
 

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MYSQL(1)						      General Commands Manual							  MYSQL(1)

NAME
mysql - text-based client for mysqld, a SQL-based relational database daemon SYNOPSIS
mysql [-B|--batch] [-#|--debug= logfile] [-T|--debug-info] [-e|--exec= command] [-f|--force] [-?|--help] [-h|--host= hostname] [-n|--unbuffered] [-p[pwd]] [--password=[pwd]] [-P|--port= pnum] [-q|--quick] [-r|--raw] [-s|--silent] [-S|--socket= snum] [-u|--user= uname] [-v|--verbose] [-V|--version] [-w|--wait] DESCRIPTION
The mysql program provides a curses-based interface to the SQL-based database server daemon, mysqld(1). Full fuller documentation, refer to the HTML documents installed with the package. OPTIONS
-B|--batch Print results with a tab as separator, each row on a new line. -#|--debug=logfile Employ the specified debug log. -T|--debug-info Print debug information upon exiting. -e | --exec=command Execute the specified command and quit (--batch is implicit). -f|--force Continue even if the face of a SQL error. -?|--help Display a help message and exit. -h|--host=hostname Connect to the specified host. -n|--unbuffered Flush the buffer after each query. -p|--password[=pwd] Employ the specified password when connecting to the database server. If a password is not supplied, it will be requested interac- tively. -P|--port=pnum Employ the specified port number for connecting to the database server. -q|--quick Do not cache the result; print it row by row. This may slow down the server if the output is suspended. -r|--raw Write fields without conversion. (used with --batch). -s|--silent Silent mode: reduce the amount of output. -S|--socket=snum Employ the specified socket file for connecting to the database server. -u|--user=uname Employ the specified user name for logging in to the server. -v|--verbose Verbose mode: write more Specifying this option twice produces a tabular output format. -V|--version Print the mysql version number and exit. -w|--wait Wait and retry if the database server connection is down. FILES
/depot/bin/mysql executable /depot/bin/mysqld executable /depot/bin/safe_mysqld executable shell script for starting mysqld safely /site/var/mysql/data location of database files EXAMPLE
You can also read a backup dump file back into MySQL with: mysql database < backup-file.sql SEE ALSO
isamchk (1), isamlog (1), mysqlaccess (1), mysqladmin (1), mysqlbug (1), mysqld (1), mysqldump (1), mysqlshow (1), msql2mysql (1), perror (1), replace (1), safe_mysqld (1), which1 (1), zap (1), AUTHOR
Ver 6.3, distribution 3.20.20 Michael (Monty) Widenius (monty@tcx.se), TCX Datakonsult AB (http://www.tcx.se). This software comes with no warranty. Manual page by R. P. C. Rodgers, Lister Hill National Center for Biomedical Communication, U.S. National Library of Medicine (rodgers@nlm.nih.gov). 13 June 1997 MYSQL(1)
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