Visit Our UNIX and Linux User Community

Top Forums Programming MYSQL - trigger update on record insert or update Post 302889989 by barrydocks on Monday 24th of February 2014 04:18:54 PM
Old 02-24-2014
Originally Posted by spacebar
Since mySql doesn't allow "update or insert" syntax you will need to create a 'before insert' and a 'before update' trigger.

Example 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 );

Sorry I am a bit confused, does that mean I need to create a table named 'new' with 4 columns, 'col_comb', 'cola', colb', and 'colc'??

Ignore all that, it works - thanks your a star :-)

Last edited by barrydocks; 02-24-2014 at 05:45 PM..
Test Your Knowledge in Computers #445
Difficulty: Easy
Scientific Linux has been loaded onto systems at the International Space Station.
True or False?

8 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

awk script to update header record

I am using HP UX and think this may be done with awk but bot sure. I have a file with a several header records and undeneath many detail records I need to put in the header record the number of detail records above this header record and number of detail records below this header record Header... (5 Replies)
Discussion started by: klut
5 Replies

2. UNIX and Linux Applications

update trigger

hi all, i hope i am posting this /beginner) question in the right forum: i want to create an update trigger, which rolls back a transaction if a record of a table is updated. the table has - amongst others - a field 'statusid' - if a record in this table has the statusid X and it is attempted... (0 Replies)
Discussion started by: kalinkula
0 Replies

3. Shell Programming and Scripting

Update trigger for unix file (solaris)

Hello, from log error file of process that i's updating in append mode, i need to capture the new entries for every day. How i can know and save only the new errors? This it's a sample of error log file (oas report server engine) thanks and regards Fran (2 Replies)
Discussion started by: fran61
2 Replies

4. Shell Programming and Scripting

Insert/Update using sed

Hi, I have a xml file (Config.xml) with following entry <Date="" Node1="50" Groups="20"> Now I want to use sed to insert/update the Date field with the latest date say - 20120711. I can't use a simple replace command becuase the Date field could be blank ("") or sometimes could have value in... (9 Replies)
Discussion started by: vivek_damodaran
9 Replies

5. Programming

MYSQL - trigger to track changes to fields on update

So I have a php web application that allows updating of records. I would like to track the changes of only the fields that have changed. There are plenty of how to's that involve recreating the original row in a separate table with an additional time/date stamp column but I think this is a big... (1 Reply)
Discussion started by: barrydocks
1 Replies

6. UNIX for Dummies Questions & Answers

Mysql: How to update value in 27000 rows?

Hello, some member created 27000 posts in wrong section (lol :D) so i need to edit all his entries to get new section ID. SELECT * FROM `phpbb_topics` WHERE `topic_first_poster_name` LIKE "%ozerway%"; this will select all his topics... the column with forum id is named "forum_id" and... (3 Replies)
Discussion started by: postcd
3 Replies

7. UNIX for Dummies Questions & Answers

How to update DNS record in Solaris 5.10?

Hi I have a DNS server running on Solaris 5.10, I need to update ip address of two urls defined on our dns server how do i do that? and do i need to restart dns/named service after? how do i restart the service? Thanks (4 Replies)
Discussion started by: arocker
4 Replies

8. Shell Programming and Scripting

Insert one table and update another with shellscript

I have a problem with my shell script. I want to insert data from file to table1(empty) and then, compare table1 with table2 and update some fields. The first part is correct, but the second part does not work. The only way it works is if after the first part I truncate table1 and run the script... (1 Reply)
Discussion started by: nika_mill
1 Replies
GRUB-RENDER-LABEL(1)                                               User Commands                                              GRUB-RENDER-LABEL(1)

grub-render-label - generate a .disk_label for Apple Macs. SYNOPSIS
grub-render-label [OPTION...] [OPTIONS] DESCRIPTION
Render Apple .disk_label. -b, --bgcolor=COLOR use COLOR for background -c, --color=COLOR use COLOR for text -f, --font=FILE use FILE as font (PF2). -i, --input=FILE read text from FILE. -o, --output=FILE set output filename. Default is STDOUT -t, --text=STRING set the label to render -v, --verbose print verbose messages. -?, --help give this help list --usage give a short usage message -V, --version print program version Mandatory or optional arguments to long options are also mandatory or optional for any corresponding short options. REPORTING BUGS
Report bugs to <>. SEE ALSO
The full documentation for grub-render-label is maintained as a Texinfo manual. If the info and grub-render-label programs are properly installed at your site, the command info grub-render-label should give you access to the complete manual. grub-render-label (GRUB) 2.02-2ubuntu8.3 July 2018 GRUB-RENDER-LABEL(1)

Featured Tech Videos

All times are GMT -4. The time now is 10:58 PM.
Unix & Linux Forums Content Copyright 1993-2020. All Rights Reserved.
Privacy Policy