Mysql – Helge's blog

Machform error: Cardinality violation: 1242 Subquery returns more than 1 row

We have a multiuser Machform PHP application running on a Redhat 7 Linux server with Apache webserver and MariaDB database. In a […]

I have two different Linux servers, and wanted to test if one where faster than the other. I used mysqlslap together with […]

I tried to upgrade Moodle 2.2.1 to 2.6.2+ and got this error message: Default exception handler: DDL sql execution error Debug: Data […]

If you just need a quick way to get some data from a mysql database in your shell (bash), you could do […]

We had a lot of spam users in our multisite wordpress system. This was because we had self-registration enabled for a period. […]

I had to send emails to all the Blog admins in our WordPress Multisite installation. This is how I did it: [code […]