My 102 students often asks me why SQL is needed for a Linux sysadm. I give the reason that they might need to install some software eg. a CMS, that requires a SQL database and a SQL user. And they shouldn't just give the MySQL root-password to the developers.
I also tell them that MySQL is much more used than other RDBS on Linux so they should focus on MySQL. Then I teach them how to create a MySQL user, a little bit about grants and how to create an database. I think that a Junior Linux Sysadm. should be able to create a MySQL user and database. However he/she doesn't need to understand group by, subqueries etc. I know that PostgreSQL is much better for programming but for a Junior Level Sysadm. specific MySQL knowledge is important. So move the focus away from the SQL language to more sysadm. task based items eg. create a MySQL user, database, backup/restore etc. /Martin
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