MySQL WHERE: how to write “!=” or “not equals”?

Question

I need to do this

DELETE FROM konta WHERE taken != \'\'

But != doesn\'t exist in mysql. Anyone know how to do this?

Answer 1

You may be using old version of Mysql but surely you can use

 DELETE FROM konta WHERE taken <> ''

But there are many other options available. You can try the following ones

DELETE * from konta WHERE strcmp(taken, '') <> 0;

DELETE * from konta where NOT (taken = '');