[Koha-devel] SQL Query not equal and NULL

[Fridolin SOMERS]

Hi,

 From :
https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=24379#c1

 > This query does not return rows where login_attempts IS NULL. It will 
return accounts where login_attempts = 0

I only recently understood the behavior or NULL values in SQL queries 
for NOT IN and !=.

Should be advice this in coding guide lines ?
Is there a syntax better than another : col!=value / not(col=value) ?

Best regards 🎃

-- 
Fridolin SOMERS <fridolin.somers at biblibre.com>
Software and system maintainer 🦄
BibLibre, France