How to make a SELECT in PHP/MySQL case insensitive?

Question

Her\'s my probleme, i guess its really basic.

I\'m trying to lookup in the database if a line does exist. heres my code :

$req=\"SELECT * FROM INSTIT         


        

Answer 1

you can use LIKE:

WHERE foo LIKE 'bar'

Or you can cast both lowercase with:

WHERE LOWER(foo) = LOWER("bar")

The example with LOWER() is most effective where you know that all of your data in the database is already lower cased and then you can just execute:

WHERE foo = LOWER("bar")

This would be a cheaper comparison than the LIKE if you can lower case all of the data in your database.