Check for equality on a MySQL Float field

Question

I have a Joomla system and I\'m trying to change the search so that it correctly finds floating point values in the database.

So, I have a query that is built at runtime

Answer 1

Usually with these types of questions it's good to provide a small example to replicate your results.

Usually testing for exact float values is a bad idea since floating point precision isn't an exact science. It's much better to use some tolerance.

create table foo1 (col1 float);

insert into foo1 values (2.18);
select * from foo1 where abs(col1-2.18) <= 1e-6