Question

I want to add a where clause to the sql below so that the column called “howmany” only shows results that are greater than 1, but I keep getting an error when i try.

 select monthname(birthdate) as 'Month', Count(*) as howmany
 from tblBday
 group by month(birthdate)
 ;

Answer 1

It’s because you can’t use an alias in a WHERE clause

Also, you can’t do an aggregate function in a WHERE clause

You need something like this

SELECT monthname(birthdate) as Month, Count(*) AS howmany
FROM tblBday
GROUP BY month(birthdate)
HAVING Count(*) > 1
 ;

Here’s a tuto about HAVING