Select column, if blank select from another

Question

How does one detect whether a field is blank (not null) and then select another field if it is?

What I really need is a IsBlank function that works the same as IsNul

Answer 1

EDIT: You can't use IF() in mssql.

Use an IF statement in the SELECT portion of your SQL:

SELECT IF(field1 != '', field1, field2) AS myfield FROM ...