How do I return a boolean value from a query during condition evaluation?

Question

I need something like this:

select (len(someLongTextColumn)=0) as isEmpty;

The above doesn\'t work,

any alternatives?

Answer 1

If you cast to bit, then most client code can read it as boolean directly (SQL Server doesn't have a boolean type)

SELECT
    CAST(
        CASE
           WHEN len(someLongTextColumn) = 0 THEN 1 ELSE 0
        END AS bit
        ) as isEmpty;

if you have many in one go, use bit variables like this: Imply bit with constant 1 or 0 in SQL Server