SQL conditional SELECT

July 21, 2023 by Tarik

In SQL, you do it this way:

SELECT  CASE WHEN @selectField1 = 1 THEN Field1 ELSE NULL END,
        CASE WHEN @selectField2 = 1 THEN Field2 ELSE NULL END
FROM    Table

Relational model does not imply dynamic field count.

Instead, if you are not interested in a field value, you just select a NULL instead and parse it on the client.