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The first solution checks for NULL. The second checks for a magic value that may or may not occur in the data ('false'). Best practice is to avoid magic values.

HABO
– HABO

2018-07-03 17:42:53 +00:00
Commented Jul 3, 2018 at 17:42
@HABO I agree that we should avoid "magic" values at all cost and first approach is preferred. I just wanted to show OP that using ISNULL(@varChar, false) is possible.

Lukasz Szozda
– Lukasz Szozda

2018-07-03 18:54:04 +00:00
Commented Jul 3, 2018 at 18:54

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