Tricky TSQL: NOT IN (NULL)

We’ve done this before, but we can go one better this time. Let’s take this step by step. NULL means “I don’t know”. It stand for an unknown value. Nothing can be equal to NULL. We simply can’t say that 1 = NULL, or ‘ABBA’ = NULL,  because we don’t know what value NULL might possibly be … Continue reading Tricky TSQL: NOT IN (NULL)→Image may be NSFW.
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