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NULL vs 0 in SQL — Most Devs Wrong #sqlnull #nullhandling #sqlmistakes #sqltips
NULL is NOT empty. NULL is NOT zero. It's unknown — and that one difference silently breaks your SQL queries every day. In this Short you'll learn the most common NULL handling mistakes in SQL Server: why WHERE col = NULL always returns zero rows, how NULL propagates through arithmetic and string operations, and how to fix it instantly with ...
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