ISNULL
Syntax
ISNULL(expr)
Description
If expr is NULL, ISNULL() returns 1, otherwise it returns 0.
See also NULL Values in MariaDB.
Examples
SELECT ISNULL(1+1); +-------------+ | ISNULL(1+1) | +-------------+ | 0 | +-------------+ SELECT ISNULL(1/0); +-------------+ | ISNULL(1/0) | +-------------+ | 1 | +-------------+
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