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• 16:48, 11 October 2020 보안기사 talk contribs created page NULLIF (새 문서: * NULLIF(exp1, exp2) * exp1값과 exp2값이 동일하면 NULL을 그렇지 않으면 exp1을 반환 * CASE WHEN expr1 = expr2 THEN NULL ELSE expr1 END 분류:데이터베이스) Tag: Visual edit