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Mar 28, 2021 Replied to a topic by pppguest3962 › MySQL › 请教一条 MYSQL 语句，根据 SELECT 有无数据，进行 INSERT，或者是什么都不做... |
语法错了？ INSERT INTO casecheck (flag) SELECT '2' WHERE NOT EXISTS (SELECT `caseid` FROM caseresult WHERE `caseid`='1897');
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