单列重复
SELECT
检查字段,
COUNT(检查字段)
FROM
table_name
GROUP BY 检查字段
HAVING COUNT(检查字段) > 1;
多列同时重复
SELECT
检查字段1, COUNT(检查字段1),
检查字段2, COUNT(检查字段2),
...
FROM
table_name
GROUP BY
检查字段1,
检查字段2, ...
HAVING
(COUNT(检查字段1) > 1) AND
(COUNT(检查字段2) > 1) AND
...
未经允许不得转载:高腾蛟 » MySQL查重(单列重复或多列同时重复)
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