MySQL数据库去重
MySQL数据库去重
DELETE FROM table
WHERE
去重字段名 IN (
SELECT x FROM
(
SELECT 去重字段名 AS x
FROM table
GROUP BY 去重字段名
HAVING COUNT(去重字段名) > 1
) tmp0
)
AND
递增主键名 NOT IN (
SELECT y FROM
(
SELECT min(递增主键名) AS y
FROM table
GROUP BY 去重字段名
HAVING COUNT(去重字段名) > 1
) tmp1
)
