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注意:删除重复数据前,记得备份表!!!
废话不说,直接上代码
table_name | 表格名称 |
---|---|
field | 字段名称(删除删除的重复数据) |
DELETE
FROM table_name
WHERE id in (
#找出重复的数据,并且这个数据的id索引不是最小的
select b.number
from (SELECT bbb.id as number
FROM table_name as bbb
WHERE bbb.field IN (
SELECT field
FROM table_name
GROUP BY field
HAVING count(field) > 1
)
AND bbb.id not IN (
SELECT min(id)
FROM table_name
GROUP BY field
HAVING count(field) > 1
)) as b
)