mysql删除重复数据保留最新一条数据
DELETE FROM tb
WHERE id not IN (
SELECT max_id FROM (
SELECT max(id) max_id
FROM tb
GROUP BY column_1,column_2,...colums
) temp
)
DELETE FROM tb
WHERE id not IN (
SELECT max_id FROM (
SELECT max(id) max_id
FROM tb
GROUP BY column_1,column_2,...colums
) temp
)