sql 查重以及删除重复

查重

select count(1),content from t_mall_longping
group by content
having count(1)>1

稳重删除重复（技术来源于 百度文心一言，好屌呀）

CREATE TABLE tmp_duplicates (  
  hxid INT PRIMARY KEY  
);


INSERT INTO tmp_duplicates  
SELECT MIN(hxid)  
FROM t_mall_longping  
GROUP BY content; -- 将这里替换为您要检查重复的列名


DELETE FROM t_mall_longping  
WHERE hxid NOT IN (SELECT hxid FROM tmp_duplicates);


DROP TABLE tmp_duplicates;