查詢單表中多個字段同時重複的數據

SELECT
    *
FROM
	table 
WHERE
	id NOT IN (
	SELECT
		temp.mid 
	FROM
		( SELECT min( id ) AS mid FROM table em GROUP BY em.cid, em.mem_id ) AS temp 
	);
複製代碼

刪除重複數據只保留一條

DELETE 
FROM
	gm_vip_member 
WHERE
	id NOT IN (
	SELECT
		temp.mid 
	FROM
		( SELECT min( id ) AS mid FROM gm_vip_member em GROUP BY em.cid, em.mem_id ) AS temp 
	);
複製代碼