要通過(guò)Delete SQL刪除重復(fù)記錄,可以按照以下步驟進(jìn)行操作:
SELECT column1, column2, COUNT(*)
FROM table_name
GROUP BY column1, column2
HAVING COUNT(*) > 1;
WITH CTE AS (
SELECT column1, column2,
ROW_NUMBER() OVER(PARTITION BY column1, column2 ORDER BY column1) AS RN
FROM table_name
)
DELETE FROM CTE
WHERE RN > 1;
需要注意的是,在執(zhí)行刪除操作之前,建議先備份數(shù)據(jù),以免誤操作導(dǎo)致數(shù)據(jù)丟失。