T-SQL 删除重复数据SQL

WITH cte AS (
  SELECT roleid,permissionid,
     row_number() OVER(PARTITION BY roleid,permissionid ORDER BY roleid,permissionid) AS [rn]
  FROM rolepermissionrecords
)
DELETE cte WHERE [rn] > 1

T-SQL 删除重复数据SQL,布布扣,bubuko.com

原文：http://www.cnblogs.com/Flyear/p/3586157.html