摘要: 1) SELECT s.*,Row_Number() OVER (partition by c_name ORDER BY grade desc) rank FROM score s 2) SELECT s.*,rank() OVER (partition by c_name ORDER BY gr 阅读全文
posted @ 2019-11-18 21:39 测试小乙 阅读(558) 评论(0) 推荐(0) 编辑