sql 按照值拍排序進行加序號問題：RANK()、DENSE_RANK()以及ROW_NUMBER()

原創 lscyo 2020-06-27 11:00

數據庫查詢，很對數據進行分組，排序加序號

RANK()、DENSE_RANK()以及ROW_NUMBER()這三個函數都是對分過組的數據排序加序號，這三個函數又各自有區別 

ROW_NUMBER()是無論值是否相同都排序；是沒有重複值的排序(即使兩條記錄相同，序號也不重複的，不會有同序號。

 DENSE_RANK()是遇到相同的值就以相同的序號，當再次遇到不同的值序號排名繼續加

 是連續的排序，兩個第1名仍然跟着第2名 

 

 RANK() 是跳躍排序，兩個第1名下來就是第3名

最後借用一張圖

 

發表評論
所有評論
還沒有人評論，想成為第一個評論的人麼? 請在上方評論欄輸入並且點擊發布.
相關文章

Oracle 大佬離職，怒噴 MySQL “糟糕的數據庫”

{"type":"doc","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"typ

辛晓亮 2021-12-07 19:58:57

支撐 40億數據總量、分鐘級報表：中通大數據平臺在大促中的進化

{"type":"doc","content":[{"type":"blockquote","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null

PingCAP技术团队 2021-11-21 20:13:57

全網播放超 5億的秒級實時臺網互動是如何實現的？

{"type":"doc","content":[{"type":"blockquote","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null

PingCAP技术团队 2021-11-15 15:03:49

30天完成數據庫替換、頂住10倍大促流量壓力，易車是如何做到的？

{"type":"doc","content":[{"type":"blockquote","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null

PingCAP技术团队 2021-11-10 14:08:50

突破極限，京東雲數據庫打造急速秒殺體驗

{"type":"doc","content":[{"type":"blockquote","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null

PingCAP技术团队 2021-11-08 15:18:58

耗時18個月，我們構建了一個真正可擴展的無服務器 SQL 數據庫

{"type":"doc","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"typ

Andy Kimball 2021-11-06 09:03:57

可編程的SQL是什麼樣的？

{"type":"doc","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"typ

祝威廉 2021-10-27 16:23:50

齊聚魔都｜Kylin x MLSQL Meetup 報名開啓

{"type":"doc","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"typ

Kyligence 2021-10-22 15:33:55

數據庫測試的基礎要素

{"type":"doc","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"typ

Jonathan Allen 2021-10-22 15:33:55

PostgreSQL 的審計和權限控制系統

{"type":"doc","content":[{"type":"heading","attrs":{"align":null,"level":4},"content":[{"type":"text","text":"背景介紹","att

GrowingIO技术专栏 2021-06-11 10:43:50

如何將 Schemaless 演化成分佈式 SQL 數據庫

{"type":"doc","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"typ

Uber Engineering 2021-04-22 10:58:51

基於Impala的網易有數BI查詢優化總結

{"type":"doc","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"typ

温正湖 2021-03-22 18:35:36

假如編程語言是《權力的遊戲》中的角色（下）

{"type":"doc","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"typ

Sajid Lhessani 2021-03-22 18:35:23

50年長盛不衰，SQL爲什麼如此成功？

{"type":"doc","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"typ

Felix Schildorfer 2021-03-22 18:35:16

如何使用Kafka、MongoDB和Maxwell’s Daemon構建SQL數據庫的審計系統

{"type":"doc","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"typ

Vishal Sinha 2021-03-22 18:34:45