鎬葷粨濡備笅錛?br /> 鎴戝垱寤轟簡涓涓〃錛屾暟鎹涓嬶紝
SQL> select * from test;
A1 A2
---------- ----------
1 3
2 4
3 2
3 5
4 2
鐒跺悗鐢╮ank () over錛?br /> SQL> select a1,a2,rank () over (order by a1) rank from test;
A1 A2 RANK
---------- ---------- ----------
1 3 1
2 4 2
3 2 3
3 5 3
4 2 5
SQL> select a1,a2,rank () over (order by a2) rank from test;
A1 A2 RANK
---------- ---------- ----------
3 2 1
4 2 1
1 3 3
2 4 4
3 5 5
鍘熸潵榪欎釜灝辨槸鐢ㄦ潵鐪嬫帓鍚嶇殑涓滀笢鍟娿?br /> 鎺ヤ笅鏉ョ湅鐪媟ow_number() over錛?br /> SQL> select a1,a2, row_number () over (order by a1) rank from test;
A1 A2 RANK
---------- ---------- ----------
1 3 1
2 4 2
3 2 3
3 5 4
4 2 5
SQL> select a1,a2, row_number () over (order by a2) rank from test;
A1 A2 RANK
---------- ---------- ----------
3 2 1
4 2 2
1 3 3
2 4 4
3 5 5
鍐嶇湅鐪媎ense_rank () over
SQL> select a1,a2, dense_rank () over (order by a1) rank from test;
A1 A2 RANK
---------- ---------- ----------
1 3 1
2 4 2
3 2 3
3 5 3
4 2 4
dense_rank鍦ㄦ湁鍑虹幇鐩稿悓鐨剅ank鍚庯紝rank鐨勫兼槸绱ф帴涓婁竴嬈＄殑rank鍊箋?br /> 鍙互榪欎箞鐞嗚В錛屾垜浠氬父鎰忎箟涓婄殑top N 鐨勫疄鐜板簲璇ラ噰鐢╮ow_number() over 鑰屼笉鏄痳ank () over錛屽洜涓簉ow_number 鏄粰璁板綍鍔犱竴涓簭鍙鋒爣璁幫紝鑰宺ank 鏄浉褰撲簬榪涜鎺掑簭鍚庣殑鎺掑悕錛屼篃灝辨槸濡傛灉鎺掑簭鍒楁槸鐩稿悓鐨勶紝閭ｄ箞浠栦滑鐨勮繑鍥炲間篃鏄浉鍚岀殑錛岃宺ow_number鍒欎笉鍙兘榪斿洖鐩稿悓鍊箋?br /> 鏀懼埌涓璧風(fēng)湅鐪嬪惂錛?br />
SQL>
1
select a1,a2,
2rank () over (order by a1) rank,
3dense_rank () over (order by a1) dense_rank,
4row_number () over (order by a1) row_number
5from test;
A1 A2 RANK DENSE_RANK ROW_NUMBERselect a1,a2,2
rank () over (order by a1) rank,3
dense_rank () over (order by a1) dense_rank,4
row_number () over (order by a1) row_number5
from test;---------- ---------- ---------- ---------- ----------
1 3 1 1 1
2 4 2 2 2
3 2 3 3 3
3 5 3 3 4
4 2 5 4 5
row_number()鍜宺ownum宸笉澶氾紝鍔熻兘鏇村己涓鐐癸紙鍙互鍦ㄥ悇涓垎緇勫唴浠?寮鏃舵帓搴忥級錛?br /> rank()鏄煩璺冩帓搴忥紝鏈変袱涓浜屽悕鏃舵帴涓嬫潵灝辨槸絎洓鍚嶏紙鍚屾牱鏄湪鍚勪釜鍒嗙粍鍐咃級錛?br /> dense_rank()l鏄繛緇帓搴忥紝鏈変袱涓浜屽悕鏃朵粛鐒惰窡鐫絎笁鍚嶃傜浉姣斾箣涓媟ow_number鏄病鏈夐噸澶嶅肩殑錛?br />
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