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Developer-C 11.1
3.0
4.0
10.2
10.3
10.4
10.5
10.6
10.7
10.8
10.9
5.5
5.6
5.7
8.0
18
11g Release 2
18c
21c
23c
8.4
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9.4
9.5
9.6
10
11
12
13
14
15
16
3.8
3.16
3.27
3.39
2012
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2.11
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2.6
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Sakila
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AdventureWorks
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AdventureWorks
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CREATE TABLE T( a int, b int, c int ); insert into T values (1,1,100); insert into T values (1,1,200); insert into T values (1,2,300); insert into T values (1,2,400); insert into T values (1,3,500); insert into T values (1,3,600); insert into T values (1,9,null); SELECT * FROM ( SELECT *,DENSE_RANK() OVER(PARTITION BY a ORDER BY b DESC) rn FROM T WHERE c IS NOT NULL ) t1 WHERE rn = 1
a
b
c
rn
1
3
500
1
1
3
600
1