本文共 1093 字，大约阅读时间需要 3 分钟。
SQL> create table t(
2 sid number,
3 tid number,
4 name varchar2(20),
5 dept varchar2(30),
6 step number,
7 ttime varchar2(20)
8 );
Table created
Executed in 1.391 seconds
SQL> insert into t select 1,253, 'ABC ', 'MIS ',5, '10:20 ' FROM DUAL
2 UNION ALL SELECT 2,253, 'ABC ', 'MIS ',6, '10:22 ' FROM DUAL
3 UNION ALL SELECT 3,254, 'STD ', 'PE ',5, '10:22 ' FROM DUAL
4 UNION ALL SELECT 4,254, 'STD ', 'PE ',6, '10:30 ' FROM DUAL;
4 rows inserted
Executed in 0.297 seconds
SQL> SELECT * FROM T;
SID TID NAME
DEPT
STEP TTIME
---------- ---------- -------------------- ------------------------------ ---------- --------------------
1 253 ABC
MIS
5 10:20
2 253
ABC MIS
6 10:22
3 254 STD
PE
5 10:22
4 254 STD
PE
6 10:30
Executed in 0.187 seconds
SQL> SELECT SID,TID,NAME,DEPT,STEP,TTIME FROM (
2 SELECT
SID,TID,NAME,DEPT,STEP,TTIME,ROW_NUMBER()OVER(PARTITION BY TID
ORDER BY TTIME DESC) RM
3 FROM T
4 ) A WHERE A.RM = 1;
SID TID NAME
DEPT
STEP TTIME
---------- ---------- -------------------- ------------------------------ ---------- --------------------
2 253 ABC
MIS
6 10:22
4 254
STD PE
6 10:30
转载地址：https://blog.csdn.net/weixin_29306261/article/details/116289991 如侵犯您的版权，请留言回复原文章的地址，我们会给您删除此文章，给您带来不便请您谅解！
发表评论
最新留言
关于作者
