在刚才的基础上。


insert into look values (2,'a',100);
insert into look values (3,'a',100);
insert into look values (4,'a',100);
insert into look values (5,'a',100);
insert into look values (6,'a',100);
insert into look values (7,'a',100);
insert into look values (8,'a',100);
insert into look values (9,'a',100);
insert into look values (10,'a',100);
insert into look values (11,'a',100);
insert into look values (12,'a',100);
insert into look values (13,'a',100);
insert into look values (14,'a',100);
insert into look values (15,'a',100);
insert into look values (16,'a',100);
insert into look values (17,'a',100);
insert into look values (18,'a',100);
insert into look values (19,'a',100);
insert into look values (20,'a',100);


SELECT * FROM look ORDER BY id DESC FETCH FIRST 3 ROWS ONLY;

SQL> SELECT * FROM look ORDER BY id DESC FETCH FIRST 3 ROWS ONLY;


ID NAME   MONEY
---------- ---------- ----------
20 a     100
19 a     100
18 a     100

排名前三的


SQL> SELECT * FROM look  ORDER BY id DESC FETCH FIRST 10 PERCENT ROWS ONLY;

ID NAME   MONEY
---------- ---------- ----------
20 a     100
19 a     100

排名前10%的

SQL> SELECT * FROM look  ORDER BY id DESC OFFSET 5 ROWS FETCH NEXT 5 ROWS ONLY;

ID NAME   MONEY
---------- ---------- ----------
15 a     100
14 a     100
13 a     100
12 a     100
11 a     100
忽略前5条记录并会显示表的下5条记录：

SELECT * FROM look ORDER BY id FETCH FIRST 5 PERCENT ROWS WITH TIES;  

ID NAME   MONEY
---------- ---------- ----------
1 a     100





本文标题：12CSQL-TOP
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