不同数据库中查询前几条记录的用法(SQL Server/Oracle/Postgresql)

SQL在不同数据库中查询前几条记录的用法分类

1. orACLE
Select * FROM TABLE1 Where ROWNUM<=N

2. INFORMIX
Select FIRST N * FROM TABLE1

3. DB2
Select * ROW_NUMBER() OVER(ORDER BY COL1 DESC) AS ROWNUM Where ROWNUM<=N
或者
Select COLUMN FROM TABLE FETCH FIRST N ROWS ONLY

4. SQL SERVER
Select TOP N * FROM TABLE1

5. SYBASE
SET ROWCOUNT N
GO
Select * FROM TABLE1

6. MYSQL
Select * FROM TABLE1 LIMIT N

7. FOXPRO
Select * TOP N FROM TABLE orDER BY COLUMN

8.postgres查询前几条记录SQL
Select * FROM TABLE LIMIT  n

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如在ms sqlserver 用此语句：
select top 2 * from test01 就会只显示前2条记录，

MYSQL/PostgreSQL
select * from your_table where .... limit 2;
//使用limit就可以了.

Oracle的语句:
select * from (select rownum r ,* from test) tt
where tt.r > 50 and tt.r <= 100; (最好用PLSQL游标来解决)

DB2中：
select * from payment fetch first 5 row only --查前5条记录