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