ORACLE获取數据库表的前N条记录

我刚开始修改一个用ORACLE数据库项目时,用SQL  select top 4 from table的方法想取得ORACLE數据库表的前N条记录 ,弄了很久老是出错,后来才知道错了! ORACLE得 用ROWNUM<=N,不能用Top

顺便把网上的其它数据库也记下


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