取表的前N條記錄

关于ROW_NUMBER() OVER()的用法！

取表的前N條記錄
介紹取一表前N筆記錄的各种數据庫的寫法...
1. ORACLE
SELECT * FROM TABLE1 WHERE ROWNUM<=N
2. INFORMIX
SELECT FIRST N * FROM TABLE1
3. DB2 ★在ORACLE 中也能执行
SELECT *  from (select * ROW_NUMBER() OVER(ORDER BY COL1 DESC) AS ROWNUM ) a WHERE ROWNUM<=N
DB2
SELECT COLUMN FROM TABLE FETCH FIRST N ROWS ONLY
4. SQL SERVER
SELECT TOP N * FROM TABLE1
5. SYBASE
SELECT TOP N * FROM TABLE1
6. mysql:
select * from table_name limit N