七種數據庫中Select Top的使用方法
1. Oracle數據庫
SELECT * FROM TABLENAME WHERE ROWNUM <= N
2. Infomix數據庫
SELECT FIRST N * FROM TABLENAME
3. DB2數據庫
SELECT *
FROM (SELECT * ROW_NUMBER() OVER({ORDER BY COL1 DESC}) AS ROWNUM FROM TABLENAME)
WHERE ROWNUM <= N
或者
SELECT COLUMN FROM TABLENAME FETCH FIRST N ROWS ONLY
4. SQL Server數據庫
SELECT TOP N * FROM TABLENAME
5. Sybase數據庫
SET ROWCOUNT N
GO
SELECT * FROM TABLENAME
6. MySQL數據庫
SELECT * FROM TABLENAME LIMIT N
7. FoxPro數據庫
SELECT * TOP N FROM TABLENAME ORDER BY COLUMN