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主流数据库查询前几条记录SQL语句

2010-08-18 11:11 435 查看
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


select to_char(sysdate,'mm') from dual; 查询本月的记录
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