sql在不同数据库查询前几条数据

sql在不同数据库查询前几条数据

 

1. ORACLE 

  SELECT * FROM TABLE1 WHERE ROWNUM<=N 

  HQL: from table1 t order by t.createTime desc where rownum<=n

 

2. INFORMIX 

   SELECT FIRST N * FROM TABLE1

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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

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6. MYSQL 

SELECT * FROM TABLE1 LIMIT N

hibernate查询记录的前10条记录

就像mysql的SQL语句的"select * from table limit 10" hql 不支持limit

query.setFirstResult(0);//从第0条开始取

query.setMaxResults(10);//取十条记录

 

7. FOXPRO 

SELECT * TOP N FROM TABLE ORDER BY COLUMN

8.postgres查询前几条记录SQL 

SELECT * FROM TABLE LIMIT