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 


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 

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