sql在不同数据库查询前几条数据
1. ORACLE
SELECT * FROM TABLE_NAME WHERE ROWNUM <= N;
HQL: from table_name t order by t.create_time desc where rownum<=n;
2. postgres查询前几条记录SQL
SELECT * FROM TABLE_NAME LIMIT N;
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 TABLE_NAME;
5. SYBASE
SET ROWCOUNT N
GO
SELECT * FROM TABLE_NAME;
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_NAME ORDER BY COLUMN;
8.INFORMIX
SELECT FIRST N * FROM TABLE_NAME;