取前10条记录的sql语句写法：
1、access：
select top (10) * from table1 where 1=1
2、db2：
select column from table where 1=1 fetch first 10 rows only
3、mysql：
select * from table1 where 1=1 limit 10
4、sql server:
读取前10条：select top (10) * from table1 where 1=1
读取后10条：select top (10) * from table1 order by id desc
5、oracle：
select * from table1 where rownum<=10
