access：
select top (10) * from table1 where 1=1
db2：
select column from table where 1=1 fetch first 10 rows only
mysql：
select * from table1 where 1=1 limit 10
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
在sqlserver里面，如何读取按照某个排序，第5到10这五个记录
select top 6 * from table where id not in(select top 4 id from table)
oracle：
select * from table1 where rownum<=10