如在ms sqlserver 用此语句：select top 2 * from test01
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就会只显示前2条记录，MYSQL
select * from your_table where .... limit 2;//使用limit就可以了.
Oracle的语句:
select * from (select rownum r ,* from test) ttwhere tt.r > 50 and tt.r <= 100;
(最好用PLSQL游标来解决)
DB2中：
select * from payment fetch first 5 row only --查前5条记录