sql语句问题,搜索前5000条数据再过滤

select * from (select top 5000 * from table) where read=1

不知道你是什么数据库，所以就给你写了三种方式：
SqlServer:
select top 5000 * from tab1 where read=1
Oracle:
select * from tab1 where read=1 and rownum<=5000;
MySql:
select * from tab1 where read=1 limit 5000;
在access中和在SqlServer中是一样的，如果你的id是连续的话统统都可以这样写：
select * from tab1 where id<=5000 and read=1
以上，希望对你有所帮助！

oracle
select * from tab1 t where t.id in (
select rownum tab1.id from tab1 order by tab1.id where "Row" < 5000 )
and t.read = 1

sql server
select * from tab1 t where t.id in (
select top(5000) tab1.id from tab1 order by tab1.id )
and t.read = 1

对你表达的前5000条数据有两种理解
（1）符合read=1的前5000条记录
select top 5000 * from TableName
where read=1
（2）id<5000且read=1
select * from TableName
where read=1 and id<50001

select top 5000(read),* from tab1 where read=1 如果你想正序排列，那么就这样就可以，如果倒序的5000那就 加上 gr