选择查询问题MYSQL

Question

此查询正在获取1000条记录：

select * from xyz where abc=3 and qwe in (employee_ids)

此查询获取1408作为计数：

select count(*) from xyz where abc=3 and qwe  in (employee_ids)

select * from xyz where abc=3 and qwe in (employee_ids) -- 1000
select count(*) from xyz where abc=3 and qwe  in (employee_ids) -- 1408