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SQL中exits语句的详细用法：（举例说明下）
帮忙看看下面的SQL语句有什么问题！
select employee_id,employee_name from wgb_employee
where exits (select * from zhiwu2 where employee_id='0051' )
帮忙看看下面的SQL语句有什么问题！
select employee_id,employee_name from wgb_employee
where exits (select * from zhiwu2 where employee_id='0051' )