mysql原生SQL查询异常出现错误“ Every derived table must have its own alias”

select count(*) from ( " + hsql + " ) 

 移植了部分从oracle查询语句过来，结果所有分页查询都有问题，经检查原来是MYSQL 需要在表后面增加别名的规则限制；

调整正常，其代码为：

select count(*) from ( " + hsql + " ) as atab