Question

select * from customer intersect 

select * from customer where lower(name) = 'ans' intersect

select * from customer where mobile_num='4777899456'

order by name;

//此查询返回> ORA-00904：“ NAME”：无效的标识符

Answer 1

为什么要为此使用intersect？所有表引用都指向同一个表，因此结果集中的所有行都必须具有相同的列。

我认为这可以满足您的要求

select c.*
from customer c
where lower(name) = 'ans' and
      mobile_num = '4777899456'
order by name;

您可能需要select distinct。

Answer 2

将当前查询用作内联视图，并将ORDER BY应用于封闭的SELECT，例如

  SELECT *
    FROM (-- current query starts here
          SELECT * FROM customer
          INTERSECT
          SELECT * FROM customer WHERE LOWER (name) = 'ans'
          INTERSECT
          SELECT * FROM customer WHERE mobile_num = '4777899456'
          -- current query ends here
         )
ORDER BY name;

我想通过多个使用intersect关键字的查询使用订单

2 个答案: