Find centralized, trusted content and collaborate around the technologies you use most.
Teams
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
我有两个复杂的 select 语句,每个语句都返回一个相同类型的值。我试图将它们组合成一个类似于 UNION 的语句,只是不是在一列中返回 2 行,而是返回 2 个不同名称的列,每个列包含一个值。有没有一种简单的方法可以做到这一点?
你总是可以做
SELECT (SELECT the_first_select) AS col1, (SELECT the_second_select) AS col2 FROM DUAL
select (select 'expr1'), (select 'expr2')