别名POSTGRES选择语句

Question

我想在查询中创建新表,并在最后使用它们进行最终查询.我不记得语法是什么,无法在任何地方找到它.(这里只是一个基本的例子).

phones as 
    (
        SELECT phone_number from customers
    )


emails as 
    (
        SELECT emails from customers
    )

// do something with both

Answer 1

你在找 CTE's

With phones as 
    (
        SELECT phone_number from customers
    )
,emails as 
    (
        SELECT emails from customers
    )
select * from phones--/emails