一尘不染

通过联合使用不同的顺序

sql

我想写一个查询

    select top 10 * from A
    order by price
    union
    select top 3 * from A 
    order by price

或诸如此类

    select top 10 * from A
    where name like '%smt%'
    order by price
    union
    select top 3 * from A
    where name not like '%smt%'
    order by price

你能帮我么?


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2021-03-10

共1个答案

一尘不染

这应该工作:

SELECT * 
FROM (SELECT TOP 10 A.*, 0 AS Ordinal
      FROM A
      ORDER BY [Price]) AS A1

UNION ALL

SELECT * 
FROM (SELECT TOP 3 A.*, 1 AS Ordinal
      FROM A
      ORDER BY [Name]) AS A2

ORDER BY Ordinal

MSDN

在使用UNION,EXCEPT或INTERSECT运算符的查询中,仅在语句末尾才允许使用ORDER BY。仅当您在顶级查询中 而不是子查询中
指定UNION,EXCEPT和INTERSECT时,此限制才适用。

编辑 :强制您需要将顺序应用于ORDER BY外部查询的顺序。我已经向两个查询添加了一个常量值列。

2021-03-10