通过联合使用不同的顺序

Question

我想写一个像这样的查询

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

或者......那样的

    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？

Answer 1

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

来自MSDN:

在使用UNION,EXCEPT或INTERSECT运算符的查询中,只允许在语句末尾使用ORDER BY.此限制仅适用于在顶级查询中而不是在子查询中指定UNION,EXCEPT和INTERSECT的情况.

编辑:强制您需要将顺序应用于ORDER BY外部查询.我为两个查询添加了一个常量值列.