在select - case语句中排序

Question

是否有一种方法仅在单个列的select case语句中进行排序？让我们只能说在城市上升的顺序。

SELECT 
StudentLocation = 
CASE 
    WHEN @IsRegistered IS NOT NULL AND @IsInClass IS NOT NULL THEN s.InClassLocation 
    WHEN @IsRegistered IS NOT NULL AND @IsInClass IS NULL THEN s.OnlineLocation 
    ELSE s.City + ', ' + s.State 
END 

Answer 1

你忽略了你的问题的表和/ where子句，但假设s是一个别名你查询的表，你可以使用顺序相同的方式，你总是做到这一点：

SELECT 
StudentLocation = 
CASE 
    WHEN @IsRegistered IS NOT NULL AND @IsInClass IS NOT NULL THEN s.InClassLocation 
    WHEN @IsRegistered IS NOT NULL AND @IsInClass IS NULL THEN s.OnlineLocation 
    ELSE s.City + ', ' + s.State 
END 
FROM someTable as s 
ORDER BY s.City ASC; 

更正市