在select-case语句中排序

Question

有没有一种方法可以仅通过单列在select case语句中进行排序？ 只能说按城市升序。

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

您没有考虑表和from / where子句的问题，但是假设s是您要查询的表的别名，则可以使用与通常相同的方式使用order：

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;

校正后的城市