有条件地以大写形式显示值

Question

我有一个非常简单的查询，但我需要这样，如果 Conditional 小于二，那么 Title 应该显示为全部大写

SELECT DISTINCT Title, COUNT(Title) AS NumberOfTitles
FROM Table 
WHERE Conditional < 3
GROUP BY Title
ORDER BY Title

我试过 CASE 等，但似乎可以正常工作

如果条件 = 1

，我还需要将标题设置为 'MAIN'

Answer 1

SELECT 
case when conditional = 1 then 'MAIN'
when conditional <> 1 and conditional < 2 then UPPER(Title)
else Title end as Title
, COUNT(Title) AS NumberOfTitles
FROM Table 
GROUP BY case when conditional = 1 then 'MAIN'
         when conditional <> 1 and conditional < 2 then UPPER(Title)
         else Title end
ORDER BY case when conditional = 1 then 'MAIN'
         when conditional <> 1 and conditional < 2 then UPPER(Title)
         else Title end

您可以使用 case 语句进行尝试。

Answer 2

我会将逻辑包装在一个通用的 table 表达式中，以避免在 group by 和 order by 子句中重复它：

WITH cte AS (
    SELECT 
       CASE WHEN conditional < 2 THEN UPPER(Title)
            ELSE Title 
       END AS Title
    FROM Table 
) 

SELECT Title, COUNT(Title) AS NumberOfTitles
FROM cte
GROUP BY Title
ORDER BY Title;

有条件地以大写形式显示值

Conditionally displaying a value in upper case

sql

tsql

uppercase