SQL CASE 语句有问题

Question

我正在尝试调整以下语句：

    SELECT CASE WHEN OrganizationLevel < 2 THEN UPPER(JobTitle)
                    ELSE JobTitle END as 'Job Title', COUNT(BusinessEntityID) as 'number of employees'
    FROM HumanResources.Employee
    WHERE OrganizationLevel < 3 
    GROUP BY JobTitle, OrganizationLevel
    ORDER BY JobTitle ASC

我需要更改它，以便在 OrganisationLevel 为 1 时使 JobTitle 显示为 'SOMETHING ELSE'。

我认为这很简单，只需对 CASE 语句进行一些小的更改，这样 JobTitle 就会是 = 'SOMETHING ELSE'，但它不允许我这样做，

Answer 1

   SELECT CASE WHEN OrganizationLevel < 2 THEN UPPER(JobTitle)
                    ELSE WHEN  OrganizationLevel =1 THEN 'SOMETHING ELSE' ELSE JobTitle END as 'Job Title', COUNT(BusinessEntityID) as 'number of employees'
    FROM HumanResources.Employee
    WHERE OrganizationLevel < 3 
    GROUP BY JobTitle, OrganizationLevel
    ORDER BY JobTitle ASC

Answer 2

您需要在 Group by

中有相同的 case 语句

SELECT CASE
         WHEN OrganizationLevel = 1 THEN 'SOMETHING_ELSE'
         WHEN OrganizationLevel < 2 THEN Upper(JobTitle)
         ELSE JobTitle
       END                     AS 'Job Title',
       Count(BusinessEntityID) AS 'number of employees'
FROM   HumanResources.Employee
WHERE  OrganizationLevel < 3
GROUP  BY JobTitle,
          CASE
            WHEN OrganizationLevel = 1 THEN 'SOMETHING_ELSE'
            WHEN OrganizationLevel < 2 THEN Upper(JobTitle)
            ELSE JobTitle
          END
ORDER  BY JobTitle ASC

SQL CASE 语句有问题

SQL issue with CASE statement

sql

sql-server

sql-server-2012-express