Question

我试图调整以下声明：

    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

我需要对其进行更改，以使JobTitle显示为＆＃39; SOMETHING ELSE＆＃39;当OrganisationLevel为1时。

我认为这对CASE声明进行一些小改动是一件简单的事情，因此JobTitle将会出现这样的情况：＆＃39; SOMETHING ELSE＆＃39;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case

中使用相同的Group by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

CASE语句的SQL问题

2 个答案: