Question

我有一个表格数据如下：

Customer    Level   Dept
AAA 1   Parent
AAA 2   Corporate
AAA 3   SmallBusiness
BBB 1   Parent
BBB 2   StateLevel
BBB 3   Education
BBB 4   RegionLevel
CCC 1   Parent
CCC 2   Sales
CCC 3   Healthcare
CCC 4   Online
CCC 5   Web

条件：如果Level = 2且Dept = Corporate

用户部门是公司

否则，如果Level = 3且（Dept = Education或Dept = Sport）

用户部门是教育

否则，如果Level = 2且Dept = Sales＆amp;＆amp; Level = 3，Dept = HealthCare

用户部门是HealthCare

DesiredOutput

Customer Department
AAA  Corporate
BBB  Education
CCC  Healthcare

Answer 1

简单的case语句应该这样做...并且我将最后一个逻辑子句更改为OR，因为行不能是级别2和级别3 ...

select distinct
customer,
case 
   when Level=2 and Dept='Corporate' then 'Corporate'
   when Level=3 and (Dept='Education' or Dept='Sport') then 'Education'
   when (Level = 2 and Dept='Sales') or (Level=3 and Dept='Healthcare') then 'Healthcare'
end as 'Department'
from
   SomeTable
where
   Level in (2,3)

Answer 2

另一种选择是通过PIVOT

示例

Declare @YourTable Table ([Customer] varchar(50),[Level] int,[Dept] varchar(50)) Insert Into @YourTable Values ('AAA',1,'Parent') ,('AAA',2,'Corporate') ,('AAA',3,'SmallBusiness') ,('BBB',1,'Parent') ,('BBB',2,'StateLevel') ,('BBB',3,'Education') ,('BBB',4,'RegionLevel') ,('CCC',1,'Parent') ,('CCC',2,'Sales') ,('CCC',3,'Healthcare') ,('CCC',4,'Online') ,('CCC',5,'Web') Select Customer ,Dept = concat( case when [2] in ('Corporate') then 'Corporate' end ,case when [3] in ('Education','Sport') then 'Education' end ,case when [2] in ('Sales') and [3]='Healthcare' then 'Healthcare' end ) From ( Select * From @YourTable Pivot (max([Dept]) For [Level] in ([2],[3]) ) p ) A

<强>返回

Customer Dept AAA Corporate BBB Education CCC Healthcare

Answer 3

您实际上根本没有分组 - 您正在根据现有列的条件创建新列。您想使用CASE语句：

SELECT CASE WHEN Level = 2 AND Dept = 'Corporate' THEN 'Corporate' 
            WHEN Level = 3 AND (Dept = 'Education' OR Dept = 'Sport') THEN 'Education'
            WHEN (Level = 2 AND Dept = 'Sales') OR (Level = 3 AND Dept = 'HealthCare') THEN 'HealthCare'
            ELSE NULL END AS [Department]
FROM [YourTableName]
WHERE (Level = 2 AND Dept = 'Corporate')
OR    (Level = 3 AND (Dept = 'Education' OR Dept = 'Sport'))
OR    (Level = 2 AND Dept = 'Sales') 
OR (Level = 3 AND Dept = 'HealthCare')

相应地调整你的逻辑 - 你的问题格式化的方式很难知道括号应该去哪里 - 而且它们很重要。

编辑：根据@scsimon的建议添加了WHERE条款。

Answer 4

根据这些条款构建内容：

Case
when (level = 2 AND Dept = 'Corporate') Then Corporate
when (level = 3 AND Dept in ('Education','Sport)) Then Education
when (level = 2 AND Dept = 'Sales') Then Healthcare
when (level = 3 AND Dept = 'Healthcare') Then Healthcare
Else Null
End as col

Answer 5

时可以使用案例

   select customer, 
        case when dept = 'Corporate' and level = 2 then 'Corporate'
             when ( dept =  'Education' or dept ='Sport' and level = 2 then 'Education'
             when  (level = 2 and dept ='Sales') and ( level=3 and dept = 'HealthCare' ) then 'HealthCare'
             else 'Unknow' end my_dept
  from table

Answer 6

根据你的逻辑，它就像：

SELECT Customer,
    CASE WHEN Level=2 AND Dept='Corporate' THEN 'Corporate'
         WHEN Level=3 AND (Dept='Education' OR Dept='Sort') THEN 'Education'
         WHEN Level=2 AND (Dept='Sales' AND Level=3) AND Dept='HealthCare'
         END AS [Department] FROM [YourTable]

SQL Group by Data条件过滤

6 个答案: