SQL Server:查询以透视并显示未设置的值

我有一个SQL Server表，有3列：

UserID、SettingID、SettingValue

范例

UserID | SettingID | Value
1      | 10        |0
1      | 11        |1
1      | 14        |0
2      | 10        |1
2      | 13        |1

需要根据设置ID转换为列

可能是没有设置ID的行->想要获取不存在的并显示为“未设置”

预期结果：

UserID | Setting10 | Setting11 | Setting13 | Setting14
1      |  Off      |  On       |  not set  |  off
2      |  On       |  not set  |  on       |  not set

设置ID列表已给出，无需分析和自动查找

---

不知道如何处理这个问题，因为你说设置ID的列表是固定的，你可以通过条件聚合得到想要的结果

select userid,
max(case when settingid = '10' then 
                                   case when value = 0 then 'Off'
                                        when value = 1 then 'On'
                                   else 'not set' end
    end) as setting10,
--proceed similarly for other settings
from yourtable
group by userid;

MS SQL Server 2008架构设置：

DECLARE @Table TABLE (UserID INT,  SettingID INT, Value INT )
INSERT INTO @Table VALUES 
(1      , 10        ,0),
(1      , 11        ,1),
(1      , 14        ,0),
(2      , 10        ,1),
(2      , 13        ,1)

| UserID | Setting10 | Setting11 | Setting13 | Setting14 |
|--------|-----------|-----------|-----------|-----------|
|      1 |       off |        on |   not set |       off |
|      2 |        on |   not set |        on |   not set |

查询1：

SELECT UserID
       ,COALESCE(  Setting10 , 'not set') Setting10 
       ,COALESCE(  Setting11 , 'not set') Setting11 
       ,COALESCE(  Setting13 , 'not set') Setting13
       ,COALESCE(  Setting14 , 'not set') Setting14
FROM (
    SELECT UserID 
         , 'Setting' + CAST(SettingID AS VARCHAR(10)) AS Settings
         ,CASE Value WHEN 0 THEN 'off'
                     WHEN 1 THEN 'on'
                END AS Value
    FROM @Table
    ) t
    PIVOT (MAX(Value)
           FOR Settings
           IN (Setting10 , Setting11 , Setting13 , Setting14)
          )p

：

DECLARE @Table TABLE (UserID INT,  SettingID INT, Value INT )
INSERT INTO @Table VALUES 
(1      , 10        ,0),
(1      , 11        ,1),
(1      , 14        ,0),
(2      , 10        ,1),
(2      , 13        ,1)

| UserID | Setting10 | Setting11 | Setting13 | Setting14 |
|--------|-----------|-----------|-----------|-----------|
|      1 |       off |        on |   not set |       off |
|      2 |        on |   not set |        on |   not set |

---

这是你问题的答案

DECLARE @DynamicPivotQuery AS NVARCHAR(MAX)
DECLARE @ColumnName AS NVARCHAR(MAX)
DECLARE @ColumnCaseName AS NVARCHAR(MAX)

--Get distinct values of the PIVOT Column 
SELECT @ColumnName= ISNULL(@ColumnName + ',','') 
   + QUOTENAME(SettingID)
FROM (SELECT DISTINCT SettingID FROM TableName) AS TableName

SELECT @ColumnCaseName= ISNULL(@ColumnCaseName + ',','') 
   + 'case when '+QUOTENAME(SettingID)+' = 0 then ''Off'' when  '+QUOTENAME(SettingID)+' = 1 then ''On''  else ''not set'' end  '
+ QUOTENAME(SettingID)
FROM (SELECT DISTINCT SettingID FROM TableName) AS TableName

--Prepare the PIVOT query using the dynamic 
SET @DynamicPivotQuery = 
N'SELECT UserID, ' + @ColumnCaseName + '
FROM TableName
PIVOT(Max(Value) 
      FOR SettingID  IN (' + @ColumnName + ')) AS PVTTable'
--Execute the Dynamic Pivot Query
EXEC sp_executesql @DynamicPivotQuery

这将适用于您在表中添加的任意数量的行

快乐编码