拆分列值以匹配是或否

Question

我有两个名为零售和活动的表格，数据如下所示：

零售表

活动表

我主要关注的是零售表格的确定和错误列，因为您可以看到它包含 ActivityId的逗号分隔值。

我想要的是，如果确定列有 ActivityId ，相应的列将是，如果错误列有 ActivityId ，那么它应标记为否

注意我只有四列已修复，这意味着我必须检查其中四列的值是否为确定或错误，如果是，则只有我必须打印是或否，否则为空。

期望的结果应该是： 如果值为Ok，那么是其他明智的否。

Answer 1

我猜你想在某些栏目中存储'是'或'否'。以下是更新该列的查询：

UPDATE RetailTable
 SET <Result_Column>=
  CASE 
  WHEN Ok IS NOT NULL THEN 'Yes'
  WHEN Fault IS NOT NULL THEN 'No'
  END

Answer 2

您可以使用以下代码作为起点：

DECLARE @Retail TABLE
(
PhoneAuditID INT,
HandsetQuoteID INT,
Ok VARCHAR(50)
)
INSERT INTO @Retail VALUES (1, 1009228, '4,22,5')
INSERT INTO @Retail VALUES (2, 1009229, '1')

DECLARE @Activity TABLE
(
ID INT,
Activity VARCHAR(50)
)
INSERT INTO @Activity VALUES (1, 'BatteryOK?'), (4, 'PhonePowersUp?'), (22,'SomeOtherQuestion?'), (5,'LCD works OK?')

SELECT  R.[PhoneAuditID], R.[HandsetQuoteID], A.[Activity], [Ok] = CASE WHEN A.[ID] IS NOT NULL THEN 'Yes' END
FROM    @Retail R
CROSS APPLY dbo.Split(R.Ok, ',') S
LEFT JOIN @Activity A ON S.[items] = A.[ID]

我使用过这里提供的Split功能： separate comma separated values and store in table in sql server

Answer 3

尝试以下查询。我使用pivot将行显示为列。我还使用了分割功能来分割你可以在网上轻松找到的id值：

CREATE TABLE PhoneAudit
(
    PhoneAuditRetailID INT,
    HandsetQuoteID INT,
    Ok VARCHAR(50),
    Fault VARCHAR(50)
)

INSERT INTO PhoneAudit VALUES (1,10090,'1,2','3')

CREATE TABLE ActivityT
(
    ID INT,
    Activity VARCHAR(100)
)

INSERT INTO ActivityT VALUES (1,'Battery')
INSERT INTO ActivityT VALUES (2,'HasCharger')
INSERT INTO ActivityT VALUES (3,'HasMemoryCard')
INSERT INTO ActivityT VALUES (4,'Test')

DECLARE @SQL AS NVARCHAR(MAX)
DECLARE @ColumnName AS NVARCHAR(MAX)
SELECT @ColumnName= ISNULL(@ColumnName + ',','') + QUOTENAME(Activity) FROM (SELECT DISTINCT Activity FROM ActivityT) AS Activities

SET @SQL = 'SELECT PhoneAuditRetailID, HandsetQuoteID,
  ' + @ColumnName + '
FROM
(SELECT
    t1.PhoneAuditRetailID,
    t1.HandsetQuoteID,
    TEMPOK.*
FROM
    PhoneAudit t1
CROSS APPLY
(
    SELECT
        Activity,
        (CASE WHEN ID IN (SELECT * FROM dbo.SplitIDs(t1.Ok,'','')) 
        THEN ''YES'' 
        ELSE ''NO''
        END) AS VALUE
    FROM
        ActivityT t2
) AS TEMPOK) AS t3
PIVOT
(
    MIN(VALUE)
    FOR Activity IN ('+ @ColumnName + ')
) AS PivotTable;'

EXEC sp_executesql @SQL

DROP TABLE PhoneAudit
DROP TABLE ActivityT

Answer 4

有几种方法可以做到这一点。如果您正在寻找一种纯粹的声明式方法，您可以使用递归CTE。下面的示例作为通用解决方案提供，其中包含的测试数据应该能够满足您的需求：

Declare @Delimiter As Varchar(2)

Set @Delimiter = ','

Declare @Strings As Table
(
    String Varchar(50)
)

Insert Into @Strings
Values
    ('12,345,6,78,9'),
    (Null),
    (''),
    ('123')

;With String_Columns As
(
    Select
       String,
       Case
          When String Is Null Then ''
          When CharIndex(@Delimiter,String,0) = 0 Then ''
          When Len(String) = 0 Then ''
          Else Left(String,CharIndex(@Delimiter,String,0)-1)
       End As String_Column,
       Case
          When String Is Null Then ''
          When CharIndex(@Delimiter,String,0) = 0 Then ''
          When Len(String) = 0 Then ''
          When Len(Left(String,CharIndex(@Delimiter,String,0)-1)) = 0 Then ''
          Else Right(String,Len(String)-Len(Left(String,CharIndex(@Delimiter,String,0)-1))-1)
       End As Remainder,
       1 As String_Column_Number
    From
       @Strings
    Union All
    Select
       String,
       Case
          When CharIndex(@Delimiter,Remainder,0) = 0 Then Remainder
          Else Left(Remainder,CharIndex(@Delimiter,Remainder,0)-1)
       End As Remainder,
       Case
          When CharIndex(@Delimiter,Remainder,0) = 0 Then ''
          When Len(Left(Remainder,CharIndex(@Delimiter,Remainder,0)-1)) = 0 Then ''
          Else Right(Remainder,Len(Remainder)-Len(Left(Remainder,CharIndex(@Delimiter,Remainder,0)-1))-1)
       End As Remainder,
       String_Column_Number + 1
    From
       String_Columns
    Where
       (Remainder Is Not Null And Len(Remainder) > 1)
)
Select
    String,
    String_Column,
    String_Column_Number
From
    String_Columns