Сравните значения столбцов между двумя таблицами с условными значениями по умолчанию - PullRequest
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Сравните значения столбцов между двумя таблицами с условными значениями по умолчанию

0 голосов
/ 27 марта 2019

У меня есть 2 таблицы, в которых мне нужно сравнить значения столбцов.Сравнение работает хорошо.Однако мне нужно добавить дополнительное условие, чтобы заполнить значение по умолчанию, если столбцы таблицы из исходной или целевой таблицы равны NULL.Однако, только если у меня есть значения в моем столбце по умолчанию.По сути, значения столбца по умолчанию будут служить переопределением для значений таблицы NULL.

Я предоставил сценарий CREATE TABLE, а также у меня уже есть полный код, подготовленный для сравнения столбцов между исходной и целевой таблицами. 

/****** Object:  Table [dbo].[SourceTable]    Script Date: 9/14/2017 7:57:37 PM ******/
SET ANSI_NULLS ON
GO
CREATE TABLE [dbo].SourceTable(
    ProductID [int] NOT NULL,
    [Provider] [int] NOT NULL,
    MaturityDate [datetime] NULL,
    Price [numeric](28, 10) NULL,
    Price2 [numeric](28, 10) NULL,
    [Default] [numeric](28, 10) NULL
)
GO
/****** Object:  Table [dbo].[TargetTable]    Script Date: 9/14/2017 7:57:37 PM ******/
SET ANSI_NULLS ON
GO
CREATE TABLE [dbo].TargetTable(
    ProductID [int] NOT NULL,
    [Provider] [int] NOT NULL,
    MaturityDate [datetime] NULL,
    Price [numeric](28, 10) NULL,
    Price2 [numeric](28, 10) NULL,
    [Default] [numeric](28, 10) NULL
)

-- Populate Source Table
INSERT [dbo].SourceTable (ProductID, [Provider], MaturityDate, Price, Price2, [Default]) VALUES (1, 28, N'2019-01-01', CAST(10 AS Numeric(28, 10)), CAST(0 AS Numeric(28, 10)), CAST(NULL AS Numeric(28, 10)))
INSERT [dbo].SourceTable (ProductID, [Provider], MaturityDate, Price, Price2, [Default]) VALUES (2, 28, N'2019-01-01', CAST(15 AS Numeric(28, 10)), CAST(0 AS Numeric(28, 10)), CAST(NULL AS Numeric(28, 10)))
INSERT [dbo].SourceTable (ProductID, [Provider], MaturityDate, Price, Price2, [Default]) VALUES (3, 28, N'2019-01-01', CAST(5 AS Numeric(28, 10)), CAST(0 AS Numeric(28, 10)), CAST(NULL AS Numeric(28, 10)))
INSERT [dbo].SourceTable (ProductID, [Provider], MaturityDate, Price, Price2, [Default]) VALUES (4, 28, N'2019-01-01', CAST(0 AS Numeric(28, 10)), CAST(0 AS Numeric(28, 10)), CAST(NULL AS Numeric(28, 10)))
INSERT [dbo].SourceTable (ProductID, [Provider], MaturityDate, Price, Price2, [Default]) VALUES (5, 28, N'2019-01-01', CAST(0 AS Numeric(28, 10)), CAST(0 AS Numeric(28, 10)), CAST(NULL AS Numeric(28, 10)))
INSERT [dbo].SourceTable (ProductID, [Provider], MaturityDate, Price, Price2, [Default]) VALUES (6, 28, N'2019-01-01', CAST(0 AS Numeric(28, 10)), CAST(0 AS Numeric(28, 10)), CAST(NULL AS Numeric(28, 10)))
INSERT [dbo].SourceTable (ProductID, [Provider], MaturityDate, Price, Price2, [Default]) VALUES (7, 28, N'2019-01-01', CAST(0 AS Numeric(28, 10)), CAST(0 AS Numeric(28, 10)), CAST(NULL AS Numeric(28, 10)))
INSERT [dbo].SourceTable (ProductID, [Provider], MaturityDate, Price, Price2, [Default]) VALUES (8, 28, N'2019-01-01', CAST(0 AS Numeric(28, 10)), CAST(0 AS Numeric(28, 10)), CAST(NULL AS Numeric(28, 10)))
INSERT [dbo].SourceTable (ProductID, [Provider], MaturityDate, Price, Price2, [Default]) VALUES (9, 28, N'2019-01-01', CAST(1 AS Numeric(28, 10)), CAST(0 AS Numeric(28, 10)), CAST(NULL AS Numeric(28, 10)))
INSERT [dbo].SourceTable (ProductID, [Provider], MaturityDate, Price, Price2, [Default]) VALUES (10, 28, N'2019-01-01', CAST(1 AS Numeric(28, 10)), CAST(0 AS Numeric(28, 10)), CAST(NULL AS Numeric(28, 10)))
GO


-- Populate Target Table
INSERT [dbo].TargetTable (ProductID, [Provider], MaturityDate, Price, Price2, [Default]) VALUES (1, 28, N'2019-01-01', CAST(NULL AS Numeric(28,10)), CAST(NULL AS Numeric(28, 10)), CAST(0 AS Numeric(28, 10)))
INSERT [dbo].TargetTable (ProductID, [Provider], MaturityDate, Price, Price2, [Default]) VALUES (2, 28, N'2019-01-01', CAST(NULL AS Numeric(28,10)), CAST(NULL AS Numeric(28, 10)), CAST(0 AS Numeric(28, 10)))
INSERT [dbo].TargetTable (ProductID, [Provider], MaturityDate, Price, Price2, [Default]) VALUES (3, 28, N'2019-01-01', CAST(NULL AS Numeric(28,10)), CAST(NULL AS Numeric(28, 10)), CAST(0 AS Numeric(28, 10)))
INSERT [dbo].TargetTable (ProductID, [Provider], MaturityDate, Price, Price2, [Default]) VALUES (4, 28, N'2019-01-01', CAST(NULL AS Numeric(28,10)), CAST(NULL AS Numeric(28, 10)), CAST(0 AS Numeric(28, 10)))
INSERT [dbo].TargetTable (ProductID, [Provider], MaturityDate, Price, Price2, [Default]) VALUES (5, 28, N'2019-01-01', CAST(NULL AS Numeric(28,10)), CAST(NULL AS Numeric(28, 10)), CAST(0 AS Numeric(28, 10)))
INSERT [dbo].TargetTable (ProductID, [Provider], MaturityDate, Price, Price2, [Default]) VALUES (6, 28, N'2019-01-01', CAST(NULL AS Numeric(28,10)), CAST(NULL AS Numeric(28, 10)), CAST(0 AS Numeric(28, 10)))
INSERT [dbo].TargetTable (ProductID, [Provider], MaturityDate, Price, Price2, [Default]) VALUES (7, 28, N'2019-01-01', CAST(NULL AS Numeric(28,10)), CAST(NULL AS Numeric(28, 10)), CAST(0 AS Numeric(28, 10)))
INSERT [dbo].TargetTable (ProductID, [Provider], MaturityDate, Price, Price2, [Default]) VALUES (8, 28, N'2019-01-01', CAST(NULL AS Numeric(28,10)), CAST(NULL AS Numeric(28, 10)), CAST(0 AS Numeric(28, 10)))
INSERT [dbo].TargetTable (ProductID, [Provider], MaturityDate, Price, Price2, [Default]) VALUES (9, 28, N'2019-01-01', CAST(NULL AS Numeric(28,10)), CAST(NULL AS Numeric(28, 10)), CAST(0 AS Numeric(28, 10)))
INSERT [dbo].TargetTable (ProductID, [Provider], MaturityDate, Price, Price2, [Default]) VALUES (10, 28, N'2019-01-01', CAST(NULL AS Numeric(28,10)), CAST(NULL AS Numeric(28, 10)), CAST(0 AS Numeric(28, 10)))
GO


    ;with 

    compare_source ([Provider], ProductID, [Default],

    /*** Source columns to compare ***/

                Col1Source, Col2Source

    )

    as (

                  SELECT
                             [Provider]
                            ,ProductID
                            ,Price
                            ,Price2
                            ,[Default]

                  FROM  dbo.SourceTable

    ),

    compare_target ([Provider], ProductID, [Default],

    /*** Target columns to compare ***/

                Col1Target, Col2Target

    )

    as 

        (
                SELECT
                             [Provider]
                            ,ProductID
                            ,Price
                            ,Price2
                            ,[Default]

                  FROM  dbo.TargetTable
        )

            SELECT ProductID

            , Col1Source, Col1Target

            , Col2Source, Col2Target

            , [Provider]

    FROM 
    (
                SELECT 
                          s.ProductID
                        , s.[Provider]
                        , s.Col1Source, s.Col2Source 
                        , t.Col1Target, t.Col2Target

                FROM compare_source s

                left join compare_target t on t.ProductID = s.ProductID

                WHERE not exists

                (
                        SELECT 1 FROM compare_target t WHERE

                        s.ProductID = t.ProductID AND (( Col1Source = Col1Target ) OR ( ISNULL ( Col1Source, Col1Target ) IS NULL )) AND
                        s.ProductID = t.ProductID AND (( Col2Source = Col2Target ) OR ( ISNULL ( Col2Source, Col2Target ) IS NULL )) 

                )

    ) diff


Here are the current results:

ProductID | Col1Source   | Col1Target | Col2Source | Col2Target    | Provider
    1     | 0.0000000000 |   NULL     |   NULL     | 0.0000000000  |    28
    2     | 0.0000000000 |   NULL     |   NULL     | 0.0000000000  |    28
    3     | 0.0000000000 |   NULL     |   NULL     | 0.0000000000  |    28
    4     | 0.0000000000 |   NULL     |   NULL     | 0.0000000000  |    28
    5     | 0.0000000000 |   NULL     |   NULL     | 0.0000000000  |    28
    6     | 0.0000000000 |   NULL     |   NULL     | 0.0000000000  |    28
    7     | 0.0000000000 |   NULL     |   NULL     | 0.0000000000  |    28
    8     | 0.0000000000 |   NULL     |   NULL     | 0.0000000000  |    28
    9     | 0.0000000000 |   NULL     |   NULL     | 0.0000000000  |    28
    10    | 0.0000000000 |   NULL     |   NULL     | 0.0000000000  |    28


Since I have values in my TargetTable Default field (zeroes), I would like to insert these default values (zeroes) in my NULL values in my Target table.  In essence, these Default values server as an "override" to replace all of my NULL values in my tables.  The rule is, if there are values in my Default column, then use these values to replace all of my NULL fields.  This would have the effect of eliminating some of the column value differences between tables. Thus, the expected results after the replacement of the NULLs by the Default field values should give the following result:

ProductID | Col1Source   | Col1Target      | Col2Source | Col2Target    | Provider
    1     | 0.0000000000 |   0.0000000000  |   NULL     | 0.0000000000  |    28
    2     | 0.0000000000 |   0.0000000000  |   NULL     | 0.0000000000  |    28
    3     | 0.0000000000 |   0.0000000000  |   NULL     | 0.0000000000  |    28
    4     | 0.0000000000 |   0.0000000000  |   NULL     | 0.0000000000  |    28
    5     | 0.0000000000 |   0.0000000000  |   NULL     | 0.0000000000  |    28
    6     | 0.0000000000 |   0.0000000000  |   NULL     | 0.0000000000  |    28
    7     | 0.0000000000 |   0.0000000000  |   NULL     | 0.0000000000  |    28
    8     | 0.0000000000 |   0.0000000000  |   NULL     | 0.0000000000  |    28
    9     | 0.0000000000 |   0.0000000000  |   NULL     | 0.0000000000  |    28
    10    | 0.0000000000 |   0.0000000000  |   NULL     | 0.0000000000  |    28

In theory, I no longer want to see my fields which are identical.  Thus, at the end, here is my result of the comparison after the Default values have replaced my NULLs:

ProductID | Col2Source | Col2Target    | Provider
    1     |    NULL     | 0.0000000000  |    28
    2     |    NULL     | 0.0000000000  |    28
    3     |    NULL     | 0.0000000000  |    28
    4     |    NULL     | 0.0000000000  |    28
    5     |    NULL     | 0.0000000000  |    28
    6     |    NULL     | 0.0000000000  |    28
    7     |    NULL     | 0.0000000000  |    28
    8     |    NULL     | 0.0000000000  |    28
    9     |    NULL     | 0.0000000000  |    28
    10    |    NULL     | 0.0000000000  |    28

I'm hoping it's mostly clear.
...