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  1. 6 votes

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    1 comment  ·  SQL Prompt  ·  Admin →
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    DataJanitor commented  · 

    Here's a more interesting example - imagine what it'll look like on a table with a couple hundred columns, or worse, with the maximum of 1,024 columns.

    USE [tempdb]

    DROP TABLE IF EXISTS [test]

    CREATE TABLE [TEST]
    (
    [a_Watch_How_Each_CASE_is_farther_to_the_right] TINYINT NOT NULL PRIMARY KEY
    ,[b] TINYINT NOT NULL
    ,[c] TINYINT NULL
    ,[d] TINYINT
    ,[e] TINYINT
    )

    INSERT INTO [TEST]
    VALUES
    (
    1, 2, 3, 4, 5
    )
    ,(
    2, 3, 4, NULL, 5
    )

    DROP TABLE IF EXISTS [test2]

    CREATE TABLE [TEST2]
    (
    [a_Watch_How_Each_CASE_is_farther_to_the_right] TINYINT NOT NULL PRIMARY KEY
    ,[b] TINYINT NOT NULL
    ,[c] TINYINT NULL
    ,[d] TINYINT
    ,[e] TINYINT
    )

    INSERT INTO [TEST2]
    VALUES
    (
    1, 2, 3, 4, 5
    )
    ,(
    2, 4, 4, 3, 5
    )

    SELECT
    CASE
    WHEN [X].[a_Watch_How_Each_CASE_is_farther_to_the_right] IS NULL THEN 'Y only'
    WHEN [Y].[a_Watch_How_Each_CASE_is_farther_to_the_right] IS NULL THEN 'X only'
    ELSE CASE
    WHEN ([X].[a_Watch_How_Each_CASE_is_farther_to_the_right] <> [Y].[a_Watch_How_Each_CASE_is_farther_to_the_right]) THEN 'a,'
    ELSE ''
    END + CASE
    WHEN ([X].[b] <> [Y].[b]) THEN 'b,'
    ELSE ''
    END + CASE
    WHEN
    (
    ([X].[c] <> [Y].[c])
    OR
    (
    (
    ([X].[c] IS NULL)
    AND ([Y].[c] IS NOT NULL)
    )
    OR
    (
    ([X].[c] IS NOT NULL)
    AND ([Y].[c] IS NULL)
    )
    )
    ) THEN 'c,'
    ELSE ''
    END + CASE
    WHEN
    (
    ([X].[d] <> [Y].[d])
    OR
    (
    (
    ([X].[d] IS NULL)
    AND ([Y].[d] IS NOT NULL)
    )
    OR
    (
    ([X].[d] IS NOT NULL)
    AND ([Y].[d] IS NULL)
    )
    )
    ) THEN 'd,'
    ELSE ''
    END + CASE
    WHEN
    (
    ([X].[e] <> [Y].[e])
    OR
    (
    (
    ([X].[e] IS NULL)
    AND ([Y].[e] IS NOT NULL)
    )
    OR
    (
    ([X].[e] IS NOT NULL)
    AND ([Y].[e] IS NULL)
    )
    )
    ) THEN 'e,'
    ELSE ''
    END
    END AS [Differences]
    ,[X].[a_Watch_How_Each_CASE_is_farther_to_the_right] AS [X_a]
    ,[Y].[a_Watch_How_Each_CASE_is_farther_to_the_right] AS [Y_a]
    ,[X].[b] AS [X_b]
    ,[Y].[b] AS [Y_b]
    ,[X].[c] AS [X_c]
    ,[Y].[c] AS [Y_c]
    ,[X].[d] AS [X_d]
    ,[Y].[d] AS [Y_d]
    ,[X].[e] AS [X_e]
    ,[Y].[e] AS [Y_e]
    FROM [TEST] AS [X]
    FULL OUTER JOIN [TEST2] AS [Y]
    ON (([X].[a_Watch_How_Each_CASE_is_farther_to_the_right] = [Y].[a_Watch_How_Each_CASE_is_farther_to_the_right]))

    DataJanitor shared this idea  · 
  2. 36 votes

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    2 comments  ·  SQL Prompt  ·  Admin →
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    DataJanitor supported this idea  · 
  3. 46 votes

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    3 comments  ·  SQL Prompt  ·  Admin →
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  4. 101 votes

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  5. 57 votes

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  6. 69 votes

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  7. 85 votes

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  8. 9 votes

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  9. 4 votes

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  10. 11 votes

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    DataJanitor supported this idea  ·