Question

我正在尝试编写一个可以定义变量的视图。其中之一是“StateCd”变量。在我的查询中，我需要过滤到我在变量中定义的状态以及我在第二个WITH语句中定义的所有其他状态。我如何编写一个代码来选择第二个WITH语句中的所有状态，除了我在“StateCd”中定义的状态

WITH MyVars (StateCd, DateDay, CompanyCd, LineCd) AS 
( 
    SELECT
        'SD' AS StateCd,
        '2017-11-30' AS IssueDate,
        '010' AS CompanyCd,
        '010' AS LineCd
), MyStates (CO, IA, KS, MO, MT, NE, ND, SD, WY) AS 
( 
    SELECT
        'CO' AS CO,
        'IA' AS IA,
        'KS' AS KS,
        'MO' AS MO,
        'MT' AS MT,
        'NE' AS NE,
        'ND' AS ND,
        'SD' AS SD,
        'WY' AS WY
)

Answer 1

您的状态列表应该是数据而不是模式，这意味着您应该以不同方式构建第二个CTE。然后使用OUTER JOIN。

WITH MyVars (StateCd, DateDay, CompanyCd, LineCd)
    AS ( 
        SELECT
            'SD'            AS StateCd,
            '2017-11-30'    AS IssueDate,
            '010'           AS CompanyCd,
            '010'           AS LineCd
        ),
    MyStates ([State])
    AS ( 
        SELECT 'CO' AS [State] UNION
        SELECT 'IA' UNION
        SELECT 'KS' UNION
        SELECT 'MO' UNION
        SELECT 'MT' UNION
        SELECT 'NE' UNION
        SELECT 'ND' UNION
        SELECT 'SD' UNION
        SELECT 'WY'
        )
SELECT MyStates.[State]
FROM MyStates
LEFT JOIN MyVars ON MyVars.StateCd = MyStates.[State]
WHERE MyVars.StateCd IS NULL;

在SQL Server视图中过滤CTE

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