加入视图时的SQL性能问题

Question

我有这个查询，它与视图上的查询一起加入后将永远运行。 加入之前，需要2分钟。 加入的查询本身需要1分钟。 他们在一起已经走了20多分钟。

我的问题是：

• 除了在视图上创建索引外，我可以做些什么来使此查询运行更快？
• 创建索引会使该查询在合理的时间内运行吗？

谢谢。 这是查询：

    DECLARE @year INT=2017;
WITH data AS (
    SELECT M.Brand, M.SubBrand, M.Detail, S.Units, S.OB, [PRODUCTION_DATE] = RIGHT(S.DateId,2)
    , [PRODUCTION_YEAR] = LEFT(S.DateId,4), [PRODUCTION_MONTH] = SUBSTRING(CONVERT(VARCHAR(10), S.DateId),5,2) FROM [fact].[Sales] V
    LEFT JOIN [dim].[Material] M ON M.MaterialId = S.MaterialId
    INNER JOIN (SELECT [MaterialId]
                  ,[ROF]
                  ,[OB]
              FROM [Objectives].[load].[FactData_KPI_Sales_OB_ROF]
              WHERE ROF > 0) RFOB ON RFOB.MaterialId = S.MaterialId
    WHERE LEFT(S.DateId,4) > @year
)
SELECT Brand, SubBrand, Detail, [PRODUCTION_MONTH], [PRODUCTION_YEAR], OB, [01], [02], [03], [04], [05], [06], [07], [08], [09], [10], [11], [12], [13], [14], [15], [16], [17], [18], [19], [20], [21], [22], [23], [24], [25], [26], [27], [28], [29], [30], [31]
FROM data
Pivot (
    SUM(Units)
    FOR [PRODUCTION_DATE] In
    ([01], [02], [03], [04], [05], [06], [07], [08], [09], [10], [11], [12], [13], [14], [15], [16], [17], [18], [19], [20], [21], [22], [23], [24], [25], [26], [27], [28], [29], [30], [31])
    ) AS piv

Answer 1

您是否尝试过使用临时表而不是通用表？

DECLARE @year INT=2017;
SELECT M.Brand, M.SubBrand, M.Detail, S.Units, S.OB, [PRODUCTION_DATE] = RIGHT(S.DateId,2)
        , [PRODUCTION_YEAR] = LEFT(S.DateId,4), [PRODUCTION_MONTH] = SUBSTRING(CONVERT(VARCHAR(10), S.DateId),5,2) 
    Into #tmpData   
        FROM [fact].[Sales] V
        LEFT JOIN [dim].[Material] M ON M.MaterialId = S.MaterialId
        INNER JOIN (SELECT [MaterialId]
                      ,[ROF]
                      ,[OB]
                  FROM [Objectives].[load].[FactData_KPI_Sales_OB_ROF]
                  WHERE ROF > 0) RFOB ON RFOB.MaterialId = S.MaterialId
        WHERE LEFT(S.DateId,4) > @year

    SELECT Brand, SubBrand, Detail, [PRODUCTION_MONTH], [PRODUCTION_YEAR], OB, [01], [02], [03], [04], [05], [06], [07], [08], [09], [10], [11], [12], [13], [14], [15], [16], [17], [18], [19], [20], [21], [22], [23], [24], [25], [26], [27], [28], [29], [30], [31]
    FROM #tmpData
    Pivot (
        SUM(Units)
        FOR [PRODUCTION_DATE] In
        ([01], [02], [03], [04], [05], [06], [07], [08], [09], [10], [11], [12], [13], [14], [15], [16], [17], [18], [19], [20], [21], [22], [23], [24], [25], [26], [27], [28], [29], [30], [31])
        ) AS piv

Answer 2

你尝试过这个吗

    DECLARE @year INT=2017;
WITH data AS (
    SELECT M.Brand, M.SubBrand, M.Detail, S.Units, S.OB, [PRODUCTION_DATE] = RIGHT(S.DateId,2)
    , [PRODUCTION_YEAR] = LEFT(S.DateId,4), [PRODUCTION_MONTH] = SUBSTRING(CONVERT(VARCHAR(10), S.DateId),5,2) FROM [fact].[Sales] S
    LEFT JOIN [dim].[Material] M ON M.MaterialId = S.MaterialId
    INNER JOIN   [Objectives].[load].[FactData_KPI_Sales_OB_ROF] RFOB 

在RFOB.MaterialId = S.MaterialId的情况下（（S.DateId，4）> @year和RFOB.ROF> 0）