如何調整以下查詢？

Question

這個查詢給了我想要的結果，但我無法每次都運行這個查詢。這2個循環耗費了我所有的費用。所以我需要實現類似view.But的東西，但是邏輯中包含臨時表那麼，還有沒有其他的方式來存儲這個結果或者改變查詢，這樣會使我花費更少。

DECLARE @Temp TABLE (
    [SiteID] VARCHAR(100) 
    ,[StructureID] INT 
    ,[row] DECIMAL(4, 2) 
    ,[col] DECIMAL(4, 2) 
    ) 
DECLARE @siteID VARCHAR(100) 
    ,@structureID INT 
    ,@struct_row INT 
    ,@struct_col INT 
    ,@rows_count INT 
    ,@cols_count INT 
    ,@row INT 
    ,@col INT 

DECLARE structure_cursor CURSOR 
FOR 
SELECT StructureID 
    ,SiteID 
    ,Cols/8.5 AS Cols 
    ,Rows/11 AS Rows 
FROM Structure 
WHERE SellerID = 658 --AND StructureID = 55 

OPEN structure_cursor 

FETCH NEXT 
FROM structure_cursor 
INTO @structureID 
    ,@siteID 
    ,@struct_col 
    ,@struct_row 

SELECT @rows_count = 1 
    ,@cols_count = 1 
    ,@row = 1 
    ,@col = 1 

WHILE @@FETCH_STATUS = 0 
BEGIN 
    WHILE @row <= @struct_row 
    BEGIN 
     WHILE @col <= @struct_col 
     BEGIN 
      --PRINT 'MEssage'; 
      INSERT INTO @Temp (
       SiteID 
       ,StructureID 
       ,row 
       ,col 
       ) 
      VALUES (
       @siteID 
       ,@structureID 
       ,@rows_count 
       ,@cols_count 
       ) 

      SET @cols_count = @cols_count + 1; 
      SET @col = @col + 1; 
     END 

     SET @cols_count = 1; 
     SET @col = 1; 
     SET @rows_count = @rows_count + 1; 
     SET @row = @row + 1; 
    END 

    SET @row = 1; 
    SET @col = 1; 
    SET @rows_count = 1; 

    FETCH NEXT 
    FROM structure_cursor 
    INTO @structureID 
     ,@siteID 
     ,@struct_col 
     ,@struct_row 
END 

CLOSE structure_cursor; 

DEALLOCATE structure_cursor; 

SELECT * FROM @Temp 

Answer 1

您可以生成行數和列數，然後使用CROSS APPLY，如下所示。我遺漏了您的SellerID條件。

;WITH Cols 
AS 
(
    SELECT StructureID, SiteID, CAST(Cols/8.5 AS INT) AS Col 
    FROM Structure 
    UNION ALL 
    SELECT s.StructureID, s.SiteID, Col - 1 
    FROM Structure s 
     INNER JOIN Cols c ON s.StructureID = c.StructureID AND s.SiteID = c.SiteID 
    WHERE Col > 1 
) 
, Rows 
AS 
(
    SELECT StructureID, SiteID, CAST(Rows/11 AS INT) AS Row 
    FROM Structure 
    UNION ALL 
    SELECT s.StructureID, s.SiteID, Row - 1 
    FROM Structure s 
     INNER JOIN Rows r ON s.StructureID = r.StructureID AND s.SiteID = r.SiteID 
    WHERE Row > 1 
) 
--INSERT INTO @Temp (SiteID, StructureID, row, col) 
SELECT s.SiteID, s.StructureID, r.Row, c.Col 
FROM Structure s 
    CROSS APPLY Cols c 
    CROSS APPLY Rows r 
WHERE s.StructureID = c.StructureID AND s.SiteID = c.SiteID 
    AND s.StructureID = r.StructureID AND s.SiteID = r.SiteID 

Answer 2

與基於集合的操作執行此操作。我覺得你只是想insert . . . select：

INSERT INTO @Temp (SiteID, StructureID, row, col) 
    SELECT StructureID, SiteID, Cols/8.5 AS Cols, Rows/11 AS Rows 
    FROM Structure 
    WHERE SellerID = 658; 

你應該避免的遊標，除非你真的需要他們出於某種原因（如調用存儲過程或使用各行的動態SQL）。

編輯：

讀邏輯，它看起來像你想基於每行的限制插入行。你仍然不想使用遊標。爲此，您需要一個數字生成器，並且如果它有足夠的行，則是一個方便的數字生成器。因此：

with n as (
     select row_number() over (order by (select null)) as n 
     from master..spt_values 
    ) 
INSERT INTO @Temp (SiteID, StructureID, row, col) 
    SELECT StructureID, SiteID, ncol.n/8.5 AS Cols, nrow.n/11 AS Rows 
    FROM Structure s JOIN 
     n ncol 
     ON ncol.n <= s.struct_col CROSS JOIN 
     n nrow 
     ON nrow <= s.struct_row 
    WHERE SellerID = 658; 

Answer 3

我們可以通過使用CROSS APPLY和CTE做到這一點。

CREATE TABLE Structure(SiteID varchar(20), StructureID int, 
Cols decimal(18,2), [Rows] decimal(18,2)) 

INSERT INTO Structure (SiteID, StructureID, Cols, [Rows]) 

VALUES 

('MN353970', 51,17,22), 
('MN272252', 52,17,11) 


;WITH RowCTE([Rows]) AS 
(
    SELECT 1 
    UNION ALL 
    SELECT 2 
), 
ColCTE(Cols) AS 
(
    SELECT 1 
    UNION ALL 
    SELECT 2 
) 

SELECT SiteID, StructureID, R.Rows, C.Cols 
FROM Structure s 
CROSS APPLY 
    (
     SELECT Cols FROM ColCTE 
    ) C 
CROSS APPLY 
    (
     SELECT [Rows] FROM RowCTE 
    ) R 

Sql Fiddle Demo