將具有多個結果的動態變量插入臨時表

Question

我想將動態變量中的多個記錄插入到臨時表中，但我無法獲得成功。 INSERT無法取得成功。 你有什么想法嗎？

我收到以下錯誤： A SELECT statement that assigns a value to a variable must not be combined with data-retrieval operations.

部分代碼：

-- Creating temp table
CREATE TABLE #tempTest
(
    one DATE,
    two ID,
    three NVARCHAR(60)
)
DECLARE @test NVARCHAR(MAX)
-- Selecting 3 records (Date, Id, Email) to insert into temp table
SELECT @test = Date, Id, Email --throws error in this line
FROM   (SELECT [Date], [Id], [Email]
        FROM (
            SELECT ROW_NUMBER() OVER (ORDER BY FI.Id ASC) AS 'RowNum', CONVERT(DATE, FormV.[DateUpdated])   AS  [Date], FI.Id AS [Id]
            FROM        FormI                           AS  FI
            INNER JOIN  FormV                           AS  FormV
            ON          FI.FormVId  = FormV.Id
            INNER JOIN  NavArt                              AS  NA
            ON          FI.ArtId        = NA.Id
            WHERE       FI.WorkShiftId      = 10 
            ) withRownNum
        WHERE RowNum = 1

    ) a

-- Here I'm trying to insert these records to temp table, but unsuccessfully
INSERT INTO #tempTest VALUES(@colsConversion)

Answer 1

問題在於，您不能select將某些列分配給變量的選項，而不能選擇所有列。 我不明白為什么你要分配任何，但你也可以有@id和@email變量。

如果要創建臨時表，為什么不這樣做呢？

    SELECT [Date], [Id], [Email]
    INTO #temptest
    FROM (
        SELECT ROW_NUMBER() OVER (ORDER BY FI.Id ASC) AS RowNum, CONVERT(DATE, FormV.[DateUpdated])   AS  [Date], FI.Id AS [Id]
        FROM        FormI                           AS  FI
        INNER JOIN  FormV                           AS  FormV
        ON          FI.FormVId  = FormV.Id
        INNER JOIN  NavArt                              AS  NA
        ON          FI.ArtId        = NA.Id
        WHERE       FI.WorkShiftId      = 10 
        ) withRownNum
    WHERE RowNum = 1;

注意：編寫此子查詢可能更簡單（例如使用top ），但這是另一個問題的答案。

Answer 2

你不需要變量。 嘗試這個：

CREATE TABLE #tempTest
(
    one DATE,
    two ID,
    three NVARCHAR(60)
)
INSERT INTO #tempTest
SELECT  Date, Id, Email 
FROM   (SELECT [Date], [Id], [Email]
        FROM (
            SELECT ROW_NUMBER() OVER (ORDER BY FI.Id ASC) AS 'RowNum', CONVERT(DATE, FormV.[DateUpdated])   AS  [Date], FI.Id AS [Id]
            FROM        FormI                           AS  FI
            INNER JOIN  FormV                           AS  FormV
            ON          FI.FormVId  = FormV.Id
            INNER JOIN  NavArt                              AS  NA
            ON          FI.ArtId        = NA.Id
            WHERE       FI.WorkShiftId      = 10 
            ) withRownNum
        WHERE RowNum = 1

    ) a