如何在存储过程中使用cicle白色的cicle临时表

Question

我有一个在SQL Server中创建此临时表的存储过程

CREATE TABLE #TeporaryTableAcqua
(
    Data DateTime, 
    Nome NVarchar(100), 
    Valore Decimal(10,2)
)

在存储过程中，我用任何记录填充该临时表。

--RECUPERO L'ACQUA BEVUTA OGGI
INSERT INTO #TeporaryTableAcqua
   SELECT 
       'ACQUA BEVUTA', 
       CONVERT(varchar(12), data, 105),
       SUM(QUANTITA) * 100 
   FROM 
       OmniacareDataProduction.dbo.MV_Acqua A
   WHERE 
       CONVERT(varchar(12), data,105) = CONVERT(varchar(12), GETDATE(), 105)
   GROUP BY 
       CONVERT(varchar(12), data, 105)

现在，我想创建一个cicle来一次选择一行，因此我已经构建了以下代码，但出现错误：

DECLARE @NROW INT

SELECT @NROW = COUNT(*) 
FROM #TeporaryTableAcqua 

DECLARE @Nome As NVARCHAR(100)

WHILE (@NROW>0)
BEGIN
    SELECT @Nome = Nome 
    FROM #TeporaryTableAcqua 
    LIMIT 1

    EXEC [P_TF_UTILITY_Set_FileBodies]
         @FileTempID = @FileTempID, 
         @FieldID = 8, @Value = @Nome, @RowID = 2, @OrdinalID = 1

    DELETE FROM #TeporaryTableAcqua LIMIT 1

    SELECT @NROW = COUNT(*) 
    FROM #TeporaryTableAcqua 
END

错误在LIMIT 1 。

我该如何解决？

Answer 1

为了限制该行，sql server中有一个TOP子句。 sql server中没有任何Limit类型的东西。

因此，这是您更新的脚本。

DECLARE @NROW INT
SELECT @NROW=COUNT(*) FROM #TeporaryTableAcqua 

DECLARE @Nome As NVARCHAR(100)

WHILE (@NROW>0)
BEGIN
        Select TOP 1 @Nome=Nome From #TeporaryTableAcqua Order By Nome 

        EXEC [P_TF_UTILITY_Set_FileBodies] @FileTempID=@FileTempID, @FieldID=8, @Value=@Nome, @RowID = 2, @OrdinalID = 1         

        --DELETE TOP (1) FROM #TeporaryTableAcqua
        DELETE FROM #TeporaryTableAcqua
          WHERE Nome = @Nome

        SELECT @NROW=COUNT(*) FROM #TeporaryTableAcqua 
END

Answer 2

重要的是要记住，执行查询时，其结果将以未定义的顺序返回，除非由order by子句特别指定。

考虑在数据的每一行中构成唯一标识符的因素也很重要。

如果Nome是唯一的，那么下面的代码将为您工作。

如果没有，那么您将必须在order by子句和delete语句的where子句中使用多个字段。

DECLARE @Nome As NVARCHAR(100)

WHILE exists (select * from #TeporaryTableAcqua)

BEGIN

    Set @Nome = (Select TOP 1 Nome From #TeporaryTableAcqua Order by Nome asc)

    EXEC [P_TF_UTILITY_Set_FileBodies] @FileTempID=@FileTempID, @FieldID=8, @Value=@Nome, @RowID = 2, @OrdinalID = 1      

    DELETE FROM #TeporaryTableAcqua where Nome = @Nome

END