Question

我试图将一个变量传递给OPENROWSET中的SELECT语句，但我一直收到错误

DECLARE @dDateTIME DATE

SET @dDateTIME = (SELECT SalesDate FROM dbo.SalesDate)

INSERT INTO dbo.tblSales
SELECT * FROM OPENROWSET('MSDASQL', 'dsn=mydsn;uid=myid;pwd=mypwd;',
    'SELECT 
        ID,
        TranDate,
        ProductID,
        CostValue,
        SalesValue,
        QtySold,
    FROM tblSales WHERE TranDate='' + @dDateTIME + ''')

DECLARE @dDateTIME DATE
SET @dDateTIME = (SELECT SalesDate FROM dbo.SalesDate)

DECLARE @SQL NVARCHAR(1024) = 
 'SELECT 
        ID,
        TranDate,
        ProductID,
        CostValue,
        SalesValue,
        QtySold,
    FROM tblSales WHERE TranDate=''' + CAST(@dDateTIME AS VARCHAR(64)) + ''''

DECLARE @RunSQL NVARCHAR(max) 
SET @RunSQL=
    'SELECT * FROM OPENROWSET (''MSDASQL'', ''dsn=mydsn;uid=myid;pwd=mypwd;'',''EXEC @SQL'')'`

我使用什么语法来申请@SQL？

我得到的错误是：

错误是：OLE DB提供程序“MSDASQL”链接服务器“（null）”返回消息“[Pervasive] [ODBC客户端接口] [LNA] [Pervasive] [ODBC引擎接口]谓词错误：TranDate =' （SELECT @dDateTIME）'“

Answer 1

您的变量未连接到字符串（其'''以关闭带有'的字符串）以更正此字符（并执行必要的类型转换）：

DECLARE @SQL NVARCHAR(1024) = 
 'SELECT 
        ID,
        TranDate,
        ProductID,
        CostValue,
        SalesValue,
        QtySold,
    FROM tblSales WHERE TranDate=''' + CAST(@dDateTIME AS VARCHAR(64)) + ''''

此外，您无法将表达式或变量与OPENROWSET一起使用，因此您需要通过EXEC() / sp_executeSQL调用它，请参阅; Using a Variable in OPENROWSET Query

Answer 2

您可以动态创建SQL语句，然后运行该命令。

DECLARE @dDateTIME DATE,
        @RunSQL NVARCHAR(max) 

SET @dDateTIME = (SELECT SalesDate FROM dbo.SalesDate)

SELECT @RunSQL =
  'INSERT INTO dbo.tblSales
   SELECT * FROM OPENROWSET(''MSDASQL'', ''dsn=mydsn;uid=myid;pwd=mypwd;'',
    ''SELECT 
        ID,
        TranDate,
        ProductID,
        CostValue,
        SalesValue,
        QtySold,
    FROM tblSales WHERE TranDate=''''' + CONVERT(nvarchar, @dDateTIME, 112) + ''''''')'
--PRINT @RunSQL    
EXEC sp_executesql @RunSQL

SQL SELECT * FROM OPENROWSET with Variable

2 个答案: