使用“ 0”参数调用“ ExecuteReader”的异常：“'='附近的语法不正确。”

Question

我正在使用SQL查询编写Powershell代码，以从我们的一个数据库中获取信息，然后将该信息放入变量中以备将来使用。 我的整个代码都能正常工作，并且确实可以完成我想要的工作。

但是在这段代码片段中的某些地方会产生两个错误，我无法弄清楚如果脚本实际上在执行应该执行的操作，为什么会发生。

$Server = "######"
$Database = "######"
$UserSqlQuery = "SELECT [UdstyrsId]
      ,[Model]
      ,[Serienr]
      ,[Udlevdato]
      ,[Repnr]
      ,[Notat]
  FROM [IT-Support].[dbo].[Udstyrsoplysninger] where aflevdato is null and repnr = $repnr"

    function ExecuteSqlQuery($Server, $Database, $UserSQLQuery) 
    {
        $Datatable = New-Object System.Data.DataTable

        $Connection = New-Object System.Data.SQLClient.SQLConnection
        $Connection.ConnectionString = "server='$Server';database='$Database';integrated security=true;"
        $Connection.Open()
        $Command = New-Object System.Data.SQLClient.SQLCommand
        $Command.Connection = $Connection
        $Command.CommandText = $UserSQLQuery
        $Reader = $Command.ExecuteReader();
        $Datatable.Load($Reader);
        $Connection.Close()

        return $Datatable
    }    
        $ResultsDataTable = New-Object System.Data.DataTable
        $ResultsDataTable = ExecuteSqlQuery $Server $Database $UserSqlQuery  

错误代码：

Exception calling "ExecuteReader" with "0" argument(s): "Incorrect syntax        near '='."
At C:\Users\adm-#######\Desktop\UserResignation.ps1:70 char:13
+             $Reader = $Command.ExecuteReader();
+             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : SqlException

Exception calling "Load" with "1" argument(s): "Value cannot be null.
Parameter name: dataReader"
At C:\Users\adm-#######\Desktop\UserResignation.ps1:71 char:13
+             $Datatable.Load($Reader);
+             ~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : ArgumentNullException

第70和71行是脚本中的这些行：

$Reader = $Command.ExecuteReader();
$Datatable.Load($Reader);

Answer 1

您忘记为查询的where条件声明$repnr ，因此您where aflevdato is null and repnr =的情况下收到语法错误。

$repnr = 123
$UserSqlQuery = "SELECT [UdstyrsId]
      ,[Model]
      ,[Serienr]
      ,[Udlevdato]
      ,[Repnr]
      ,[Notat]
  FROM [IT-Support].[dbo].[Udstyrsoplysninger] where aflevdato is null and repnr = $repnr"