使用PowerShell或其他选项将数据从SQL实时流传输到Power BI联机服务

Question

我分配了一个任务，使用来自SQL表的实时数据流来设置实时Power BI在线服务磁贴。表中的数据每隔几秒钟更新一次。这是我到目前为止使用PowerShell所得到的。

但是似乎没有每隔几秒钟刷新一次数据集。我想念什么？

DO
        {   
        $SqlServer = 'ServerName';
        $SqlDatabase = 'DBName';
        $sleepDuration = 3
        $SqlConnectionString = 'Data Source={0};Initial Catalog={1};Integrated Security=SSPI' -f $SqlServer, $SqlDatabase;
        $SqlQuery = "SELECT * FROM MyTable;";

        $SqlCommand = New-Object -TypeName System.Data.SqlClient.SqlCommand;
        $SqlCommand.CommandText = $SqlQuery;
        $SqlConnection = New-Object -TypeName System.Data.SqlClient.SqlConnection -ArgumentList $SqlConnectionString;
        $SqlCommand.Connection = $SqlConnection;

        $SqlConnection.Open();
        $SqlDataReader = $SqlCommand.ExecuteReader();

        ##you would find your own endpoint in the Power BI service
        $endpoint = "......My PowerBI Service Push URL.........."



        #Fetch data and write out to files
        while ($SqlDataReader.Read()) {
             $payload =  
            @{
            "Col1" =$SqlDataReader['Col1']
            "Col2" =$SqlDataReader['Col2']

                } 
            Invoke-RestMethod -Method Post -Uri "$endpoint" -Body (ConvertTo-Json @($payload))
         # Sleep for a second
            Start-Sleep $sleepDuration
        }
        $SqlConnection.Close();
        $SqlConnection.Dispose();

        } While (1 -eq 1)