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我在 Visual Studio 2019 上使用 ML.Net 模型生成器版本：16.3.0.2056001，使用 .Net 5.0。

使用带有新模板项目的模型生成器向导，我选择添加 > 机器学习 > 连接到 SQL Server，它已成功测试并且表数据正确加载到预览中。

当我继续到下一个屏幕并单击开始训练时，我收到以下错误：

Incorrect syntax near the keyword 'Open'

at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action1 wrapCloseInAction) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady) at System.Data.SqlClient.SqlDataReader.TryConsumeMetaData() at System.Data.SqlClient.SqlDataReader.get_MetaData() at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString, Boolean isInternal, Boolean forDescribeParameterEncryption, Boolean shouldCacheForAlwaysEncrypted) at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, Boolean inRetry, SqlDataReader ds, Boolean describeParameterEncryptionRequest) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource1 completion, Int32 timeout, Task& task, Boolean& usedCache, Boolean asyncWrite, Boolean inRetry)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
at Microsoft.ML.Data.DatabaseLoader.Cursor.get_DataReader()
at Microsoft.ML.Data.DatabaseLoader.Cursor.MoveNextCore()
at Microsoft.ML.Data.RootCursorBase.MoveNext()
at Microsoft.ML.AutoML.DatasetDimensionsUtil.CountRows(IDataView data, UInt64 maxRows)
at Microsoft.ML.AutoML.ExperimentBase2.Execute(IDataView trainData, ColumnInformation columnInformation, IEstimator1 preFeaturizer, IProgress1 progressHandler) at Microsoft.ML.ModelBuilder.AutoMLService.Experiments.AutoMLExperiment3.<>c__DisplayClass21_0.b__5() in //src/Microsoft.ML.ModelBuilder.AutoMLService/Experiments/AutoMLExperiment.cs:line 80
at System.Threading.Tasks.Task1.InnerInvoke() at System.Threading.Tasks.Task.Execute() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.ML.ModelBuilder.AutoMLService.Experiments.AutoMLExperiment3.d__21.MoveNext() in //src/Microsoft.ML.ModelBuilder.AutoMLService/Experiments/AutoMLExperiment.cs:line 107
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.ML.ModelBuilder.AutoMLEngine.d__26.MoveNext() in /_/src/Microsoft.ML.ModelBuilder.AutoMLService/AutoMLEngineService/AutoMLEngine.cs:line 150

这是标准的脚手架项目，我尝试添加以下 nuget 包来尝试解决此问题：

<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>net5.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.ML" Version="1.5.4" />
    <PackageReference Include="Microsoft.ML.Experimental" Version="0.17.4" />
  </ItemGroup>

</Project>
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1 回答 1

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好的，我已经解决了这个问题。我正在使用交易市场数据，其中包括一个名为'Open'的价格列和另一个'Close' 的列。ML.Net 不喜欢这些列名。一旦我将它们重命名为 OpenPrice 和 ClosePrice，培训运行良好 :)

于 2021-03-01T08:08:40.293 回答