資料庫查詢語法錯誤!

SELECT TOP 1 QA_Question, QA_Answer, QA_QA_Serial_list, QC_Serial, QC_Name FROM LY_QuestionAnswer AS A LEFT JOIN LY_QuestionClass AS B ON A.QA_QC_Serial = B.QC_Serial WHERE QA_Serial = 2 AND QA_Available = 1 AND QA_On = 1

System.Data.OleDb.OleDbException: System resource exceeded. at System.Data.OleDb.OleDbCommand.ExecuteCommandTextErrorHandling(OleDbHResult hr) at System.Data.OleDb.OleDbCommand.ExecuteCommandTextForSingleResult(tagDBPARAMS dbParams, Object& executeResult) at System.Data.OleDb.OleDbCommand.ExecuteCommandText(Object& executeResult) at System.Data.OleDb.OleDbCommand.ExecuteCommand(CommandBehavior behavior, Object& executeResult) at System.Data.OleDb.OleDbCommand.ExecuteReaderInternal(CommandBehavior behavior, String method) at System.Data.OleDb.OleDbCommand.ExecuteReader(CommandBehavior behavior) at System.Data.OleDb.OleDbCommand.ExecuteReader() at ccioo.Data.DB.ExecuteReader(String myQuery)