关键字UNION附近的语法错误

Question

我收到错误消息，因为'关键字UNION附近的语法不正确。

靶位点是 -

Void ProcessResults(System.Data.OleDb.OleDbHResult) 

和栈跟踪如下： -

在在System.Data.OleDb System.Data.OleDb.OleDbDataReader.ProcessResults（OleDbHResult小时） System.Data.OleDb.OleDb.OleDbCommand.System.Data上System.Data.OleDb.OleDbCommand.ExecuteReader（CommandBehavior行为）System.Data.OleDb.OleDbCommand.ExecuteReaderInternal（CommandBehavior行为，字符串方法）上.OleDbDataReader.NextResult（）。 System.Data.Common.DbDataAdapter.Fill上的IDbCommand.ExecuteReader（CommandBehavior行为）内部（DataSet数据集，DataTable []数据表，Int32 startRecord，Int32 maxRecords，字符串srcTable，IDbCommand命令，CommandBehavior行为）在System.Data.Common.DbDataAdapter.Fill（DataSet dataSet，Int32 startRecord，Int32 maxRecords，String srcTable，IDbCommand命令，的CommandBehavior行为）在System.Data.Common.DbDataAdapter.Fill（DataSet的数据集）在MFActivityPlanning.NewStuffS.PopulateNewStuffsDataGrid（）

查询如下：

strSelectQuery = "SELECT LED_ID AS PK_ID, FIRST_NAME + ' ' + LAST_NAME AS NAME" 
         + " FROM M_LEADERLED INNER JOIN M_USER_DETAILS" 
         + " ON M_LEADERLED.LED_ID = M_USER_DETAILS.PK_ID" 
         + " WHERE (M_LEADERLED.LEADER_ID = " + Session["UserID"].ToString() + "" 
         + " AND M_USER_DETAILS.ACTIVE = 1 AND M_LEADERLED.START_DATE <= Getdate()" 
         + " AND M_LEADERLED.END_DATE > Getdate())" 
         + " UNION SELECT PK_ID, FIRST_NAME + ' ' + LAST_NAME AS NAME" 
         + " FROM M_USER_DETAILS WHERE PK_ID = " + Session["UserID"].ToString() + ";"; 



    // Query for Idea 
      string selectIdea = "SELECT MWL.PK_ID AS PK_ID, 'Idea'+ ': ' + MI.TITLE AS TITLE," 
         + " 'Idea.aspx?id=' + CONVERT(VARCHAR, MI.PK_ID) AS OBJECTURL" 
         + " FROM M_WATCHLIST MWL INNER JOIN M_IDEAS MI ON MWL.FK_OBJECT_ID = MI.PK_ID" 
         + " INNER JOIN M_USER_DETAILS MUD ON MUD.PK_ID = MWL.FK_USER_ID AND MUD.ACTIVE = 1" 
         + " WHERE MWL.OBJECT_TYPE = " + Convert.ToInt32(WatchType.Idea) + "" 
         + " AND MWL.FK_USER_ID = " + userId + " AND MWL.IS_ACTIVE = 1"; 
     // Query for Articles 
     string selectArticle = "SELECT MWL.PK_ID AS PK_ID, 'Articles' + ': ' + MA.TITLE AS TITLE," 
        + " 'Articles.aspx?id=' + CONVERT(VARCHAR, MA.PK_ID) AS OBJECTURL" 
        + " FROM M_WATCHLIST MWL INNER JOIN M_ARTICLES MA ON MWL.FK_OBJECT_ID = MA.PK_ID" 
        + " INNER JOIN M_USER_DETAILS MUD ON MUD.PK_ID = MWL.FK_USER_ID AND MUD.ACTIVE = 1" 
        + " WHERE MWL.OBJECT_TYPE = " + Convert.ToInt32(WatchType.Article) + "" 
        + " AND MWL.FK_USER_ID = " + userId + " AND MWL.IS_ACTIVE = 1 AND MA.IS_ACTIVE = 1"; 

     // Query for Tips 
     string selectTips = "SELECT MWL.PK_ID AS PK_ID, 'Tips' + ': ' + MT.TITLE AS TITLE," 
        + " 'Tips.aspx?id=' + CONVERT(VARCHAR, MT.PK_ID) AS OBJECTURL" 
        + " FROM M_WATCHLIST MWL INNER JOIN M_TIPS MT ON MWL.FK_OBJECT_ID = MT.PK_ID " 
        + " INNER JOIN M_USER_DETAILS MUD ON MUD.PK_ID = MWL.FK_USER_ID AND MUD.ACTIVE = 1" 
        + " WHERE MWL.OBJECT_TYPE = " + Convert.ToInt32(WatchType.Tip) + "" 
        + " AND MWL.FK_USER_ID = " + userId + " AND MWL.IS_ACTIVE = 1 AND MT.IS_ACTIVE = 1"; 

     // Query for IWantINeed 
     string selectIWantINeed = "SELECT MWL.PK_ID AS PK_ID, 'IWantINeed' + ': ' + MWN.TITLE AS TITLE," 
        + " 'IWantINeed.aspx?id=' + CONVERT(VARCHAR, MWN.PK_ID) AS OBJECTURL" 
        + " FROM M_WATCHLIST MWL INNER JOIN M_I_WANT_I_NEED MWN ON MWL.FK_OBJECT_ID = MWN.PK_ID " 
        + " INNER JOIN M_USER_DETAILS MUD ON MUD.PK_ID = MWL.FK_USER_ID AND MUD.ACTIVE = 1" 
        + " WHERE MWL.OBJECT_TYPE = " + Convert.ToInt32(WatchType.IWantINeed) + "" 
        + " AND MWL.FK_USER_ID = " + userId + " AND MWL.IS_ACTIVE = 1"; 

     // Query for PointCAT 
     string selectPointCAT = "SELECT MWL.PK_ID AS PK_ID, 'PointCAT' + ': ' + MPS.TITLE AS TITLE," 
        + " 'PointCAT.aspx?id=' + CONVERT(VARCHAR, MPS.PK_ID) AS OBJECTURL" 
        + " FROM M_WATCHLIST MWL INNER JOIN M_POINTCAT_SESSIONS MPS ON MWL.FK_OBJECT_ID = MPS.PK_ID " 
        + " INNER JOIN M_USER_DETAILS MUD ON MUD.PK_ID = MWL.FK_USER_ID AND MUD.ACTIVE = 1" 
        + " WHERE MWL.OBJECT_TYPE = " + Convert.ToInt32(WatchType.PointCAT) + "" 
        + " AND MWL.FK_USER_ID = " + userId + " AND MWL.IS_ACTIVE = 1 AND MPS.IS_ACTIVE = 1"; 

     // Query for Seminar 
     string selectSeminar = "SELECT MWL.PK_ID AS PK_ID, 'Seminar' + ': ' + MS.TITLE AS TITLE," 
        + " 'Seminar.aspx?id=' + CONVERT(VARCHAR, MS.PK_ID) AS OBJECTURL" 
        + " FROM M_WATCHLIST MWL INNER JOIN M_SEMINAR MS ON MWL.FK_OBJECT_ID = MS.PK_ID " 
        + " INNER JOIN M_USER_DETAILS MUD ON MUD.PK_ID = MWL.FK_USER_ID AND MUD.ACTIVE = 1" 
        + " WHERE MWL.OBJECT_TYPE = " + Convert.ToInt32(WatchType.Seminar) + "" 
        + " AND MWL.FK_USER_ID = " + userId + " AND MWL.IS_ACTIVE = 1 AND MS.IS_ACTIVE = 1"; 

     // Query for CodeCAT 
     string selectCodeCAT = "SELECT DISTINCT MWL.PK_ID AS PK_ID, 'Code Review Feedback:" 
        + " ' + MUD1.FIRST_NAME + ' ' + MUD1.LAST_NAME AS TITLE," 
        + " 'CodeCatFeedback.aspx?id=' + CONVERT(VARCHAR, MCS.PK_ID) AS OBJECTURL" 
        + " FROM M_WATCHLIST MWL INNER JOIN M_CODECAT_SESSIONS MCS ON MWL.FK_OBJECT_ID = MCS.PK_ID " 
        + " INNER JOIN M_USER_DETAILS MUD ON MUD.PK_ID = MWL.FK_USER_ID AND MUD.ACTIVE = 1" 
        + " INNER JOIN M_USER_DETAILS MUD1 ON MUD1.PK_ID = MCS.REVIEW_MEMBER" 
        + " WHERE MWL.OBJECT_TYPE = " + Convert.ToInt32(WatchType.CodeCatFeedback) + "" 
        + " AND MWL.FK_USER_ID = " + userId + " AND MWL.IS_ACTIVE = 1 AND MCS.ACTIVE = 1"; 

     // Query for NowShowing 
     string selectNowShowing = "SELECT MWL.PK_ID AS PK_ID, 'NowShowing' + ': ' + MNS.TITLE AS TITLE," 
        + " 'NowShowing.aspx?id=' + CONVERT(VARCHAR, MNS.PK_ID) AS OBJECTURL" 
        + " FROM M_WATCHLIST MWL INNER JOIN M_NOW_SHOWING MNS ON MWL.FK_OBJECT_ID = MNS.PK_ID " 
        + " INNER JOIN M_USER_DETAILS MUD ON MUD.PK_ID = MWL.FK_USER_ID AND MUD.ACTIVE = 1" 
        + " WHERE MWL.OBJECT_TYPE = " + Convert.ToInt32(WatchType.NowShowing) + "" 
        + " AND MWL.FK_USER_ID = " + userId + " AND MWL.IS_ACTIVE = 1 AND MNS.IS_ACTIVE = 1"; 

     // Query for QA 
     string selectQA = "SELECT MWL.PK_ID AS PK_ID, 'Q&A' + ': ' + MQ.TITLE AS TITLE," 
        + " 'QA.aspx?id=' + CONVERT(VARCHAR, MQ.PK_ID) AS OBJECTURL" 
        + " FROM M_WATCHLIST MWL INNER JOIN M_QA MQ ON MWL.FK_OBJECT_ID = MQ.PK_ID " 
        + " INNER JOIN M_USER_DETAILS MUD ON MUD.PK_ID = MWL.FK_USER_ID AND MUD.ACTIVE = 1" 
        + " WHERE MWL.OBJECT_TYPE = " + Convert.ToInt32(WatchType.QA) + "" 
        + " AND MWL.FK_USER_ID = " + userId + " AND MWL.IS_ACTIVE = 1 AND MQ.IS_ACTIVE = 1"; 

     // Query for Message 
     string selectMessage = "SELECT MWL.PK_ID AS PK_ID, 'Message' + ': ' + MS.SUBJECT AS TITLE," 
        + " 'Message.aspx?id=' + CONVERT(VARCHAR, MS.PK_ID) AS OBJECTURL" 
        + " FROM M_WATCHLIST MWL INNER JOIN M_MESSAGE MS ON MWL.FK_OBJECT_ID = MS.PK_ID " 
        + " INNER JOIN M_USER_DETAILS MUD ON MUD.PK_ID = MWL.FK_USER_ID AND MUD.ACTIVE = 1" 
        + " WHERE MWL.OBJECT_TYPE = " + Convert.ToInt32(WatchType.Message) + "" 
        + " AND MWL.FK_USER_ID = " + userId + " AND MWL.IS_ACTIVE = 1 AND MS.IS_ACTIVE = 1"; 

     // Query for Documents 
     string selectDocuments = "SELECT MWL.PK_ID AS PK_ID, 'Documents' + ': ' + MSV.TITLE AS TITLE," 
        + " 'Document.aspx?id=' + CONVERT(VARCHAR, MSD.PK_ID) AS OBJECTURL" 
        + " FROM M_WATCHLIST MWL INNER JOIN M_SHARE_DOCUMENT MSD ON MWL.FK_OBJECT_ID = MSD.PK_ID " 
        + " INNER JOIN M_USER_DETAILS MUD ON MUD.PK_ID = MWL.FK_USER_ID AND MUD.ACTIVE = 1" 
        + " INNER JOIN M_SHARE_DOC_VERSION MSV ON MSV.FK_DOC_ID = MSD.PK_ID AND MSV.IS_ACTIVE =1" 
        + " WHERE MWL.OBJECT_TYPE = " + Convert.ToInt32(WatchType.Document) + "" 
        + " AND MWL.FK_USER_ID = " + userId + " AND MWL.IS_ACTIVE = 1 AND MSD.IS_ACTIVE = 1"; 

     // Query for Candidate 
     string selectCandidate = "SELECT MWL.PK_ID AS PK_ID, 'Candidate' + ': ' + MC.CAND_NAME AS TITLE," 
        + " 'Candidates.aspx?id=' + CONVERT(VARCHAR, MC.PK_ID) AS OBJECTURL" 
        + " FROM M_WATCHLIST MWL INNER JOIN M_CANDIDATE MC ON MWL.FK_OBJECT_ID = MC.PK_ID " 
        + " INNER JOIN M_USER_DETAILS MUD ON MUD.PK_ID = MWL.FK_USER_ID AND MUD.ACTIVE = 1" 
        + " WHERE MWL.OBJECT_TYPE = " + Convert.ToInt32(WatchType.Candidate) + "" 
        + " AND MWL.FK_USER_ID = " + userId + " AND MWL.IS_ACTIVE = 1"; 

     // Query for Prospect 
     string selectProspect = "SELECT MWL.PK_ID AS PK_ID, 'Prospect' + ': ' + MP.PROSPECT_NAME AS TITLE," 
        + " 'Prospect2.aspx?id=' + CONVERT(VARCHAR, MP.PK_ID) AS OBJECTURL" 
        + " FROM M_WATCHLIST MWL INNER JOIN M_PROSPECT MP ON MWL.FK_OBJECT_ID = MP.PK_ID " 
        + " INNER JOIN M_USER_DETAILS MUD ON MUD.PK_ID = MWL.FK_USER_ID AND MUD.ACTIVE = 1" 
        + " WHERE MWL.OBJECT_TYPE = " + Convert.ToInt32(WatchType.Prospect) + "" 
        + " AND MWL.FK_USER_ID = " + userId + " AND MWL.IS_ACTIVE = 1"; 

     // Query for ToolCAT 
     string selectToolCAT = "SELECT MWL.PK_ID AS PK_ID, 'ToolCAT' + ': ' + MT.TOOL_NAME AS TITLE," 
        + " 'Catalyst/ToolCAT.aspx?id=' + CONVERT(VARCHAR, MT.PK_ID) AS OBJECTURL" 
        + " FROM M_WATCHLIST MWL INNER JOIN M_TOOLCAT MT ON MWL.FK_OBJECT_ID = MT.PK_ID " 
        + " INNER JOIN M_USER_DETAILS MUD ON MUD.PK_ID = MWL.FK_USER_ID AND MUD.ACTIVE = 1" 
        + " WHERE MWL.OBJECT_TYPE = " + Convert.ToInt32(WatchType.ToolCAT) + "" 
        + " AND MWL.FK_USER_ID = " + userId + " AND MWL.IS_ACTIVE = 1 AND MT.IS_ACTIVE = 1"; 

string selectLearningMatter = "SELECT DISTINCT MWL.PK_ID AS PK_ID, 'Learning Matter: ' + KMLM.TITLE AS TITLE," 
         + " 'KLMS/LearningMatterView.aspx?id=' + CONVERT(VARCHAR, KMLM.PK_ID) AS OBJECTURL" 
         + " FROM M_WATCHLIST MWL INNER JOIN KLMS_M_LEARNING_MATTER KMLM" 
         + " ON MWL.FK_OBJECT_ID = KMLM.PK_ID INNER JOIN M_USER_DETAILS MUD" 
         + " ON MUD.PK_ID = MWL.FK_USER_ID AND MUD.ACTIVE = 1" 
         + " WHERE MWL.OBJECT_TYPE = 505 AND MWL.FK_USER_ID = " + userId + " AND" 
         + " MWL.IS_ACTIVE = 1 AND KMLM.IS_ACTIVE = 1"; 
     // Query for Questions 
     string selectQuestions = "SELECT DISTINCT MWL.PK_ID AS PK_ID, 'Questions: ' + CONVERT(VARCHAR(400)," 
        + " [QUESTION]) AS [TITLE]," 
        + " 'KLMS/Question.aspx?id=' + CONVERT(VARCHAR, KMQ.PK_ID) AS OBJECTURL" 
        + " FROM M_WATCHLIST MWL INNER JOIN KLMS_M_QUESTIONS KMQ" 
        + " ON MWL.FK_OBJECT_ID = KMQ.PK_ID INNER JOIN M_USER_DETAILS MUD" 
        + " ON MUD.PK_ID = MWL.FK_USER_ID AND MUD.ACTIVE = 1" 
        + " WHERE MWL.OBJECT_TYPE = 510 AND MWL.FK_USER_ID = " + userId + " AND" 
        + " MWL.IS_ACTIVE = 1 AND KMQ.IS_ACTIVE = 1"; 

     // Query for Test 
     string selectTest = "SELECT DISTINCT MWL.PK_ID AS PK_ID, 'Tests: ' + KMT.TITLE AS TITLE," 
        + " 'KLMS/Test.aspx?id=' + CONVERT(VARCHAR, KMT.PK_ID) AS OBJECTURL" 
        + " FROM M_WATCHLIST MWL INNER JOIN KLMS_M_TESTS KMT" 
        + " ON MWL.FK_OBJECT_ID = KMT.PK_ID INNER JOIN M_USER_DETAILS MUD" 
        + " ON MUD.PK_ID = MWL.FK_USER_ID AND MUD.ACTIVE = 1" 
        + " WHERE MWL.OBJECT_TYPE = 515 AND MWL.FK_USER_ID = " + userId + " AND" 
        + " MWL.IS_ACTIVE = 1 AND KMT.IS_ACTIVE = 1"; 

     // Query for Course 
     string selectCourse = "SELECT DISTINCT MWL.PK_ID AS PK_ID, 'Courses: ' + KMC.TITLE AS TITLE," 
        + " 'KLMS/Course.aspx?id=' + CONVERT(VARCHAR, KMC.PK_ID) AS OBJECTURL" 
        + " FROM M_WATCHLIST MWL INNER JOIN KLMS_M_COURSES KMC" 
        + " ON MWL.FK_OBJECT_ID = KMC.PK_ID INNER JOIN M_USER_DETAILS MUD" 
        + " ON MUD.PK_ID = MWL.FK_USER_ID AND MUD.ACTIVE = 1" 
        + " WHERE MWL.OBJECT_TYPE = 500 AND MWL.FK_USER_ID = " + userId + " AND" 
        + " MWL.IS_ACTIVE = 1 AND KMC.IS_ACTIVE = 1"; 

     //************************************************************************************************ 

     string orderQuery = " ORDER BY " + GridViewSortExpression + " " + GridViewSortDirection; 

     //For All 
     if (ddlTypes.SelectedValue == "10") 
     { 
      selectStatement = selectArticle + " UNION " + selectTips + " UNION " + selectIdea 
        + " UNION " + selectIWantINeed + " UNION " + selectPointCAT + " UNION " + selectSeminar 
        + " UNION " + selectCodeCAT + " UNION " + selectNowShowing + " UNION " + selectQA 
        + " UNION " + selectMessage + " UNION " + selectDocuments + " UNION " + selectCandidate 
        + " UNION " + selectProspect + " UNION " + selectToolCAT; 

谁能帮我...

Answer 1

漂亮大型查询。我会在if和watch,selectStatement内加一个breakpoint（F9）从那里复制查询到我的sql编辑器中，然后从那里运行/修复它。

看来你缺少一些空间，或在UNION报表中的列。