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POHow to solve a default value error when running an update/insert query in Delphi 7?
 

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  1. POHow to solve a default value error when running an update/insert query in Delphi 7?
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    <p>I keep getting an error in Delphi 7 with my application that uses the Microsoft Jet engine and a Microsoft Access (*.mdb) database. I am making the connection via a TADOQuery component. The error says 'Parameter iPointsNew has no default value' and happens only when using an integer variable in an update/insert query:</p> <pre><code>frmHome.adoqryInLoop.SQL.Text := 'UPDATE Users SET Points = iPointsNew WHERE UID = "'+sUID+'"'; </code></pre> <p>The event handler's code is as follows:</p> <pre><code> procedure TfrmAdmin.bmbSubmitClick(Sender: TObject); var sScore, sEID, sPrediction, sUID : String; iRecordCount, x, iPos, iLength, iActual, iPoints, iPointsNew : Integer; rPrediction : Real; begin // Assign values to variables sScore := IntToStr(sedSuthies.Value) + '-' + IntToStr(sedOpponent.Value); iActual := sedSuthies.Value + sedOpponent.Value; sEID := frmHome.arrEID[lstEvents.ItemIndex]; // Update the score for the event in the database frmHome.adoqryMain.Active := False; frmHome.adoqryMain.SQL.Clear; frmHome.adoqryMain.SQL.Text := 'UPDATE Events SET Score = "'+sScore+'",Complete = True WHERE EID = "'+sEID+'" '; frmHome.adoqryMain.ExecSQL; frmHome.adoqryMain.SQL.Text := 'SELECT * FROM Predictions WHERE EID = "'+sEID+'" '; frmHome.adoqryMain.Open; iRecordCount := frmHome.adoqryMain.RecordCount; //Assign points to users for all the predictions for x := 0 to (iRecordCount - 1) do begin sUID := frmHome.adoqryMain.Fields[1].AsString; sPrediction := frmHome.adoqryMain.Fields[4].AsString; iPos := Pos('-',sPrediction) - 1; iLength := Length(sPrediction) - iPos; ShowMessage('1'); if ((sedSuthies.Value &gt;= sedOpponent.Value) AND (StrToFloat(Copy(sPrediction, 1, iPos)) &gt;= StrToFloat(Copy(sPrediction, iPos + 2, iLength + 1)))) OR ((sedSuthies.Value &lt; sedOpponent.Value) AND (StrToFloat(Copy(sPrediction, 1, iPos)) &lt; StrToFloat(Copy(sPrediction, iPos + 2, iLength + 1)))) then begin rPrediction := StrToFloat(Copy(sPrediction, iPos + 2, iLength + 1)) + StrToFloat(Copy(sPrediction, 1, iPos)); if rPrediction &gt;= iActual then rPrediction := rPrediction - iActual else rPrediction := iActual - rPrediction; iPoints := Round(10 * (1 - (rPrediction / iActual))); end else iPoints := 0; ShowMessage('2'); frmHome.adoqryInLoop.Close; frmHome.adoqryInLoop.SQL.Text := 'SELECT * FROM Users WHERE UID ="'+sUID+'"'; frmHome.adoqryInLoop.Open; iPointsNew := frmHome.adoqryInLoop.Fields[10].AsInteger + iPoints; ShowMessage(IntToStr(iPointsNew)); frmHome.adoqryInLoop.Close; frmHome.adoqryInLoop.SQL.Text := 'UPDATE Users SET Points = iPointsNew WHERE UID = "'+sUID+'"'; frmHome.adoqryInLoop.ExecSQL; frmHome.adoqryInLoop.Close; frmHome.adoqryInLoop.SQL.Text := 'UPDATE Predictions SET Complete = True WHERE UID = "'+sUID+'" AND EID = "'+sEID+'" '; frmHome.adoqryInLoop.ExecSQL; ShowMessage('3'); ShowMessage(IntToStr(iPoints)); frmHome.adoqryMain.Next; end; ShowMessage('Score succefully submitted!'); frmHome.UpdateEventLists; end; </code></pre> <p>This error only occurs when trying to use an integer variable. I have tried many solutions such as using quotes, plus' and even testing with a normal integer such as 10 (It works when using a set number). Any help would be greatly appreciated.</p> <p>P.S. The ShowMessage functions are there for debugging purposes and will be removed.</p>
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    1. CO@PieterB last helped me with my previous question on this same event handler ([link](http://stackoverflow.com/questions/19763899/how-to-solve-a-closed-dataset-error-when-running-an-update-query-in-delphi-7)) for if that helps a bit on the background of it.
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    2. COYou need to concatenate your query with that integer value converted to string (like this way `'UPDATE Users SET Points = ' + IntToStr(iPointsNew) + ' WHERE UID = "'+sUID+'"';`). But rather try to learn how to use parameters to be happy.
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    3. COThis is [related/duplicate](http://stackoverflow.com/q/19220938/937125)
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      1. POHow to solve a default value error when running an update/insert query in Delphi 7?
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