ClientDataSet1.CommandText := sSQL;  
ClientDataSet1.Params.Clear;
ClientDataSet1.CommandText :='SELECT * FROM test WHERE ID=:TID and Code=:Code ';   //传参后面加一个空格
ClientDataSet1.Params.ParamByName('TID').AsInteger:=1001;
ClientDataSet1.Params.ParamByName('Code').AsString:= '5668';

//每个":Code "后面，都跟上一个“ ”(空格)

function TWorkWindowForm.GetDataSetSQL(DataSet: TClientDataSet): string;
var
  i:integer;
  sSQL,
  sName,
  sVaule:string;
begin
  Result := '';
  DataSet.Close;
  sSQL := DataSet.CommandText;
  for i:=0 to DataSet.Params.Count-1 do
  begin
    sName := DataSet.Params.Items[i].Name;
    sVaule := DataSet.Params.Items[i].Value;
    if DataSet.Params.Items[i].DataType in [ftString,ftMemo] then //根据数据类型 自己再修改一下
      sSQL:=StringReplace(sSQL, ':'+sName+' ' , QuotedStr(sVaule)+' ',[rfReplaceAll])
    else
     sSQL:=StringReplace(sSQL, ':'+sName+' ' ,sVaule+' ' ,[rfReplaceAll]);
  end;
  Result := sSQL;
end;