一个很简单得问题！

我执行这段代码为什么在数据库里看不到数据得呢？代码是可以执行得！谁来帮我看看，很简单得！我是新手！
SQL.Add('insert into student(student_id,class_id,studnet_name,image,sex,birthday,school_date,nation,card_id,politics,native_place,is_login)');
 sql.Add('values (:student_id,:class_id,:student_name,:image,:sex,:birthday,:school_date,:nation,:card_id,:politics,:native_place,:is_login)');
 ParamByName('student_id').AsString:=Trim(Edit1.Text);
 ParamByName('student_name').AsString:=Trim(Edit2.Text); ParamByName('card_id').AsString:=Trim(Edit3.Text);
 ParamByName('class_id').AsString:=Trim(DBLookupComboBox1.Text);
 ParamByName('sex').AsString:=Trim(ComboBox1.Text);
 ParamByName('nation').AsString:=Trim(ComboBox2.Text);
 ParamByName('native_place').AsString:=Trim(ComboBox3.Text);
 ParamByName('politics').AsString:=Trim(ComboBox4.Text);
 ParamByName('is_login').AsString:=Trim(ComboBox5.Text);
 ParamByName('birthday').AsDateTime:=DateTimepicker1.Date;
 ParamByName('school_date').AsDateTime:=DateTimepicker2.Date;图片插入得代码如下：
if OpenpictureDialog1.Execute then
begin     image1.Picture:=TPicture.Create;
     Table1.Edit;
     image1.Picture.LoadFromFile(OpenPictureDialog1.FileName);
     Table1.FieldByName('image').Assign(image1.Picture);
end;
  end;谢谢个位回答我得高手！
如果谁是delphi得高手能留个qq什么得吗？我想问问问题！本人想学习下！谢谢！