delphi 中如何执行SqlParameter形式的SQL语句

01.procedure TForm1.Button1Click(Sender: TObject);
 02.begin
 03.  ADOConnection1.Open('xj','123456');
 04.  ADOQuery1.Close;
 05.  ADOQuery1.SQL.Clear;
 06.  ADOQuery1.SQL.Add('insert into UserInfo(UserName,  UserPwd,  Address,  RoleID,  IsDel,  CreateDate) values(:UserName,  :UserPwd,  :Address,  :RoleID,  :IsDel,  :CreateDate)');
 07.  ADOQuery1.Parameters.Clear;
 08.  ADOQuery1.Parameters.CreateParameter('UserName',ftString,pdInput,50,'aaa');
 09.  ADOQuery1.Parameters.CreateParameter('UserPwd',ftString,pdInput,50,'aaa1');
 10.  ADOQuery1.Parameters.CreateParameter('Address',ftString,pdInput,50,'aaa2');
 11.  ADOQuery1.Parameters.CreateParameter('RoleID',ftInteger,pdInput,50,1);
 12.  ADOQuery1.Parameters.CreateParameter('IsDel',ftInteger,pdInput,50,0);
 13.  ADOQuery1.Parameters.CreateParameter('CreateDate',ftDateTime,pdInput,50,null);
 14.  ADOQuery1.ExecSQL;
 15.  ADOConnection1.Close;
 16.end;

　　也可以通过预编译执行SQL：

01.procedure TForm1.Button1Click(Sender: TObject);
 02.begin
 03.  
 04.  ADOConnection1.Open('xj','123456');
 05.  ADOQuery1.Close;
 06.  ADOQuery1.SQL.Clear;
 07.  ADOQuery1.SQL.Add('insert into UserInfo(UserName,  UserPwd,  Address,  RoleID,  IsDel,  CreateDate) values(:UserName,  :UserPwd,  :Address,  :RoleID,  :IsDel,  :CreateDate)');
 08.  ADOQuery1.Prepared:=True;//预编译置为True 
09.  {
 10.  ADOQuery1.Parameters.Clear;
 11.  ADOQuery1.Parameters.CreateParameter('UserName',ftString,pdInput,50,UserInfo.UserName);
 12.  ADOQuery1.Parameters.CreateParameter('UserPwd',ftString,pdInput,50,UserInfo.UserPwd);
 13.  ADOQuery1.Parameters.CreateParameter('Address',ftString,pdInput,50,UserInfo.Address);
 14.  ADOQuery1.Parameters.CreateParameter('RoleID',ftString,pdInput,50,UserInfo.RoleID);
 15.  ADOQuery1.Parameters.CreateParameter('IsDel',ftString,pdInput,50,UserInfo.IsDel);
 16.  ADOQuery1.Parameters.CreateParameter('CreateDate',ftString,pdInput,50,UserInfo.CreateDate);
 17.  }
 18.//不用创建Parameter，而是直接给Parameter赋值，通常都采用这种方法，预编译能够优化SQL语句，提高执行效率。 
19.  ADOQuery1.Parameters[0].Value:='aaaun';
 20.  ADOQuery1.Parameters[1].Value:='aaapwd';
 21.  ADOQuery1.Parameters[2].Value:='aaaadress';
 22.  ADOQuery1.Parameters[3].Value:='1';
 23.  ADOQuery1.Parameters[4].Value:='0';
 24.  ADOQuery1.Parameters[5].Value:='2008-9-18';
 25.  ADOQuery1.ExecSQL;
 26.  ADOConnection1.Close;
 27.
 28.  
 29.end;