用代码创建删除数据表

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, DB, DBTables;

type
  TForm1 = class(TForm)
    Memo1: TMemo;
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    Query1: TQuery;
    Database1: TDatabase;
    Label1: TLabel;
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject); //创建数据表
begin
  try
    with Query1 do
    begin
      close;
      SQL.Clear;
      SQL.Add('create table 学生表');
      SQL.Add('(学生编号 varchar(20) not null,学生姓名 varchar(20),语文成绩 int,数学成绩 int,班主任 varchar(20))');
      ExecSQL;
    end;
    Application.MessageBox('数据表创建成功。','提示',64);
  Except
    Application.MessageBox('系统出错！','提示',64);
  end;
end;

procedure TForm1.Button2Click(Sender: TObject);  //删除数据表
begin
  try
    with Query1 do
    begin
      close;
      SQL.Clear;
      SQL.Add('drop table 学生表');
      ExecSQL;
    end;
    Application.MessageBox('数据表删除成功。','提示',64);
  Except
    Application.MessageBox('系统出错！','提示',64);
  end;
end;

procedure TForm1.Button3Click(Sender: TObject); //退出
begin
  Close;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  Database1.AliasName:='DB2010';
  Query1.DatabaseName:='DB2010';
end;

end.

创建的数据表在哪里了呢？请看下图

用代码创建删除数据表

大家应该猜到了，这个数据表会创建在默认的数据库里面。。。。。也就是DB2010数据库里面。