form1.frm

来自「vb数据库编程资料」· FRM 代码 · 共 41 行

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   1095
   ClientLeft      =   60
   ClientTop       =   450
   ClientWidth     =   3420
   LinkTopic       =   "Form1"
   ScaleHeight     =   1095
   ScaleWidth      =   3420
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Command1 
      Caption         =   "创建三个查询"
      Height          =   375
      Left            =   360
      TabIndex        =   0
      Top             =   360
      Width           =   2295
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Sub Command1_Click()
   Dim Mydb As Database  '定义数据库对象变量
   Dim MyQd As QueryDef  '定义查询对象变量
   Dim SqlStr As String  '定义一个字符串变量，用来存放查询字符串
   Set Mydb = OpenDatabase(VB.App.Path & "\教务管理", True, False) '打开数据库
   SqlStr = "Select 学号,姓名,年级  from 学生  Where 专业=" & "'" & "自动化" & "'" '形成查询字符串1
   Set MyQd = Mydb.CreateQueryDef("自动化学生", SqlStr) '创建查询1
   SqlStr = "SELECT 学生.学号,学生.姓名,必修课成绩.课号,必修课成绩.成绩"
   SqlStr = SqlStr + " FROM 学生,必修课成绩 WHERE 学生.学号=必修课成绩.学号" '形成查询字符串2
   Set MyQd = Mydb.CreateQueryDef("", SqlStr)   '创建查询2
   SqlStr = "SELECT 姓名,成绩 FROM 学生,必修课成绩"
   SqlStr = SqlStr + " WHERE 学生.学号=必修课成绩.学号 and 课号=" & "'" & "01" & "'" '形成查询字符串3
   Set MyQd = Mydb.CreateQueryDef("课程01", SqlStr)  '创建查询3
End Sub