<VB数理统计实用算法>书中的算法源程序
源代码在线查看： 数据库_通用f5.frm
VERSION 5.00
Begin VB.Form frmSQL
Appearance = 0 'Flat
BackColor = &H80000005&
Caption = "查询"
ClientHeight = 4935
ClientLeft = 60
ClientTop = 345
ClientWidth = 6480
LinkTopic = "Form1"
ScaleHeight = 4935
ScaleWidth = 6480
StartUpPosition = 3 '窗口缺省
Begin VB.TextBox txtSQL
Appearance = 0 'Flat
Height = 855
Left = 480
MultiLine = -1 'True
TabIndex = 14
Text = "数据库_通用F5.frx":0000
Top = 3960
Width = 5535
End
Begin VB.ListBox lstFDName2
Appearance = 0 'Flat
Height = 2190
Left = 4800
TabIndex = 12
Top = 1200
Width = 1215
End
Begin VB.ListBox lstTDName2
Appearance = 0 'Flat
Height = 2190
Left = 3360
TabIndex = 11
Top = 1200
Width = 1215
End
Begin VB.ListBox lstFDName1
Appearance = 0 'Flat
Height = 2190
Left = 1920
TabIndex = 10
Top = 1200
Width = 1215
End
Begin VB.ListBox lstTDName1
Appearance = 0 'Flat
Height = 2190
Left = 480
TabIndex = 9
Top = 1200
Width = 1215
End
Begin VB.CommandButton cmdExit
Caption = "退 出"
Height = 375
Left = 4560
TabIndex = 4
Top = 240
Width = 1455
End
Begin VB.CommandButton cmdSQL
Caption = "查 询"
Height = 375
Left = 2880
TabIndex = 3
Top = 240
Width = 1455
End
Begin VB.Frame fraTDNumber
Appearance = 0 'Flat
BackColor = &H80000005&
Caption = "选择查询表的个数"
ForeColor = &H80000008&
Height = 735
Left = 480
TabIndex = 0
Top = 120
Width = 1935
Begin VB.OptionButton OptTwo
Appearance = 0 'Flat
BackColor = &H80000005&
Caption = "双表"
ForeColor = &H80000008&
Height = 375
Left = 1080
TabIndex = 2
Top = 240
Width = 735
End
Begin VB.OptionButton OptOne
Appearance = 0 'Flat
BackColor = &H80000005&
Caption = "单表"
ForeColor = &H80000008&
Height = 375
Left = 240
TabIndex = 1
Top = 240
Value = -1 'True
Width = 735
End
End
Begin VB.Label lblNotice2
Appearance = 0 'Flat
AutoSize = -1 'True
BackColor = &H80000005&
BorderStyle = 1 'Fixed Single
ForeColor = &H80000008&
Height = 210
Left = 480
TabIndex = 15
Top = 3720
Width = 120
End
Begin VB.Label lblNotice1
Appearance = 0 'Flat
AutoSize = -1 'True
BackColor = &H80000005&
BorderStyle = 1 'Fixed Single
ForeColor = &H80000008&
Height = 210
Left = 480
TabIndex = 13
Top = 3480
Width = 120
End
Begin VB.Label lblFDName2
Alignment = 2 'Center
Appearance = 0 'Flat
BackColor = &H80000005&
Caption = "字段表2"
ForeColor = &H80000008&
Height = 255
Left = 4800
TabIndex = 8
Top = 960
Width = 1215
End
Begin VB.Label lblTDName2
Alignment = 2 'Center
Appearance = 0 'Flat
BackColor = &H80000005&
Caption = "查询表2"
ForeColor = &H80000008&
Height = 255
Left = 3360
TabIndex = 7
Top = 960
Width = 1215
End
Begin VB.Label lblFDName1
Alignment = 2 'Center
Appearance = 0 'Flat
BackColor = &H80000005&
Caption = "字段表1"
ForeColor = &H80000008&
Height = 255
Left = 1920
TabIndex = 6
Top = 960
Width = 1215
End
Begin VB.Label lblTDName1
Alignment = 2 'Center
Appearance = 0 'Flat
BackColor = &H80000005&
Caption = "查询表1"
ForeColor = &H80000008&
Height = 255
Left = 480
TabIndex = 5
Top = 960
Width = 1215
End
End
Attribute VB_Name = "frmSQL"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
'窗体frmSQL
'SQL查询
Option Explicit
Dim strTDName1 As String, strTDName2 As String
Dim td1 As TableDef, td2 As TableDef
Private Sub Form_Load()
lblTDName1.Visible = True '指示查询表1的标签
lstTDName1.Visible = True '查询表1的列表框
lblTDName2.Visible = False '指示查询表2的标签
lstTDName2.Visible = False '查询表2的列表框
lblFDName1.Visible = False '指示字段表1的标签
lstFDName1.Visible = False '字段表1的列表框
lblFDName2.Visible = False '指示字段表2的标签
lstFDName2.Visible = False '字段表2的列表框
lblNotice1.Visible = False
lblNotice2.Visible = False
cmdSQL.Visible = False '查询按钮
txtSQL.Visible = False '保存SQL语句的文本框
'在列表框1显示数据表
For Each td In db.TableDefs
If (td.Attributes And dbSystemObject) = 0 Then '甩掉系统表
If (td.Attributes dbAttachedTable) Then '甩掉附属表
lstTDName1.AddItem td.Name '用户表进入列表框
End If
End If
Next
End Sub
'单击“单表”单选钮事件
Private Sub OptOne_Click()
lblTDName1.Visible = True '指示查询表1的标签
lstTDName1.Visible = True '查询表1的列表框
lblTDName2.Visible = False '指示查询表2的标签
lstTDName2.Visible = False '查询表2的列表框
lblFDName1.Visible = False '指示字段表1的标签
lstFDName1.Visible = False '字段表1的列表框
lblFDName2.Visible = False '指示字段表2的标签
lstFDName2.Visible = False '字段表2的列表框
End Sub
'单击“双表”单选钮事件
Private Sub OptTwo_Click()
lblTDName2.Visible = True '指示查询表2的标签
lstTDName2.Visible = True '查询表2的列表框
lblFDName1.Visible = False '指示字段表1的标签
lstFDName1.Visible = False '字段表1的列表框
lblFDName2.Visible = False '指示字段表2的标签
lstFDName2.Visible = False '字段表2的列表框
lstTDName2.Clear
'在列表框2显示数据表
For Each td In db.TableDefs
If (td.Attributes And dbSystemObject) = 0 Then '甩掉系统表
If (td.Attributes dbAttachedTable) Then '甩掉附属表
lstTDName2.AddItem td.Name '用户表进入列表框
End If
End If
Next
End Sub
'单击列表框1事件
Private Sub lstTDName1_Click()
lblFDName1.Visible = True '指示字段表1的标签
lstFDName1.Visible = True '字段表1的列表框
strTDName1 = lstTDName1 '从选中的列表项取得原表名1
lstFDName1.Clear '清除列表框
Set td1 = db.TableDefs(strTDName1) '打开原数据表1
For Each fd In td1.Fields '在列表框中列出原数据表1的字段名
lstFDName1.AddItem fd.Name
Next
cmdSQL.Visible = True
txtSQL.Visible = True
lblNotice1.Visible = True
lblNotice1.Caption = "参考上面所列出的字段在下面的文本框中键入SQL语句"
lblNotice2.Visible = True
lblNotice2.Caption = "在键入SQL语句时不能使用断句符换行，用箭头键即可"
End Sub
'单击列表框2事件
Private Sub lstTDName2_Click()
lblFDName2.Visible = True '指示字段表2的标签
lstFDName2.Visible = True '字段表2的列表框
strTDName2 = lstTDName2 '从选中的列表项取得原表名2
lstFDName2.Clear '清除列表框
Set td2 = db.TableDefs(strTDName2) '打开原数据表2
For Each fd In td2.Fields '在列表框中列出原数据表2的字段名
lstFDName2.AddItem fd.Name
Next
End Sub
'执行SQL查询
Private Sub cmdSQL_Click()
'在键入SQL语句时不能加入断句符，用箭头键换行即可
Dim strSQL As String
strSQL = txtSQL.Text '从SQL文本框取得SQL语句
db.Execute (strSQL) '执行SQL查询
lblNotice1.Caption = "保存查询结果的新表已经建成，" & _
"可以用“记录集”的“显示”浏览"
lblNotice2.Visible = False
End Sub
'退出
Private Sub cmdExit_Click()
Unload Me
Load frmDatabase
frmDatabase.Visible = True
End Sub
