Excel 中怎么用VBA 删除指定文件夹中的指定文件?

你在EXCEL中增加一个列名为ID,后在VBA中写以下代码，并引用Microsoft ActiveX Data Objects 2.8后执行

Public Sub 写入SQL2008()
Dim cnn As New ADODB.Connection
Dim SQL As String, mydata As String, mytable As String
Dim i%
mydata = "KKKK" '指定要修改的数据库
mytable = "aaaa" '指定数据表

'建立与指定SQL Server数据库的连接
cnn.ConnectionString = "Provider=SQLOLEDB;" _
& "User ID=sa;" _ 'sa改成你SQL账号(通常不用改)
& "Password =123;" _ '123改成你SQL2008密码
& "Data Source=sowin;" _ 'sowin改成你的SQL2008的电脑名,
'如sql2008在网络上，则sowin改成IP地址(如192.168.0.1)
& "Initial Catalog =" & mydata
cnn.Open
'查询全表某些字段的记录
for i = 2 to [a65536].end(xlup).row
SQL = "UPDATE " & mytable & " SET x=" & cells(i,1) & "," & _
"y=" & cells(i,2) & "," & _
"z=" & cells(i,3) & "," & _
"where id=11"
next i
'注意引号里面的空格
'数据库没有更新的数据则用INSERT INTO
'SQL = "INSERT INTO " & mytable & " COLUMNS(x,y,z)" & _
" VALUES('" & CELLS(i,1) & "','" & cells(i,2) & "','" & cells(i,3) &"')"

cnn.Execute(SQL)

cnn.Close
Set cnn = Nothing
End Sub

要通过EXCEL查询指定数据库中的含 有指定字段的表名时，首先得知道查询SQL，查询SQL如下：
SELECT TABLE_NAME FROM INFORMATION_SCHEMA.COLUMNS where COLUMN_NAME='字段名'
如果要写成VBA的话，下面给你一段我写的宏，测试过了：
－－－－－－－－－－－
Sub 宏7()
' 宏7 宏
Application.CutCopyMode = False
With ActiveSheet.ListObjects.Add(SourceType:=0, Source:= _
"ODBC;DRIVER=SQL Server;SERVER=服务器IP;UID=sa;;APP=Microsoft Office 2016;WSID=GUESS;DATABASE=要查询的数据库名" _
, Destination:=Range("$A$1")).QueryTable
.CommandType = xlCmdSql
.CommandText = Array( _
"SELECT TABLE_NAME" & Chr(13) & "" & Chr(10) & "FROM 要查询的数据库名.INFORMATION_SCHEMA.COLUMNS" & Chr(13) & "" & Chr(10) & "WHERE (COLUMN_NAME='要查询的字段名')")
.RowNumbers = False
.FillAdjacentFormulas = False
.PreserveFormatting = True
.RefreshOnFileOpen = False
.BackgroundQuery = True
.RefreshStyle = xlInsertDeleteCells
.SavePassword = False
.SaveData = True
.AdjustColumnWidth = True
.RefreshPeriod = 0
.PreserveColumnInfo = True
Dim chars As String
Dim rndstr As String
chars = "ABCDEFGHJKLMNPQRSTUVWXYZ0123456789"
Randomize
For i = 1 To 6
rndstr = rndstr & Mid(chars, Int(Rnd() * Len(chars) + 1), 1)
Next
.ListObject.DisplayName = rndstr
.Refresh BackgroundQuery:=False
End With
End Sub
最后结果如下图：

为什么不用openrowset或者opendatasource?