yu2n

使用 rs.RecordCount

set cn=WScript.CreateObject("ADODB.Connection")
set rs=WScript.CreateObject("adodb.recordset")
cn.open "Provider=Microsoft.Jet.OLEDB.4.0;Persist Security Info=False;Data Source=\\win-pc\meno\vbs\ceshi.mdb"
sql="select MacAddress From speed where macaddress = '7'"
rs.CursorLocation = 3
rs.open sql,Cn,1,3
if rs.RecordCount > 0 Then
    msgbox "有相同数据"
else
    msgbox "无此数据"
end if
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yu2n

回复 7# 437153


我这里没有这个问题。
（测试环境：win8.1 x64 + office2007）

参考：Win7 上不能用 microsoft.jet.oledb.4.0
http://www.vbgood.com/thread-102510-1-1.html

yu2n

回复 10# 437153

sql = "select MacAddress Form speed where MacAddress = '" & MacAddr &  "'"
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附：
VB/VBS语句中，字符串需要用一对英文"双"引号包含起来，例如：

Msgbox " Hello World ! "
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SQL查询语句中，字符串需要用一对英文'单'引号包含起来，例如：

select ' hello world! '
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yu2n

回复 12# 437153
如果你想要Msgbox弹出如下内容的提示框：

" select MacAddress From speed where macaddress = 'mac=14:CF:92:1B:1D:52' "
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你可以这么写Msgbox语句（注意英文双引号的写法有3种）：

str01 = """ select MacAddress From speed where macaddress = 'mac=14:CF:92:1B:1D:52' """
str02 = """" & " select MacAddress From speed where macaddress = 'mac=14:CF:92:1B:1D:52' " & """"
str03 = Chr(34) & " select MacAddress From speed where macaddress = 'mac=14:CF:92:1B:1D:52' " & Chr(34)
Msgbox str01
Msgbox str02
Msgbox str03
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结果都是同样的。