在vb编程中怎样查询sql数据库中某一个区间的数据并把记录条数返回给vb程序的变量

Private RecSet1 As New Recordset
Dim sSql As String

sSql = " SELECT FROM Table WHERE MainID='" & MainID & "'" & _
" UNION " & _
" SELECT MainID, Name, VipID, Sex, Birth, MPhone, Phone, Addr, BDate, CardID, BCoID, BPosID, UmType, UmDiscount, UpdateTime,State, CASE WHEN State=0 THEN '未提交' ELSE '已提交' END AS StateName FROM UserInfo WHERE MainId NOT IN(SELECT MainID FROM UserInfo2 WHERE MainID='" & MainID & "') AND MainID='" & MainID & "'"
If RecSet1State = adStateOpen Then RecSet1Close
RecSet1Open sSql, adoconn

If Not (RecSet1BOF) And Not (RecSet1EOF) Then
MetxtCusIdtext = MainID
MetxtCusNametext = Trim(RecSet1!Name) '会员姓名
MeTxtDeltext = Trim(RecSet1!UmDiscount) '折扣
Else
MetxtCusIdtext = ""
MetxtCusNametext = ""
MeTxtDeltext = "1"
End If

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