幫我解釋一個(gè)這段ASP代碼：

沒(méi)看懂，糾結(jié)

看懂一半，我也挺糾結(jié)...

該段代碼是讀取某一條留言?xún)?nèi)容的數(shù)據(jù)庫(kù)連接
<%
Dim Recordset1__MMColParam
Recordset1__MMColParam = "1"
If (Request.QueryString("Id") <> "") Then
Recordset1__MMColParam = Request.QueryString("Id")
End If
%> '獲取留言ID，如果為空，則為1

<%
Dim Recordset1
Dim Recordset1_numRows

Set Recordset1 = Server.CreateObject("ADODB.Recordset") '新建記錄集
Recordset1.ActiveConnection = MM_conn_STRING '設(shè)置記錄集的數(shù)據(jù)庫(kù)連接字符串
Recordset1.Source = "SELECT * FROM dbo.liuyan WHERE Id = " + Replace(Recordset1__MMColParam, "'", "''") + "" '設(shè)置記錄集查詢(xún)字符串，按照ID從留言表中讀取所有字段, 其中有個(gè)對(duì)ID進(jìn)行替換，把id中'換為''
Recordset1.CursorType = 0 '設(shè)置記錄集游標(biāo)類(lèi)型
Recordset1.CursorLocation = 3 '設(shè)置游標(biāo)所在位置
Recordset1.LockType = 1 '設(shè)置讀取該條記錄時(shí)，其他記錄鎖定類(lèi)型
Recordset1.Open() '打開(kāi)記錄集

Recordset1_numRows = 0
%>