SQL怎样用update更新多个数据?

sql = "update stafaddressinf set "
sql = sql & "companytel=" & SqlStr(request("companytel")) & ", "
sql = sql & "fax=" & SqlStr(request("fax")) & ", "
sql = sql & "hometel=" & SqlStr(request("hometel")) & ", "
sql = sql & "homeaddress=" & SqlStr(request("homeaddress")) & ", "
sql = sql & "postcard=" & SqlStr(request("postcard")) & ", "
sql = sql & "sex=" & SqlStr(request("sex")) & ", "
sql = sql & "handset=" & SqlStr(request("handset")) & ", "
sql = sql & "callset=" & SqlStr(request("callset")) & ", "
sql = sql & "remark=" & SqlStr(request("remark")) & ", "
sql = sql & "email=" & SqlStr(request("email")) & " where username=" & sq