谁能给我详细讲解一下这个语句是什么意思？我明白了，就给分！
sql="select * from info where showname like '%"&request("txtitle")&"%' and type like '%"&request("type")&"%' and sortid="+cstr(sortid)+" and typeid="&request("typeid")&" order by dateandtime desc"
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