sql = "select top 12 adlinkid ,LEFT(atitle, 15) AS atitle from t8_ad where asortname='打折'and abs='1'and adel='1' order by asdate desc";
DBClass.BindDataList(sql, DataList1);
sql = "select top 12 nlinkid ,LEFT(ntitle, 13) AS ntitle from t8_news order by ndate desc";
DBClass.BindDataList(sql, DataList2);
sql = "select top 12 adlinkid ,LEFT(atitle, 13) AS atitle,asortname from t8_ad where abs='1'and adel='1'and asortname!='打折' order by asdate desc";
DBClass.BindDataList(sql, DataList3);
sql = "select top 12 comid,left(ccname,13) as ccname from t8_company order by csdate desc ";
DBClass.BindDataList(sql, DataList4);

可能跟我解释一下，具体什么意思啊　！