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tp3.2原生sql拼接查询

//获取搜索结果
         $sql="SELECT* FROM `br_esf_village_price` p,(SELECT villageId,MAX(updateTime) max_time FROM br_esf_village_price GROUP BY villageId) as b,br_esf_village v WHERE p.villageId= b.villageId AND p.updateTime=b.max_time AND v.villageId = p.villageId ";
         if($condition['qy']){//区域
             $sql.="and fangAreaId = ".$condition['qy']."   ";
         }
         if($condition['qy']){//商圈
             $sql.="and fangTradingId = ".$condition['sq']."   ";
         }
         if($condition['jg'] ||$condition['zdyjg']){//价格
             $temp=array();
             $temp=$condition['zdyjg'] ? explode(",",$condition['zdyjg']) : explode(",",$condition['jg']);
             if(count($temp) ==2){
                 $sql.="and p.price >=".$temp[0]." and p.price <=".$temp[1]." ";
             }
         }
         if($condition['ll']){
         $temp=array();

         $temp= explode(",",$condition['ll']);

         if(count($temp) ==2){

             $temp[0] = date("Y",strtotime("-".$temp[1]." years"));//这里大的反而小,小的反而大

             $temp[1] = date("Y",strtotime("-".$temp[0]." years"));

             $sql.="and buildingYears >= ".$temp[0]."";

         }
         }
         if($condition['dt'] =='Y'){//地铁
             $sql.=" and hasMetro = 1";
         }


         if($order=='default'){
             $sql.=  "ORDER BY orderBy desc";
         }
         if($order=='pricedesc'){
             $sql.=  "ORDER BY  p.price desc";
         }
         if($order=='priceasc'){
             $sql.=  "ORDER BY  p.price asc";
         }

         $sql.=" limit$PageClass->firstRow,$PageClass->listRows";

         $data=$this->query($sql);

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