$image=mysql_query("select * from carad order by carAdID DESC LIMIT 10");
while($row=mysql_fetch_array($image))
{
$getimage=mysql_query("select * from carimage where carAdID='".$row["carAdID"]."' LIMIT 1");
while($getimagerow=mysql_fetch_array($getimage))
{
echo('');
echo('<a href="#" ><div class="simages"><img src="'.substr($getimagerow["carImageUrl"],1).'" width="600" height="400" /><div class="SliderContent">'.$row["catalogPrice"].'</div></div></a>');
}
}
我正在使用两个查询,一个是在循环之前,在while循环中,id来自第一个查询是否有任何最好的方法在单个查询中调用这些查询,因此它将进行优化。
答案 0 :(得分:0)
试试这个:
SELECT ci.*
FROM carimage ci
INNER JOIN
(
select *
from carad
order by carAdID DESC LIMIT 10
) c ON ci.carAdID = c.carAdID
--May be you need to add LIMIT here as well