这是我调用全站更新的源代码，一共调用8个表的更新，有兴趣的可以加以改进

本文介绍了一个复杂的SQL查询案例，通过联合多个表来获取最新的记录条目。涉及的技术包括使用union进行多表选择、按时间排序以及限制返回结果的数量。

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[e:loop={'select * from (
select id,classid,titleurl,filename,title,newstime,titlepic from phome_ecms_book where newstime union
select id,classid,titleurl,filename,title,newstime,titlepic from phome_ecms_course where newstime union
select id,classid,titleurl,filename,title,newstime,titlepic from phome_ecms_soft where newstime union
select id,classid,titleurl,filename,title,newstime,titlepic from phome_ecms_game where newstime union
select id,classid,titleurl,filename,title,newstime,titlepic from phome_ecms_js where newstime union
select id,classid,titleurl,filename,title,newstime,titlepic from phome_ecms_templet where newstime union
select id,classid,titleurl,filename,title,newstime,titlepic from phome_ecms_mv where newstime union
select id,classid,titleurl,filename,title,newstime,titlepic from phome_ecms_news where newstime) a order by newstime desc limit 7',7,24,0}]
<li><b><?=$bqno?></b><div><a href="<?=$bqsr[classurl]?>" target="_blank">[<?=$bqsr[classname]?>]</a></div><a href="<?=$bqsr['titleurl']?>" class="gxone" target="_blank"><?=$bqr['title']?></a></li>
[/e:loop]