dedecms做网站的时候，用到的模版还原之后会带有数据。一般文章较多的话想一次性清空。手动删自然会慢很多，而且删掉之后，ID就会接着从最后一篇文章开始计数。
所以需要在SQL命令里执行以下代码：
系统——SQL命令工具——复制下面语句然后执行即可。
truncate table `dede_arctiny`;
truncate table `dede_archives`;
truncate table `dede_addonarticle`;
ALTER TABLE `dede_arctype` AUTO_INCREMENT =1;
delete from dede_addonarticle;
delete from dede_addonimages;
delete from dede_archives;
delete from dede_arctiny;
delete from dede_co_htmls;
delete from dede_co_urls;
delete from dede_co_mediaurls;
delete from dede_tagindex ;
delete from dede_taglist;
delete from dede_keywords;
TRUNCATE TABLE dede_archives;
ALTER TABLE `dede_archives` AUTO_INCREMENT =1;
ALTER TABLE `dede_arctiny` AUTO_INCREMENT =1;
ALTER TABLE `dede_addonarticle` AUTO_INCREMENT =1;
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