dedecms首页调用频道封面页、单页面{dede:field:content/}内

{dede:sql sql="SELECT content,substring(content,1,100) as content FROM dede_arctype where id=7"}
[field:content/]...
{/dede:sql}

{dede:sql sql='Select content from dede_arctype where id=1 '}
[field:content function='substr(@me,0,500)'/]
{/dede:sql}