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}