#sql多表查询#
SELECT *
FROM sp_blog,sp_aboutme,sp_user,sp_info
WHERE
sp_aboutme.user_id=sp_user.user_id
AND sp_info.info_state=1
AND sp_info.user_id=sp_aboutme.user_id
AND sp_info.user_id=sp_user.user_id
AND sp_info.user_id=sp_blog.user_id
AND sp_blog.user_id=sp_aboutme.user_id
AND sp_blog.user_id=sp_user.user_id
AND sp_blog.blog_tj=1
AND sp_blog.blog_cg=0
AND sp_blog.blog_default=0
ORDER BY blog_time DESC LIMIT $pagen2,$page_sizen2