DB::query("SELECT COUNT(*) FROM ". DB::table('vgallerys')." where uid IN (SELECT
pre_home_friend.fuid FROM pre_home_friend WHERE uid = '$discuz_uid') and album=0");
这句话的意思看不懂，求解。。。。。。。希望好心人帮助
------解决方案--------------------
就是返回符合条件的记录有多少条.
输出 sql 你就知道完整的内容是什么了.
echo "SELECT COUNT(*) FROM ". DB::table('vgallerys')." where uid IN (SELECT
pre_home_friend.fuid FROM pre_home_friend WHERE uid = '$discuz_uid') and album=0";
------解决方案--------------------
找到vgallerys这个表中满足uid在“pre_home_friend这个表中uid等于$discuz_uid”范围内并且album=0的记录的总条数