分析一:
$res = M('member')
->table('__MEMBER__ as a')
->join('__ORDER__ as b')
->field('a.id,b.order_sn,count(b.id) as total')
->where('b.receive_member_id = a.id')
->group('a.id')
->order('total desc')
->limit($page->firstRow, $page->listRows)
->select();
1. res=M(′member′),res=M(′member′),res = M('member a') ,$res = M('member as a') 意思相同
2.res = M('member')->table('__MEMBER a') ,res = M('member')->table('__MEMBER a') ,res = M('member')->table('__MEMBER as a') 相同
分析二
$res = M('member_attest')
->table('__MEMBER_ATTEST__ a')
->join('__MEMBER__ b')
->join('__ORDER__ c')
->field('a.id,a.member_id,a.real_name,a.rank,b.mobile,count(c.id) as total')
->where('c.receive_member_id = b.id and b.id = a.member_id')->group('a.id')
->order('total desc')
->limit($page->firstRow, $page->listRows)
->select();
和
$res = M('member_attest')
->table('__MEMBER_ATTEST__ a')
->join('__MEMBER__ b ON b.id = a.member_id')
->join('__ORDER__ c')
->field('a.id,a.member_id,a.real_name,a.rank,b.mobile,count(c.id) as total')
->where('c.receive_member_id = b.id')->group('a.id')
->order('total desc')
->limit($page->firstRow, $page->listRows)
->select();
效果一样，join里面也可以不用带 on a.xx=b.xxx ,查询条件可以全部放到where里面
分析三
$res = M('member_attest')
->table('__MEMBER_ATTEST__ a,__MEMBER__ b')
->where('a.member_id = b.id')
->select();
$res = M('member_attest a')
->join('__MEMBER__ b')
->where('a.member_id = b.id')
->select();
$res = M('member_attest a')
->join('__MEMBER__ b ON a.member_id = b.id')
->select();
这三个都可以正常使用
