ThinkPHP的查询语句与关联查询的用法

$User = M("User"); //实例化User对象
$condition['name'] = 'thinkphp'; // 把查询条件传入查询方法
$User->where($condition)->select();

$User = M("User"); // 实例化User对象
// 定义查询条件 $condition = new stdClass();
$condition->name = 'thinkphp';  // 查询name的值为thinkphp的记录
$User->where($condition)->select(); //  上面的查询条件等同于 where('name="thinkphp"') 使用对象方式查询和使用数组查询的效果是相同的，并且是可
带where条件的普通查询

$user=M('user');
$list=$user->where('id>5 and id<9')->select();
$list=$user->where($data)->select();

$user=M('user');
$list=$user->where(array('username'=>'www.jb51.net'))->select();
$list=$user->where($data)->select();

$user=M('user');
$a=new stdClass();
$a->username='www.jb51.net;
$list=$user->where($a)->select();

$M_shopping = M('Shops'); 
$M_product = M('Product'); 
$list_shops = $M_shopping->join('as shops left join hr_product as product on shops.product_id = product.p_id') 
->field('product.p_id,product.p_name,shops.product_amount,shops.product_id') 
->where("shops.user_cookie='".$_COOKIE['hr_think_userid']."'") 
->group('shops.id') 
->select();

$user=M('user');
$data['id']=array(array('gt',20),array('lt',23),'and');
$list=$user->where($data)->select();

$user=M('user');
$data['username']='pengyanjie';
$data['password']=array('eq','pengyanjie');
$data['id']=array('lt',30);
$data['_logic']='or';
$list=$user->where($data)->select();
dump($list);

$user=M('user');
$data['username']=array('eq','pengyanjie');
$data['password']=array('like','p%');
$data['_logic']='or';
$where['_complex']=$where;
$where['id']=array('lt',30);
$list=$user->where($data)->select();

$M_shopping = M('Shops');
$M_product = M('Product');
$M_proimg = M('Product_image');
$list_shops = $M_shopping->join('as shops left join hr_product as product on shops.product_id = product.p_id left join
hr_product_image as productimgon productimg.p_id = product.p_id')->fiel('productimg.pi_url,product.p_id,product.p_name,shops.product_amount,shops.product_id,product.am_id,
product.p_procolor,product.p_price,product_amount*p_price as totalone')->where("shops.user_cookie='".$_COOKIE['hr_think_userid']."'")
->group('shops.id')->select();

$m_test = M("Product");
$productmeaage = $m_test->where("p_id='$proid'")->select();

$M_product = M('Product');
$map['pid'] = $proid;
$p_result = $M_product->where($map)->select();