本文實(shí)例講述了ThinkPHP查詢語句與關(guān)聯(lián)查詢用法。分享給大家供大家參考。具體如下：
在thinkphp框架頁面中我們可以直接拼寫sql查詢語句來實(shí)現(xiàn)數(shù)據(jù)庫查詢讀寫操作，下面就對此加以實(shí)例說明。
普通查詢除了字符串查詢條件外，數(shù)組和對象方式的查詢條件是非常常用的，這些是基本查詢所必須掌握的。
一、使用數(shù)組作為查詢條件
復(fù)制代碼代碼如下:
$User = M("User"); //實(shí)例化User對象
$condition['name'] = 'thinkphp'; // 把查詢條件傳入查詢方法
$User->where($condition)->select();
二、使用對象方式來查詢 可以使用任何對象 這里以stdClass內(nèi)置對象為例
復(fù)制代碼代碼如下:
$User = M("User"); // 實(shí)例化User對象
// 定義查詢條件 $condition = new stdClass();
$condition->name = 'thinkphp'; // 查詢name的值為thinkphp的記錄
$User->where($condition)->select(); // 上面的查詢條件等同于 where('name="thinkphp"') 使用對象方式查詢和使用數(shù)組查詢的效果是相同的，并且是可
// 定義查詢條件 $condition = new stdClass();
$condition->name = 'thinkphp'; // 查詢name的值為thinkphp的記錄
$User->where($condition)->select(); // 上面的查詢條件等同于 where('name="thinkphp"') 使用對象方式查詢和使用數(shù)組查詢的效果是相同的，并且是可
帶where條件的普通查詢
1、字符串形式
復(fù)制代碼代碼如下:
$user=M('user');
$list=$user->where('id>5 and id<9')->select();
$list=$user->where($data)->select();
$list=$user->where('id>5 and id<9')->select();
$list=$user->where($data)->select();
2、數(shù)組形式
復(fù)制代碼代碼如下:
$user=M('user');
$list=$user->where(array('username'=>'m.survivalescaperooms.com'))->select();
$list=$user->where($data)->select();
$list=$user->where(array('username'=>'m.survivalescaperooms.com'))->select();
$list=$user->where($data)->select();
3、對象形式
復(fù)制代碼代碼如下:
$user=M('user');
$a=new stdClass();
$a->username='m.survivalescaperooms.com;
$list=$user->where($a)->select();
$a=new stdClass();
$a->username='m.survivalescaperooms.com;
$list=$user->where($a)->select();
兩個表的關(guān)聯(lián)查詢：
復(fù)制代碼代碼如下:
$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();
$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();
區(qū)間查詢
復(fù)制代碼代碼如下:
$user=M('user');
$data['id']=array(array('gt',20),array('lt',23),'and');
$list=$user->where($data)->select();
$data['id']=array(array('gt',20),array('lt',23),'and');
$list=$user->where($data)->select();
組合查詢
復(fù)制代碼代碼如下:
$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);
$data['username']='pengyanjie';
$data['password']=array('eq','pengyanjie');
$data['id']=array('lt',30);
$data['_logic']='or';
$list=$user->where($data)->select();
dump($list);
復(fù)合查詢
復(fù)制代碼代碼如下:
$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();
$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();
三個數(shù)據(jù)表的關(guān)聯(lián)查詢
復(fù)制代碼代碼如下:
$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_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();
數(shù)據(jù)表的查詢條件
① 下面的是直接吧查詢的條件放到了where中，這樣就方便了條件的書寫
復(fù)制代碼代碼如下:
$m_test = M("Product");
$productmeaage = $m_test->where("p_id='$proid'")->select();
$productmeaage = $m_test->where("p_id='$proid'")->select();
② 除了上面的方法還有一種是以數(shù)組的方式
復(fù)制代碼代碼如下:
$M_product = M('Product');
$map['pid'] = $proid;
$p_result = $M_product->where($map)->select();
$map['pid'] = $proid;
$p_result = $M_product->where($map)->select();
希望本文所述對大家的ThinkPHP框架程序設(shè)計有所幫助。
