本節課大綱： 一、普通查詢方式a、字符串$arr=$m->where("sex=0 and username='gege'")->find();b、數組$data['sex']=0;$data['username']='gege';$arr=$m->where($data)->find();注意：這種方式默認是and的關系，如果使用or關系，需要添加數組值$data['sex']=0;$data['username']='gege';$data['_logic']='or';二、表達式查詢方式$data['id']=array('lt',6);$arr=$m->where($data)->select();EQ 等于NEQ不等于GT 大于EGT大于等于LT 小于ELT小于等于LIKE 模糊查詢$data['username']=array('like','%ge');$arr=$m->where($data)->select();NOTLIKE$data['username']=array('notlike','%ge%'); //notlike中間沒有空格$arr=$m->where($data)->select();注意：如果一個字段要匹配多個通配符$data['username']=array('like',array('%ge%','%2%','%五%'),'and');//如果沒有第三個值，默認關系是or關系$arr=$m->where($data)->select();BETWEEN$data['id']=array('between',array(5,7));$arr=$m->where($data)->select();//SELECT * FROM `tp_user` WHERE ( (`id` BETWEEN 5 AND 7 ) )$data['id']=array('not between',array(5,7));//注意，not 和 between中間一定要有空格$arr=$m->where($data)->select();IN$data['id']=array('in',array(4,6,7));$arr=$m->where($data)->select();//SELECT * FROM `tp_user` WHERE ( `id` IN (4,6,7) )$data['id']=array('not in',array(4,6,7));$arr=$m->where($data)->select();//SELECT * FROM `tp_user` WHERE ( `id` NOT IN (4,6,7) ) 三、區間查詢 四、統計查詢 五、SQL直接查詢/************一、普通查詢方式1.使用字符串方式查詢id=1的數據public function show(){$m=M('user');$var=$m->where('id=1')->getField('username');#$this->show("歡迎你.$_GET[name].'你的年齡是'.$_GET[age]");echo $var;public function show(){$m=M('user');$arr=$m->where('username="gege" and sex=1')->select();#$this->show("歡迎你.$_GET[name].'你的年齡是'.$_GET[age]");var_dump($arr);$this->display(); 拼接成的SQL:SELECT * FROM `user` WHERE ( username="gege" and sex=1 ) [ RunTime:0.008743s ]或者:public function show(){$m=M('user');$arr=$m->where("username='gege' and sex=1")->select();#$this->show("歡迎你.$_GET[name].'你的年齡是'.$_GET[age]");var_dump($arr);$this->display(); }SELECT * FROM `user` WHERE ( username='gege' and sex=1 ) [ RunTime:0.009251s ]2.使用數組方式；public function show(){$m=M('user');#$arr=$m->where("username='gege' and sex=1")->select();#$this->show("歡迎你.$_GET[name].'你的年齡是'.$_GET[age]");#var_dump($arr);$data['username']='gege';$data['sex']=1;var_dump ($m->where($data)->select());$this->display();拼接成的SQL:SELECT * FROM `user` WHERE ( `username` = 'gege' ) AND ( `sex` = 1 ) [ RunTime:0.008914s ]注意:默認條件是and邏輯運算符:public function show(){$m=M('user');#$arr=$m->where("id<10")->select();#$this->show("歡迎你.$_GET[name].'你的年齡是'.$_GET[age]");#var_dump($arr);$data['username']='gege';$data['sex']=1;$data['_logic']='or';var_dump ($m->where($data)->select());$this->display(); } }查詢id>60:public function show(){$m=M('user');$arr=$m->where("id>60")->select();#$this->show("歡迎你.$_GET[name].'你的年齡是'.$_GET[age]");var_dump($arr);// $data['username']='gege';// $data['sex']=1;// $data['_logic']='or';#var_dump ($m->where($data)->select());$this->display(); }拼接成的SQL:SELECT * FROM `user` WHERE ( id>60 ) [ RunTime:0.007781s ]public function show(){$m=M('user');// $arr=$m->where("id>60")->select();// #$this->show("歡迎你.$_GET[name].'你的年齡是'.$_GET[age]");// var_dump($arr);// $data['username']='gege';// $data['sex']=1;$data['id']=array('GT',60);// $data['_logic']='or';var_dump ($m->where($data)->select());$this->display();SELECT * FROM `user` WHERE ( `id` > 60 ) [ RunTime:0.007851s ]不等于；拼接SQL:public function show(){$m=M('user');$arr=$m->where('username not like "%ge%"')->select();// #$this->show("歡迎你.$_GET[name].'你的年齡是'.$_GET[age]");var_dump($arr);// $data['username']='gege';// $data['sex']=1;// $data['id']=array('LT',60);//$data['_logic']='or';// var_dump ($m->where($data)->select());$this->display(); }SELECT * FROM `user` WHERE ( username not like "%ge%" ) [ RunTime:0.008588s ]或者:public function show(){$m=M('user');$arr=$m->where('username like "%ge%"')->select();// #$this->show("歡迎你.$_GET[name].'你的年齡是'.$_GET[age]");#$var_dump($arr);// $data['username']='gege';// $data['sex']=1;// $data['id']=array('LT',60);//$data['_logic']='or';$data['username']=array('like','%ge');var_dump ($m->where($data)->select());$this->display(); }SELECT * FROM `user` WHERE ( `username` LIKE '%ge' ) [ RunTime:0.017041s ]not like:public function show(){$m=M('user');$arr=$m->where('username like "%ge%"')->select();// #$this->show("歡迎你.$_GET[name].'你的年齡是'.$_GET[age]");#$var_dump($arr);// $data['username']='gege';// $data['sex']=1;// $data['id']=array('LT',60);//$data['_logic']='or';$data['username']=array('notlike','%ge');var_dump ($m->where($data)->select());$this->display(); 查詢一個區間:public function show(){$m=M('user');$arr=$m->where("id between 30 and 40")->select();// #$this->show("歡迎你.$_GET[name].'你的年齡是'.$_GET[age]");var_dump($arr);// $data['username']='gege';// $data['sex']=1;// $data['id']=array('LT',60);//$data['_logic']='or';#$data['username']=array('notlike','%ge');#var_dump ($m->where($data)->select());$this->display(); 拼接成的SQL:SELECT * FROM `user` WHERE ( id between 30 and 40 ) [ RunTime:0.008523s ]多個匹配；public function show(){$m=M('user');$arr=$m->where(" USERNAME LIKE '%ge%' OR USERNAME LIKE '%2%' OR USERNAME LIKE '%五%'")->select();// #$this->show("歡迎你.$_GET[name].'你的年齡是'.$_GET[age]");var_dump($arr);// $data['username']='gege';// $data['sex']=1;// $data['id']=array('LT',60);//$data['_logic']='or';#$data['username']=array('notlike','%ge');#var_dump ($m->where($data)->select());$this->display(); }SELECT * FROM `user` WHERE ( USERNAME LIKE '%ge%' OR USERNAME LIKE '%2%' OR USERNAME LIKE '%五%' ) [ RunTime:0.009395s ]in查詢:public function show(){$m=M('user');$arr=$m->where(" id in (1,31,42)")->select();// #$this->show("歡迎你.$_GET[name].'你的年齡是'.$_GET[age]");var_dump($arr);// $data['username']='gege';// $data['sex']=1;// $data['id']=array('LT',60);//$data['_logic']='or';#$data['username']=array('notlike','%ge');#var_dump ($m->where($data)->select());$this->display(); }SELECT * FROM `user` WHERE ( id in (1,31,42) ) [ RunTime:0.008024s ]

轉載于:https://www.cnblogs.com/zhaoyangjian724/p/6199709.html

與50位技術專家面對面20年技術見證，附贈技術全景圖

總結

以上是生活随笔為你收集整理的查询方式的一般使用1的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。