ThinkPhp学习08

原文:ThinkPhp学习08

一、普通查询方式

a、字符串

　　$arr=$m->where("sex=0 and username='gege'")->find();

b、数组

　　

 //    2.SELECT * FROM `tp_user` WHERE ( `sex` = 0 ) AND ( `username` = '李明2' )
         $data['sex']=0;
         $data['username']='李明2';
         $arr=$m->where($data)->find();
         var_dump('$arr');
         $this->display();

find()只能查询一条，查询多条用select();

注意：这种方式默认是and的关系，如果使用or关系，需要添加数组值  $data['_logic']='or';

 //    2.SELECT * FROM `tp_user` WHERE ( `sex` = 0 ) AND ( `username` = '李明2' )
         $data['sex']=0;
         $data['username']='李明2';
         $data['_logic']='or';
         $arr=$m->where($data)->find();
         var_dump('$arr');
         $this->display();

二、表达式查询方式

$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

     //2.SELECT * FROM `tp_user` WHERE ( `id` < 6 )
         $data['id']=array('lt',6);
         $arr=$m->where($data)->select();   

LIKE 模糊查询    $data['username']=array('like','%ge');    $arr=$m->where($data)->select();

NOTLIKE    $data['username']=array('notlike','%ge%'); //notlike中间没有空格       $arr=$m->where($data)->select();

 2.SELECT * FROM `tp_user` WHERE ( `username` LIKE '%李%' )
         $data['username']=array('like','%李%');
         $arr=$m->where($data)->select();   

注意：如果一个字段要匹配多个通配符    $data['username']=array('like',array('%ge%','%2%','%五%'),'and');//如果没有第三个值，默认关系是or关系

$arr=$m->where($data)->select();

 //2.SELECT * FROM `tp_user` WHERE ( (`username` LIKE '%李%' OR `username` LIKE '%2%') )
         //$arr= $data['username']=array('like',array('%李%','%2%'));//
       //2.SELECT * FROM `tp_user` WHERE ( (`username` LIKE '%李%' AND `username` LIKE '%2%') )
         $arr= $data['username']=array('like',array('%李%','%2%'),'and');//
         $arr=$m->where($data)->select();   

         var_dump($arr);

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中间一定要有空格

 //2.SELECT * FROM `tp_user` WHERE ( (`id` BETWEEN 1 AND 7 ) )
     //    $data['id']=array('between',array(1,7));
     //SELECT * FROM `tp_user` WHERE ( (`id` NOT BETWEEN 1 AND 7 ) )
     $data['id']=array('not between',array(1,7));
         $arr=$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) )

 //2.SELECT * FROM `tp_user` WHERE ( `id` IN (1,7) )
         //$data['id']=array('in',array(1,7));
         //2.SELECT * FROM `tp_user` WHERE ( `id` NOT IN (1,7) )
         $data['id']=array('not in',array(1,7));
         $arr=$m->where($data)->select();