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();