8.ThinkPHP 3.1.2 查询方式的一般使用1

1.获取所有数据:
 function show(){
		  $m=M('user');
		 $arr=$m->select();
	     var_dump($arr);
		 $this->display();
	 }
}

array (size=4)
  0 => 
    array (size=3)
      'id' => string '1' (length=1)
      'username' => string 'ztz2' (length=4)
      'sex' => string '0' (length=1)
  1 => 
    array (size=3)
      'id' => string '3' (length=1)
      'username' => string 'mm' (length=2)
      'sex' => string '0' (length=1)
  2 => 
    array (size=3)
      'id' => string '4' (length=1)
      'username' => string '9797' (length=4)
      'sex' => null
  3 => 
    array (size=3)
      'id' => string '5' (length=1)
      'username' => string 'tyty' (length=4)
      'sex' => string '0' (length=1)

访问show方法!!!

2.获取指定数据：

	 
	 function show(){
		  $m=M('user');
		 $arr=$m->find(3);
	     var_dump($arr);
		 $this->display();
	 }


array (size=3)
  'id' => string '3' (length=1)
  'username' => string 'mm' (length=2)
  'sex' => string '0' (length=1)

访问show方法!!!


3.获取指定id的username:

	 function show(){
		  $m=M('user');
		 $arr=$m->where('id=3')->getField('username');
	     var_dump($arr);
		 $this->display();

string 'mm' (length=2)

访问show方法!!!


4.where 条件查询:
 function show(){
		  $m=M('user');
		 $arr=$m->where("username='tyty' and sex=1")->find();
	     var_dump($arr);
		 $this->display();
	 }
}


array (size=3)
  'id' => string '6' (length=1)
  'username' => string 'tyty' (length=4)
  'sex' => string '1' (length=1)

访问show方法!!!




 SHOW COLUMNS FROM `user` [ RunTime:0.003398s ]
 SELECT * FROM `user` WHERE ( username='tyty' and sex=1 ) LIMIT 1 [ RunTime:0.001013s ]



5.使用数组的方式:

	 function show(){
		  $m=M('user');
		# $arr=$m->where("username='tyty' and sex=1")->find();
		$data['sex']=1;
		$data['username']='tyty';
		$arr=$m->where($data)->find();
	     var_dump($arr);
		 $this->display();


默认关系是AND:

    SHOW COLUMNS FROM `user` [ RunTime:0.003203s ]
    SELECT * FROM `user` WHERE ( `sex` = 1 ) AND ( `username` = 'tyty' ) LIMIT 1 [ RunTime:0.000931s ]


表示关系OR：

	 function show(){
		  $m=M('user');
		# $arr=$m->where("username='tyty' and sex=1")->find();
		$data['sex']=1;
		$data['username']='tyty';
		$data['_logic']='or';
		$arr=$m->where($data)->find();
	     var_dump($arr);
		 $this->display();



    SHOW COLUMNS FROM `user` [ RunTime:0.003388s ]
    SELECT * FROM `user` WHERE ( `sex` = 1 ) OR ( `username` = 'tyty' ) LIMIT 1 [ RunTime:0.000894s ]



二: 表达式查询方式:


	 function show(){
		  $m=M('user');
		# $arr=$m->where("username='tyty' and sex=1")->find();
		$data['id']=array('GT',3);
		#$data['username']='tyty';
		#$data['_logic']='or';
		$arr=$m->where($data)->find();
	     var_dump($arr);
		 $this->display();
	 }

id>3

	 
	 function show(){
		  $m=M('user');
		# $arr=$m->where("username='tyty' and sex=1")->find();
		$data['id']=array('GT',3);
		#$data['username']='tyty';
		#$data['_logic']='or';
		$arr=$m->where($data)->select();
	     var_dump($arr);
		 $this->display();
	 }
}

id<4

function show(){
		  $m=M('user');
		# $arr=$m->where("username='tyty' and sex=1")->find();
		$data['id']=array('ELT',4);
		#$data['username']='tyty';
		#$data['_logic']='or';
		$arr=$m->where($data)->select();
	     var_dump($arr);
		 $this->display();
	 }


模糊查询:
 function show(){
		  $m=M('user');
		# $arr=$m->where("username='tyty' and sex=1")->find();
		$data['username']=array('like','%ty%');
		#$data['username']='tyty';
		#$data['_logic']='or';
		$arr=$m->where($data)->select();
	     var_dump($arr);
		 $this->display();
	 }



取反:
 function show(){
		  $m=M('user');
		# $arr=$m->where("username='tyty' and sex=1")->find();
		$data['username']=array('notlike','%ty%');
		#$data['username']='tyty';
		#$data['_logic']='or';
		$arr=$m->where($data)->select();
	     var_dump($arr);
		 $this->display();
	 }




多个条件:

 
	 function show(){
		  $m=M('user');
		# $arr=$m->where("username='tyty' and sex=1")->find();
		$data['username']=array('like',array('%ty%','%2'));
		#$data['username']='tyty';
		#$data['_logic']='or';
		$arr=$m->where($data)->select();
	     var_dump($arr);
		 $this->display();
	 }
}


SELECT * FROM `user` WHERE ( (`username` LIKE '%ty%' OR `username` LIKE '%2') ) [ RunTime:0.001031s ]

 function show(){
		  $m=M('user');
		# $arr=$m->where("username='tyty' and sex=1")->find();
		$data['username']=array('like',array('%ty%','%2'),'and');
		#$data['username']='tyty';
		#$data['_logic']='or';
		$arr=$m->where($data)->select();
	     var_dump($arr);
		 $this->display();
	 }

SELECT * FROM `user` WHERE ( (`username` LIKE '%ty%' AND `username` LIKE '%2') ) [ RunTime:0.001004s ]

区间查询：

 function show(){
		  $m=M('user');
		# $arr=$m->where("username='tyty' and sex=1")->find();
		#$data['username']=array('like',array('%ty%','%2'),'and');
		#$data['username']='tyty';
		#$data['_logic']='or';
		$data['id']=array('between',array(3,4));
		$arr=$m->where($data)->select();
	     var_dump($arr);
		 $this->display();
	 }
}


SELECT * FROM `user` WHERE ( (`id` BETWEEN 3 AND 4 ) ) [ RunTime:0.000956s ]



IN 操作:

	 function show(){
		  $m=M('user');
		# $arr=$m->where("username='tyty' and sex=1")->find();
		#$data['username']=array('like',array('%ty%','%2'),'and');
		#$data['username']='tyty';
		#$data['_logic']='or';
		$data['id']=array('in',array(1,3,4));
		$arr=$m->where($data)->select();
	     var_dump($arr);
		 $this->display()

SELECT * FROM `user` WHERE ( `id` IN (1,3,4) ) [ RunTime:0.001074s ]