ThinkPhp学习09

原文:ThinkPhp学习09

三、区间查询

$data[‘id‘]=array(array(‘gt‘,4),array(‘lt‘,10));//默认关系是 and 的关系

//SELECT * FROM `tp_user` WHERE ( (`id` > 4) AND (`id` < 10) )

$data[‘id‘]=array(array(‘gt‘,4),array(‘lt‘,10),‘or‘) //关系就是or的关系

1 //2.SELECT * FROM `tp_user` WHERE ( (`id` > 4) AND (`id` < 10)  )
2         $data[‘id‘]=array(array(‘gt‘,4),array(‘lt‘,10));
3         //SELECT * FROM `tp_user` WHERE ( (`id` > 4) OR (`id` < 10) )
4         //$data[‘id‘]=array(array(‘gt‘,4),array(‘lt‘,10),‘or‘);
5         $arr=$m->where($data)->select();
6         

$data[‘name‘]=array(array(‘like‘,‘%2%‘),array(‘like‘,‘%五%‘),‘gege‘,‘or‘);

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

四、统计查询

count //获取个数

    //2.SELECT COUNT(*) AS tp_count FROM `tp_user` WHERE ( `sex` = 0 )
        $data[‘sex‘]=0;

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

max   //获取最大数

//2.SELECT MAX(id) AS tp_max FROM `tp_user`
        echo $m->max(‘id‘);

min   //获取最小数

 //3.SELECT MIN(id) AS tp_min FROM `tp_user`
        echo $m->min(‘id‘);

avg   //获取平均数  、sum   //获取总和

1 //2.SELECT AVG(id) AS tp_avg FROM `tp_user`
2         echo $m->avg(‘id‘);
3        //3.SELECT SUM(id) AS tp_sum FROM `tp_user` LIMIT 1
4         echo $m->sum(‘id‘);
5         //var_dump($arr);

五、SQL直接查询

a、query 主要数处理读取数据的   成功返回数据的结果集   失败返回boolean false

1         //2.select * from tp_user where id >5
2         $result=$m->query("select *  from tp_user where id >5");
3         var_dump($result);
4         

b、execute 用于更新个写入操作   成功返回影响行数   失败返回boolean false   $m=M();   $result=$m->execute("insert into t_user(`username`) values(‘ztz3‘)");   var_dump($result);

//2.insert into tp_user(`username`) values(‘ztz3‘)
        $result=$m->execute("insert into tp_user(`username`) values(‘ztz3‘)");
        var_dump($result);