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thinkphp区间查询、统计查询与SQL直接查询实例分析

Jun 06, 2016 pm 08:16 PM
thinkphp

这篇文章主要介绍了thinkphp区间查询、统计查询与SQL直接查询,以实例形式较为详细的分析了ThinkPHP比较常用的查询技巧,非常具有实用价值,需要的朋友可以参考下

本文实例讲述了thinkphp区间查询、统计查询与SQL直接查询。分享给大家供大家参考。具体方法如下:

一、区间查询:

复制代码 代码如下:

$data['id']=array(array('gt',4),array('lt',10));//默认关系是(and)并且的关系 
//SELECT * FROM `tp_user` WHERE ( (`id` > 4) AND (`id`  
$data['id']=array(array('gt',4),array('lt',10),'or') //关系就是(or)或者的关系 
 
$data['name']=array(array('like','%2%'),array('like','%  %'),'gege','or');


数组中可以加入多个数组,如果没有or,,默认是and关系

二、统计查询:

count //获取个数 
max   //获取最大数 
min   //获取最小数 
avg   //获取平均数 
sum   //获取总和

复制代码 代码如下:

$m=M('User'); 
$arr=$m->count();//得到用户总数 
$arr=$m->where("username='gege'")->count();  //放置字符串 
 
$m=M('User'); 
$data['username']='gege';//放置数组 
$c=$m->where($data)->count();  //数组操作会比较规范

三、SQL直接查询,非常灵活可以进行更多的操作。

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

复制代码 代码如下:

$m=M(); 
$result=$m->query("select *  from tp_user where id >50"); 
var_dump($result);


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

复制代码 代码如下:

$m=M(); 
$result=$m->execute("insert into tp_user(`username`) values('ztz3')"); 
var_dump($result);

希望本文所述对大家的ThinkPHP框架程序设计有所帮助。

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