<?php
//查询多条记录,返回二维数组
$result = M("admin")->select();
$result = M("admin")->where("id>2")->select();
$result = M("admin")->where("id>2")->order("id desc")->limit("0,5")->field("id,username,psssword")->select();
$result = M("admin")->where("id>2")->group("messageId")->having("messageId > 3")->order("id desc")->limit("0,5")->field("id,username,psssword")->select();
//查询一条记录，返回一维数组
$result = M("admin")->find();
$result = M("admin")->where("id=2")->find();
//要处理的数据放在数组data中
$data = array(
"username" => 'wang',
"password" => "123456"
);
//添加记录，返回影响行数
$updateRowNum = M("admin")->add($data);
//删除记录，返回影响行数
$updateRowNum = M("admin")->where("id = 2")->delete();
//修改数据放在新数组new_data中
$new_data = array(
"username" => 'wang_new',
"password" => "123456_new"
);
//修改记录，返回影响行数
$updateRowNum = M("admin")->where("id = 2")->save($new_data);
//执行select语句(不管是多行还是一行，全部返回二维数组)
$result = M()->query("select * from admin a,user u where a.id = user.aid");
//执行insert、update、delete语句，返回受影响行数
$updateRowNum = M()->execute("insert/update/delete语句");
//计算查询行数(一般用于select语句)
$row = M("admin")->select()->count();
$row = M("admin")->where("id > 3")->select()->count();
?>
