工具：phpstudy.

增加数据：

<?php
namespace app\index\controller;

use app\BaseController;
use think\facade\Db;
class Index extends BaseController
{

    public function hello()
    {
        $user['title']="bbbb";
        $user['text']=[
            'email'=>"2306613258@qq.com",
            'nickname'=>"新年",
        ];
        $res=Db::name('user')->json(['text'])->save($user);
        halt($res);
    }
}

查询：

<?php
namespace app\index\controller;

use app\BaseController;
use think\facade\Db;
class Index extends BaseController
{
    

    public function hello()
    {
        $user['title']="bbbb";
        $user['text']=[
            'email'=>"2306613258@qq.com",
            'nickname'=>"新年",
        ];
        $res=Db::name('user')->json(['text'])->find(22);//查找id=22的数据
        halt($res);
    }
}

更新：

<?php
namespace app\index\controller;

use app\BaseController;
use think\facade\Db;
class Index extends BaseController
{
    

    public function hello()
    {
        $user['title']="bbbb";
        $user['text']=[
            'email'=>"2306611654@qq.com",
            'nickname'=>"新年好呀，cyg",
        ];
        $res=Db::name('user')->json(['text'])->where('id',22)->update($user);//查找id=22的数据
        halt($res);
    }
}

删除：

<?php
namespace app\index\controller;

use app\BaseController;
use think\facade\Db;
class Index extends BaseController
{
    

    public function hello()
    {
        $user['title']="bbbb";
        $user['text']=[
            'email'=>"2306611654@qq.com",
            'nickname'=>"新年好呀，cyg",
        ];
        $res=Db::name('user')->json(['text'])->where('id',22)->delete();//查找id=22的数据
        halt($res);
    }
}