À propos des opérations de base de données de thinkphp5

$result = Db::execute('insert into log(user_id, ip) values(1, 11231)');
dump($result);
$result = Db::query('select * from log');
echo &#39;<pre class="brush:php;toolbar:false">&#39;;
var_dump($result);

$str = 'insert into log(user_id, ip) values(?, ?)';
$result = Db::execute($str, [1, '12312']);

$result = Db::query('select * from log where id = ?', [4]);

//占位符
Db::execute('insert into log(user_id, ip) values(:user_id, :ip)', ['user_id'=>12, 'ip'=>'5555']);

//添加：
Db::table('log')->insert(['user_id'=>1, 'ip'=>'654321']);

//更新
Db::table('log')
    ->where('id', 12)
    ->update(['user_id'=>123]);

//查询数据
$list = Db::table('log')
    ->where('id', 12)
    ->select();

//删除数据
Db::table('log')
    ->where('id', 10)
    ->delete();

Db::name('log')->insert(['user_id'=>44, 'ip'=>5555]);