mysql中为什么用i代表分钟数

mysql中为什么用i代表分钟数

mysqli是面向对象，当然也可以面向过程
面向对象

PHP code?
$mysqli=new mysqli("localhost","root","123456","test");
if($mysqli->connect_error){
die("连接失败".$mysqli->conect_error);
}

$sql="select * from user1";
$res=$mysqli->query($sql);

while($row=$res->fetch_row()){
foreach($row as $k=>$v){
echo "--$v";
}
echo "
";
}

$res->free();
$mysqli->close();