组通过查询最新的记录

Question

我需要组通过查询只有一张桌子，并使用group by查询只显示最新记录 我想组通过手机号码

我的列名如下：

Reservation_id ，Client_name，Email_address，Mobile_number，Vehical_type

，所以我想通过组此列，并显示最新记录

我尝试此查询：

SELECT `Reservation_id`,`Client_name`,`Email_address`,`Mobile_number` 
FROM `car_reservation` GROUP BY `Mobile_number` ASC  
ORDER BY `Reservation_id` ASC; 

Answer 1

这是最终QUERY SELECT Reservation_id,Client_name,Email_address,Mobile_number,Pickup_date_time,Pickup_address,Drop_off_address,Distance,Total_price,Vehical_type FROM car_reservation WHERE Reservation_id IN ( SELECT MAX(Reservation_id) FROM car_reservation GROUP BY Mobile_number ORDER BY Reservation_id desc ) ORDER BY Reservation_id DESC

Answer 2

试试这个..

$sql = "SELECT `Reservation_id`,`Client_name`,`Email_address`,`Mobile_number` 
FROM car_reservation GROUP BY Mobile_number ASC ORDER BY Reservation_id ASC LIMIT 1"; 

Answer 3

SELECT Reservation_id,Client_name,Email_address,Mobile_number FROM car_reservation WHERE Mobile_number in (SELECT Mobile_number FROM car_reservation ORDER BY Reservation_id ASC LIMIT 0,1); 

我希望这是你期待什么。