Order column by certain criteria in mysql

问题

I need to be able to order my output data in a proper way using MySQL. I'm using ORDER BY so far and everything was working correctly until now.

Let's say I have something like this: Table VEHICLES:

ID | Name | MainGroup | SubGroup 
1  |  A   |   Vehicle |   Truck
2  |  B   |   Vehicle |   Car
3  |  C   |   Vehicle |   Car
4  |  D   |   Vehicle |   Truck
5  |  E   |   Vehicle |   Truck
6  |  F   |   Vehicle |   Motorbike

I was using this:

SELECT * FROM Vehicles WHERE MainGroup=Vehicle ORDER BY Subgroup;

When I get selections they are not sorted in a way that I want, because now I want to be able to determine the way of the selected ones. Let's say that I want an output like this Car, Truck, Motorbike or some other way around. How to achieve this? Is this doable using an order by?

回答1:

Use field():

SELECT *
FROM Vehicles
WHERE MainGroup=Vehicle
ORDER BY field(Subgroup, 'Car', 'Truck', 'Motorbike');

来源：https://stackoverflow.com/questions/23325200/order-column-by-certain-criteria-in-mysql