按 table 中的多个列值排序

Question

我有一批 table 格式如下：

Shipment	Source	Destination
shipment 1	Spain	France
shipment 2	Landon	Germany
shipment 3	Netherlands	Sweden
shipment 4	Finland	France
shipment 6	Landon	Belgium
shipment 7	Landon	France
shipment 8	Germany	France
shipment 9	Landon	France
shipment 10	Landon	France
shipment 11	Germany	France

我如何对上面的 table 进行排序，首先显示所有德国到法国，然后是兰登到法国，然后是兰登到德国，然后是剩余的货物。

Shipment	Source	Destination
shipment 11	Germany	France
shipment 8	Germany	France
shipment 7	Landon	France
shipment 9	Landon	France
shipment 10	Landon	France
shipment 2	Landon	Germany
shipment 1	Spain	France
shipment 3	Netherlands	Sweden
shipment 4	Finland	France
shipment 6	Landon	Belgium

感谢您的帮助！

Answer 1

这是在 ORDER BY 子句中使用 CASE 语句的想法，正如评论中已经建议的那样：

SELECT 
    * 
FROM 
    Shipments
ORDER BY 
    CASE WHEN `Source` = 'Germany' AND `Destination` = 'France' THEN 1
         WHEN `Source` = 'Landon' AND `Destination` = 'France'  THEN 2
         WHEN `Source` = 'Landon' AND `Destination` = 'Germany' THEN 3
         ELSE 4
    END

这里还有一个 fiddle：https://www.db-fiddle.com/f/58b3pWrUAeobtNd7yyUwwq/0。

按 table 中的多个列值排序

Sort by multiple column values in a table

mysql

sql

select

sql-order-by