如何在mysql中

Question

表名Concat的到列可以說，我在mysql中

Owners - id, name 
Pets - id, name, owner_id 
SELECT pets.*, owners.* FROM pets JOIN owners ON owners.id=pets.owner_id 

連接兩個表的結果回來用多個ID和名稱列。有沒有辦法讓列以區分像pets.id和owners.id這樣的表的方式返回，而不指定每個列名？

Answer 1

表：

CREATE TABLE `my_table_name` (
    `id` int(11) unsigned NOT NULL AUTO_INCREMENT, 
    `name` varchar(255) DEFAULT NULL, 
    PRIMARY KEY (`id`) 
) ENGINE=InnoDB DEFAULT CHARSET=latin1; 

查詢：

SELECT GROUP_CONCAT(CONCAT(" ", table_name,".", column_name, " as `", table_name, ".", column_name, "`")) FROM information_schema.columns WHERE table_name='my_table_name'; 

結果：

my_table_name.id as `my_table_name.id`, my_table_name.name as `my_table_name.name` 

Answer 2

只要命名列？

SELECT pets.id AS pets_id, 
    owners.id AS owners_id, 
    pets.name AS pets_name, 
    owners.name AS owners_name 
FROM pets JOIN owners 
ON owners.id=pets.owner_id