MySQL视图以逗号分隔结果

Question

我在MySQL Workbench中创建一个视图：

表：

我想创建一个视图，将这样的方式在那里，我得到来自addressBookData表用逗号分隔的地址簿表及数据字段值的所有行返回记录。

怎么做？

我的看法是这样的：

CREATE VIEW `addressBook_view` AS
SELECT
    `addressBook`.*,
    (SELECT `addressBookData`.`data` FROM `addressBookData` WHERE `addressBook_id` = `id` AND `type` = 'mobile') AS `mobile`,
    (SELECT `addressBookData`.`data` FROM `addressBookData` WHERE `addressBook_id` = `id` AND `type` = 'phone') AS `phone`,
    (SELECT `addressBookData`.`data` FROM `addressBookData` WHERE `addressBook_id` = `id` AND `type` = 'fax') AS `fax`
FROM
    `addressBook`

Answer 1

尝试这样的事情：

SELECT ab.*, abd.type, GROUP_CONCAT(abd.data SEPARATOR ',')
FROM addressBook ab 
LEFT JOIN addressBookData abd ON ab.id = abd.addressBook_id
GROUP BY ab.id, abd.type

您可以自己根据此查询创建视图。

Answer 2

最终这样做：

CREATE VIEW `addressBook_view` AS
SELECT
    `addressBook`.*
    (SELECT GROUP_CONCAT(`data`) FROM `addressBookData` WHERE `addressBook_id` = `addressBook`.`id` AND `type` = 'mobile' GROUP BY `id`) AS `mobile`,
    (SELECT GROUP_CONCAT(`data`) FROM `addressBookData` WHERE `addressBook_id` = `addressBook`.`id` AND `type` = 'phone' GROUP BY `id`) AS `phone`,
    (SELECT GROUP_CONCAT(`data`) FROM `addressBookData` WHERE `addressBook_id` = `addressBook`.`id` AND `type` = 'fax' GROUP BY `id`) AS `fax`
FROM
    `addressBook`