我正在MySQL工作台中创建一个视图:
桌子:
我想创建一个返回记录的视图,在这个视图中,我从addressBook表中获取所有行,并从addressBook data表中以逗号分隔的数据字段值。
怎么做?
我的观点是这样的:
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`
最佳答案
试试这样的:
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
您可以自己基于此查询创建视图。
关于mysql - MySQL View 以逗号分隔结果,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/37546220/