创建视图？

Question

目前我有一个将多个表连接在一起的视图，这些表按以下方式设置：

ACCOUNTS (id, first_name, last_name, etc.)

CONTACTS (id, name, etc.)

ACCOUNT_CONTACTS (id, account_id, contact_id)

EMAIL_ADDR_BEAN_REL (id, bean_id (same as account_id / contact_id), email_address_id)

EMAIL_ADDRESSES (email_address_id, email_address)

但是我有两个连接在一起的表，其中可以有多个电子邮件与一个 ID 相关联，这里是结构的示例：

Table: EMAIL_ADDR_BEAN_REL

id       email_address_id     bean_id
1          2d5b8               61720
2          14355b              61720

Table: EMAIL_ADDRESSES

id         email_address
2db58      WalterWhite@gmail.com
14355b     WW@gmail.com

在创建我的视图时，我希望能够检索与一个用户关联的这些多封电子邮件。目前这是我的视图代码，它只检索一封电子邮件：

SELECT AC.id, A.id AS account_id, A.name, A.description, A.industry, A.phone_fax, A.phone_office, A.shipping_address_street, A.shipping_address_city, A.shipping_address_state, A.shipping_address_postalcode, A.shipping_address_country, C.id AS contact_id, C.first_name, C.last_name, C.title, C.department, C.phone_home, C.phone_mobile, C.phone_work, C.primary_address_street, C.primary_address_city, C.primary_address_state, C.primary_address_postalcode, C.primary_address_country, EA.email_address, EA_C.email_address as email_contact
FROM ACCOUNTS A 
INNER JOIN ACCOUNTS_CONTACTS AS AC ON A.id = AC.account_id 
INNER JOIN CONTACTS AS C ON C.id = AC.contact_id 
LEFT JOIN EMAIL_ADDR_BEAN_REL AS ER ON ER.bean_id = A.id 
AND ER.bean_module = "Accounts"
LEFT JOIN EMAIL_ADDR_BEAN_REL AS ER_C ON ER_C.bean_id = C.id 
AND ER_C.bean_module = "Contacts"
LEFT JOIN EMAIL_ADDRESSES AS EA ON ER.email_address_id = EA.id
LEFT JOIN EMAIL_ADDRESSES AS EA_C ON ER_C.email_address_id = EA_C.id

此查询将 return 与同一用户关联的两行，除了电子邮件地址外具有完全相同的信息，我想将第二个电子邮件地址（或其他电子邮件）添加到同一行并且没有创建其他行。

不胜感激！

Answer 1

SELECT ... GROUP_CONCAT(email_address) ... 
    FROM ...
    GROUP BY A.id;

创建视图？

Creating a view?

mysql

sql

database

join

view