mysql - 如何同时向3个表中插入和更新数据

Question

客户 电话号码 客户有电话号码

customers -> detailed
customers.customer_id int(11) primary auto_increment
customers.customer_name varchar(255)

phonenumbers -> detailed
phonenumbers.phonenumber_id int(11) primary auto_increment
phonenumbers.phonenumber_type int(11)
phonenumbers.phonenumber_name varchar(255)
phonenumbers.phonenumber varchar(15)

customers_has_phonenumbers -> detailed
customers_has_phonenumbers.customer_id int(11) -> customers_customer_id
customers_has_phonenumbers.phonenumber_id int(11) -> phonenumbers_phonenumber_id

如何插入和更新电话号码

希望大家帮忙

Answer 1

插入新电话号码

insert into phonenumbers (phonenumber_type,phonenumber_name,phonenumber) values (1,'example name','example number');

insert into customers_has_phonenumbers (customers_customer_id,phonenumbers_phonenumber_id) values ((select customer_id from customers where customer_name = 'example customer name'),(select phonenumber_id from phonenumbers where phonenumber = 'example number');

更新电话号码

insert into phonenumbers (phonenumber_type,phonenumber_name,phonenumber) values (1,'example name','new phone number');

update customers_has_phonenumbers set phonenumbers_phonenumber_id = (select phonenumber_id from phonenumbers where phonenumber = 'new phone number') where phonenumbers_phonenumber_id = (select phonenumber_id from phonenumbers where phonenumber = 'old phone number') and customers_customer_id = (select customer_id from customers where customer_name = 'example customer name');

不确定您将如何处理具有相同客户名称的客户!

如果合理的话，在phonenumbers.phonenumber 列上也有一个唯一的键可能是值得的。否则，应在更新子选择中使用唯一标识电话号码行的任何内容(除了phonenumbers.phonenumber_id)以检索phonenumbers.phonenumber_id值。同一更新语句中的客户子选择也是如此。

此外，我不确定您在插入新电话号码时是否已经有客户行？如果没有，那么您必须在插入customers_has_phonenumbers 表之前插入新的客户行。

希望这有帮助。