如何一次将数据插入和更新到3个表中

Question

客户 电话号码 customers_has_phonenumbers

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

希望你们能帮忙

Answer 1

请参阅this page上的多表语法。

Answer 2

插入新的电话号码

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');

不确定如何处理拥有相同客户名称的客户！

如果合理的话，在phonenumbers.phonenumber列上也可能有一个唯一的密钥。否则，在update sub-select中应该使用任何唯一标识phonenumbers行（除了phonenumbers.phonenumber_id）来检索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有客户行？如果没有，那么您必须在插入到customers_has_phonenumbers表之前插入新客户行。

希望这有帮助。