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问题描述
我在PostgreSQL中有这个代码
I have this code in PostgreSQL
CREATE TABLE first ( id serial, primary key(id) ); CREATE TABLE second (primary key(id)) INHERITS (first);MySQL的等效代码是什么?
What is the equivalent code for MySQL?
推荐答案MySQL不支持表继承。逼近功能的唯一方法是使用外键(MySQL也不擅长):
MySQL does not support table inheritance. The only way to approximate the functionality is by using a foreign key (which MySQL isn't too good at either):
CREATE TABLE first ( id serial, PRIMARY KEY (id) ); CREATE TABLE second ( parent integer REFERENCES first, PRIMARY KEY (parent) );显然,您必须将PostgreSQL继承版本中的任何视图和查询更改为常规多关系查询。
Obviously, you'd have to change any views and queries from the PostgreSQL "inheritance version" to regular multi-relation queries.
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MySQL是否支持表继承?
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