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Artem Smirnov
2024-02-06 19:55:41 +02:00
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doc/build/orm/inheritance.rst
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Mapping Class Inheritance Hierarchies
=====================================
SQLAlchemy supports three forms of inheritance: **single table inheritance**,
where several types of classes are represented by a single table, **concrete
table inheritance**, where each type of class is represented by independent
tables, and **joined table inheritance**, where the class hierarchy is broken
up among dependent tables, each class represented by its own table that only
includes those attributes local to that class.
SQLAlchemy supports three forms of inheritance:
* **single table inheritance** – several types of classes are represented by a single table;
* **concrete table inheritance** – each type of class is represented by independent tables;
* **joined table inheritance** – the class hierarchy is broken up among dependent tables. Each class represented by its own table that only includes those attributes local to that class.
The most common forms of inheritance are single and joined table, while
concrete inheritance presents more configurational challenges.