Python What is ORM?

Relational mappings

Performance is slightly less efficient than source SQL

Easier and faster operability

Django's ORM and Sqlalchamy

Difference

Sqlalchamy does not have Django function full, double underlined table cross table operation

Sqlalchamy and close to SQL statements

For example, Django is simpler, such as a double-underlined table operation

SQL cannot generate a third table,

Common:

are similar to intermediate operators (intermediaries).

Use of third-party modules, not responsible for linking the database, Dbapi--pymysql mysqldb

SQLAlchemy
-Table operations: Create tables, modify tables, delete tables
-ROW operations: Manipulating data in a table

PS: The table's fields cannot be modified by default, and if you modify a component that needs to be used to sqlalchemy, modify the field

　　

Python What is ORM?