sqlalchemy.orm.declarative_base()函数用于创建一个基类,这个基类可以用来定义与数据库表相对应的Python类。这些Python类的属性与数据库表的列相对应,从而实现了对象与关系型数据库之间的映射。通过使用这个基类,我们可以以面向对象的方式来操作数据库,而不必直接编写SQL语句。 阐述如何使用sqlalchemy.orm.declarative_ba...
EQL also supportsmutations, which are like side effect calls to an API. Mutations can appear on EQL transaction, and they look like Clojure function calls, example: [(call-mutation{:data"value"})] More details inMutations. 1.3. Datomic Pull Syntax comparison ...
1.2. EQL for operations EQL also supports mutations, which are like side effect calls to an API. Mutations can appear on EQL transaction, and they look like Clojure function calls, example: [(call-mutation {:data "value"})] More details in Mutations....