You define your database format with three tables, and proceed to query them, showing that you can both emulate traditional SQL SELECT, and also provide an associative lookup.
定义一个具有3个表的数据库，然后对它们进行查询，既可以模仿传统的SQLSELECT，也可以进行关联查找。
You define your database format with three tables, and proceed to query them, showing that you can both emulate traditional SQL SELECT, and also provide an associative lookup.
定义一个具有3个表的数据库，然后对它们进行查询，既可以模仿传统的SQLSELECT，也可以进行关联查找。
应用推荐