怎样才咆哮
发表于 2025-3-28 17:01:39
The Battle of Zallaqa Between , to l of relationships modelled from the real-world. In OORM, the relationship is expressed as . which provides an abstraction mechanism for the association as a conceptual construct and makes it possible to capture the semantics of the relationship more clearly such as constraints, generalization abstraction, and dynamic aspects.
chlorosis
发表于 2025-3-28 22:49:13
http://reply.papertrans.cn/27/2635/263499/263499_42.png
languor
发表于 2025-3-29 01:08:07
http://reply.papertrans.cn/27/2635/263499/263499_43.png
抱负
发表于 2025-3-29 04:06:36
http://reply.papertrans.cn/27/2635/263499/263499_44.png
Minatory
发表于 2025-3-29 11:13:23
http://reply.papertrans.cn/27/2635/263499/263499_45.png
gain631
发表于 2025-3-29 15:14:01
http://reply.papertrans.cn/27/2635/263499/263499_46.png
老巫婆
发表于 2025-3-29 18:17:11
http://reply.papertrans.cn/27/2635/263499/263499_47.png
invert
发表于 2025-3-29 23:26:37
http://reply.papertrans.cn/27/2635/263499/263499_48.png
推崇
发表于 2025-3-30 02:27:42
https://doi.org/10.1007/978-3-0348-7811-1ferent kinds of inheritance just mentioned. These rules serve two purposes: first, they are used to rewrite the user defined schema to derive an internal schema and, second, to rewrite the operators. The last step enhances efficiency because the type associated constraints can be utilized for operator optimization.
Cosmopolitan
发表于 2025-3-30 07:23:10
http://reply.papertrans.cn/27/2635/263499/263499_50.png