这意味着 m:n 的关系必须用第三张表来存储两表之间的关系。甚至在一个简单的 1:n 关系中,1 这一方,是不知道 n 那边到底有多少个的,除非在某个之后做一次 JOIN。 表结构所有权的冲突 到底是对象的结构决定了表结构,还是表结构决定了对象的结构?是业务开发者说了算,还是 DBA 说了算? 如果完全按照面向对象的搞法,这个表结构对于其他预期数据库
We will see better solutions for this problem in Part 8 of the article series. Figure 4 Structure of the collection tables The structure of the collection table has interesting details which influence the design decisions to be made while coding using NHibernate. The structure of collection ...
Gauss compositions of means and the solution of the Matkowski–Sutô problem Publ. Math. (Debr.) (2002) D. Głazowska et al. Arithmetic mean as a linear combination of two quasi-arithmetic means Publ. Math. (Debr.) (2002) D. Głazowska Weakly associative means M.J. Frank On the...
这个查询封装是我在CodePlex中无意中看到的,具体的项目地址:点我进入,这个项目是《NHibernate with ASP.net Problem-Design-Solution》一书中贯穿讲解NHibernate的,其中对于查询的封装做的很好,而且使用起来也很方便,原版代码是VB.NET的,我这边附上C#版本的,主要步骤如下: 1、建立实体类CriteriaParameter用来包装作为参...
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这个查询封装是我在CodePlex中无意中看到的,具体的项目地址:点我进入,这个项目是《NHibernate with ASP.net Problem-Design-Solution》一书中贯穿讲解NHibernate的,其中对于查询的封装做的很好,而且使用起来也很方便,原版代码是VB.NET的,我这边附上C#版本的,主要步骤如下: 1、建立实体类CriteriaParameter用来包装作为参...
Node.js version: v20.13.1 pnpm version: v9.6.0 Please try the drizzle-kit@seq_fix version. If that fixes your problem, I'll include it in the latest release asap I would also suggest using theverboseandstrictflags to ensure the push is doing what's expected ...
EN我需要为N层应用程序仔细选择.NET ORM .这意味着I将拥有服务器(WCF服务)，它公开数据，客户机将...
二、根据首字母或中文提示,完成下列句子1. We can get back to the n ormal life now.2. It is important to keep calm in an emergency(紧急情况).3. You'll lose your slim figure if you don't watch out.4. An added problem is the growing concern (担心) for the environment.5. The b ...
In this paper we find necessary and sufficient conditions for the existence of a group divisible design GDD(n, m) of index (λ1, λ2) in whichn=2 orm=2, thereby completing the solution of the existence problem for alln,m,λ1, andλ2. In the process, necessary and sufficient conditio...