I\'ve a problem, that I can\'t solve for days now. I have read many docs, searched many forums, but found no solution.
I\'ve 2 objects, Student 开发者_StackOverflow社区and Homework. This is a one-to-many relationship where a student can have many Homeworks
I have such a simple model: public abstract class Entity { public virtual Guid Id { get; protected set;}
I have an object model like that: Folder - simple structure with name etc. File - complex object containing reference to Folder in which it is contained.
I understand that a lookup table is necessary when we are dealing with many-to-many relationship. But what about one-to-many relationship - do we need a lookup table or a foreign key in one of the ta
I got a lot of one-to-many relationships in my database structure. For example, you have a user, the user has many degrees, he has many emails, he has many contracts, etc.
am using the Session.refreshObject(Object o) method to fresh an object that has a getList() method. This开发者_Go百科 list is provided by toplink using a one to many mapping. When I refresh the object
Let\'s say, I have three tables: table1: contains various records; table2: contains what records have what options;
I thought I\'d find an answer readily, but not so far. I have related tables -- Blog and Tags. The Tags schema looks like this:
I have a question about MySQL. I have this table structure: IDName ------------------ 1Peter 2John 3Carl 4William
加载中,请稍侯......