I have the following problem that I need to express. There are persons, workplaces and sites. Each person can be assigned to multiple workplaces. Each workplace can have multiple persons. Each workpl
I am using MySQ开发者_开发技巧L. There are 28 tables in my database. I\'ve tried to use MySQL Workbench to create E-R diagram. As there are 28 tables, everything is messed up in diagram using MySQL Wo
So I have a schema I\'ve developed that has a table that acts a junction table for multiple entities.This is for the purpose of tagging.I have my entities use GUIDs and then I\'m able to centralize th
I have three tables in my sample database: Users ID Username Password Roles ID Name Description UserRoles UserID
Let\'s say I 开发者_Go百科have a one-to-many relationship between Person and Pet entities (linked with a simple table with fields PersonID, PetID).If I do this:
I\'m using MS SQL Server 2008R2, but I believe this is database agnostic. I\'m redesigning some of my sql structure, and I\'m looking for the best way to set up 1 to many relationships.
I\'ve an iPhone applications with 2 models, Category and Content, which have a many-to-many relationship.
In Linq to SQL I could specify a relationship that didn\'t have to depen开发者_StackOverflow中文版d on the foreign keys and pks existing in the database, useful for creating composite relationships li
I am having a problem ensuring that relations between my objects remain consistent. I am using Doctrine 2, but this probably applies to other languages and ORM mappers as well.
I want to write a select between two table that have relation. I use this code but i get no result. Please advise me