sql-server-2012-localdb

Is it possible to have a relation where the foreign key is also the primary key?

由 我的梦境 提交于 2019-12-12 21:28:09
问题 I have a table in a SQL database which should have a relation with one of two tables, but not both. My manager solved it by using the ID field of the table Competitor as both primary key and as foreign key for the two other tables. None of the tables have autoincremental IDs. Problem is, when I try to add a new compeitor, it fails unless there is an entry in both of the other tables with the specified ID, which is the opposite of what I want. Here is an illustration to show you how it's done:

How to connect to LocalDB in Visual Studio Server Explorer?

由 落花浮王杯 提交于 2019-11-26 13:52:48
I can't believe I couldn't find a working solution to this after an hour of searching. I'm following this article on Entity Framework 6.0 which gives a simple walk-through on Code First. I created the project and installed the latest EF Nuget package for the project to compile. I also verified that I have Microsoft SQL Server 2012 Express LocalDB installed which came with Visual Studio 2013. I don't have any other instances of SQL installed on my local computer. The program runs and entries are added to the database and outputted in the console. But when the article says "check your localdb"

How to connect to LocalDB in Visual Studio Server Explorer?

由 為{幸葍}努か 提交于 2019-11-26 05:54:48
问题 I can\'t believe I couldn\'t find a working solution to this after an hour of searching. I\'m following this article on Entity Framework 6.0 which gives a simple walk-through on Code First. I created the project and installed the latest EF Nuget package for the project to compile. I also verified that I have Microsoft SQL Server 2012 Express LocalDB installed which came with Visual Studio 2013. I don\'t have any other instances of SQL installed on my local computer. The program runs and
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