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VIEW TABLE RELATIONSHIPS IN SQL SERVER MANAGEMENT STUDIO 17 HOW TO
VIEW TABLE RELATIONSHIPS IN SQL SERVER MANAGEMENT STUDIO 17 CODE

In our example above, we would have an ArtistAlbum table containing an ArtistId and an AlbumId. Junction (or associative) tables are non-prime tables whose primary key columns are foreign keys. This is where junction tables come into play. In the many-to-many relationship, multiple artists could appear on multiple albums and multiple albums could have multiple artists (think of " Now, that's what I call music" series). Let's spice things up a bit and continue using the Chinook database with the Artist Album relationship. I'm getting bored with the Students Teachers relationship discussion.

VIEW TABLE RELATIONSHIPS IN SQL SERVER MANAGEMENT STUDIO 17 HOW TO

While the one-to-one and one-to-many relationships are fairly simple, the many-to-many relationship is where developers are unsure of how to proceed with such a change in the database. Once you have these relationships saved, you can generate your entities using the Code-First from Database option.

Click OK twice to save your relationships.

Define your relationship by filling out the foreign and primary key table and associating your fields with one another.

Click the arrow to dropdown the category "Tables and Columns Specification" and click the ellipsis on the right.

Create a new relationship by clicking the Add button.

On the left of a field, right-click to open the context menu and select "Relationships.".

In SQL Server Management Studio, right-click a table and select Design.

We'll use the Chinook database as an example. The process for creating a relationship in SQL Server Management Studio is simple. To get the most from Entity Framework, your database should have relationships so it can create and translate the tables into navigational properties. So today, I decided to follow up on this. The reason for this particular post today is because I've been asked by a number of developers how to implement many-to-many relationships in Entity Framework. While I understand you should build your systems with business objects, as to how you want the system to work instead of basing it off of a database schema, there were times when I felt the database schema was enough. With that said, you need to define your database structure properly. Using Code-First From Database confirms that I won't fat-finger a table name or field/property, causing an issue.

VIEW TABLE RELATIONSHIPS IN SQL SERVER MANAGEMENT STUDIO 17 CODE

I don't want to write all of the initial Code-First code when I have a database already defined.

I like to see how EF translates the database into Code-First results (so yes, I still love code generation with T4).

I like to get a jump on things when writing code, so I design the database first with all of the relationships to other tables and use the "Code-First from Database" option for three reasons:

With EF, we now have four options for generating your entities: If your database wasn't designed properly from the start, and you generate your entities based on the database design, your code (entities) may suffer. My thinking towards this approach was your database holds the data. Back when Entity Framework appeared, there wasn't a code-first option. When I first encountered Entity Framework (EF), I always gravitated towards a database-first option.