Not a long time ago I got this new project to develop and it had really complicated DB structure I came up with. When I tried to implement it in Rails I bumped into a lot of different problems due to poor DB structure. So I thought it might worth to give a try to build a DB model in actual SQL server. But I didn't wan't to spend time and write everything manually and I opened google... Surprisingly the first result was MySQLWorkbench which I already had installed in my machine. It turns to be exactly what I was looking for:

Here it is - Models section which helped me to accomplish that.

What is it good for? Well if you need quickly develop a SQL Model and run SQL server with it.

 

Let's create a quick example. I will use 2 tables only but of course you can use as many as you need:

 

Go to official web site and follow the instruction

Quick install for ubuntu:

sudo apt install mysql-workbench

Now you should have MySQLWorkbench installed let's open it up and click on tables diagram icon on the left menu.

Click on '+' symbol. You should see following: 

Now, the UI is pretty much self observatory. Add tables, views, diagrams you need based on your database logic. Here is what I have:
2 tables Users and Pictures. Relationship one to one

3. Creating tables

4. Making connection

5. Checking Model Diagram
If everything was done correctly it should show your table connection automatically. Go head and move your tables to the diagram canvas. It should look this:

6. Exporting sql script
Let's assume that you finished you modeling and now is a time to export you DB model. You will need to Forward Engineer SQL:

Follow the instruction and save your sql script somewhere on you machine.

7. Executing sql script in mySQL server.
Next step is to run your newly created script inside mySQL. Why mySQL?  Well because it has native script syntax and require no changes made to the file. 
I assume you already have mySQL up and running. 

sudo mysql

Now we are in my sql terminal. Lets run following to execute our script:

source test_db.sql

You should see something like this:

If you made no mistakes during the model developing process it should create a new DB with the name you specified in Models tool. To check that you can always do some tests queries to see if it's there. Here is an example of DB I made the same way for one of my projects:

Next thing you can try is see if tables is actually there. I will use aermotion db:

use aermotion

8. Connecting to DB
Now is time to test it. Open up mySQLWorkbench and use localhost connection and test your DB.