Tutorial: Design a relational database in Azure SQL Database

Applies to: Azure SQL Database

Azure SQL Database is a relational database-as-a-service (DBaaS) in the Microsoft Azure. In this tutorial, you learn how to:

Prerequisites

• Use SQL Server Management Studio (latest version) or the Azure portal Query Editor for Azure SQL Database.
  • You can also follow this same tutorial using Azure Data Studio (ADS).
• BCP and SQLCMD (latest version).
• If you don't have an Azure subscription, create a free account before you begin.
• If you don't already have an Azure SQL Database created, visit Quickstart: Create a single database. Look for the option to use your offer to try Azure SQL Database for free (preview).

Sign in to the Azure portal

Sign in to the Azure portal.

Create a server-level IP firewall rule

Azure SQL Database creates an IP firewall at the server-level. This firewall prevents external applications and tools from connecting to the server and any databases on the server unless a firewall rule allows their IP through the firewall. To enable external connectivity to your database, you must first add an IP firewall rule for your IP address (or IP address range). Follow these steps to create a server-level IP firewall rule.

1. After the deployment completes, select SQL databases from the Azure portal menu or search for and select SQL databases from any page.

2. Select yourDatabase on the SQL databases page. The overview page for your database opens, showing you the fully qualified Server name (such as contosodatabaseserver01.database.windows.net) and provides options for further configuration.

   

3. Copy this fully qualified server name for use to connect to your server and databases from SQL Server Management Studio.

4. Select Networking under Settings. Choose the Public Access tab, and then select Selected networks under Public network access to display the Firewall rules section.

   

5. Select Add your client IPv4 on the toolbar to add your current IP address to a new IP firewall rule. An IP firewall rule can open port 1433 for a single IP address or a range of IP addresses.

6. Select Save. A server-level IP firewall rule is created for your current IP address opening port 1433 on the server.

7. Select OK and then close the Firewall settings page.

Your IP address can now pass through the IP firewall. You can now connect to your database using SQL Server Management Studio or another tool of your choice. Be sure to use the server admin account you created previously.

Connect to the database

Azure SQL databases exist inside logical SQL servers. Can connect to the logical SQL server's master using a login, then connect to your database. Or, using a contained user, you can connect directly to your Azure SQL database.

Create tables in your database

Create four tables that model a student management system for universities using Transact-SQL:

• Person
• Course
• Student
• Credit

The following diagram shows how these tables are related to each other. Some of these tables reference columns in other tables. For example, the Student table references the PersonId column of the Person table. Study the diagram to understand how the tables in this tutorial are related to one another. For an in-depth look at how to create effective normalized database tables, see Designing a Normalized Database. For information about choosing data types, see Data types. By default, tables are created in the default dbo schema, meaning the two-part name of a table will be dbo.Person, for example.

1. In the query window, execute the following T-SQL query to create four tables in your database:

   -- Create Person table
   CREATE TABLE Person
   (
       PersonId INT IDENTITY PRIMARY KEY,
       FirstName NVARCHAR(128) NOT NULL,
       MiddelInitial NVARCHAR(10),
       LastName NVARCHAR(128) NOT NULL,
       DateOfBirth DATE NOT NULL
   )
   
   -- Create Student table
   CREATE TABLE Student
   (
       StudentId INT IDENTITY PRIMARY KEY,
       PersonId INT REFERENCES Person (PersonId),
       Email NVARCHAR(256)
   )
   
   -- Create Course table
   CREATE TABLE Course
   (
       CourseId INT IDENTITY PRIMARY KEY,
       Name NVARCHAR(50) NOT NULL,
       Teacher NVARCHAR(256) NOT NULL
   )
   
   -- Create Credit table
   CREATE TABLE Credit
   (
       StudentId INT REFERENCES Student (StudentId),
       CourseId INT REFERENCES Course (CourseId),
       Grade DECIMAL(5,2) CHECK (Grade <= 100.00),
       Attempt TINYINT,
       CONSTRAINT [UQ_studentgrades] UNIQUE CLUSTERED
       (
           StudentId, CourseId, Grade, Attempt
       )
   )
   

   

2. Expand the Tables node under yourDatabase in the Object Explorer to see the four new tables you created.

Load data into the tables

1. Create a folder called sampleData in your local workstation Downloads folder to store sample data for your database. For example, c:\Users\<your user name>\Downloads.

2. Right-click the following links and save them into the sampleData folder.

   • SampleCourseData
   • SamplePersonData
   • SampleStudentData
   • SampleCreditData

3. Open a new Windows command prompt window and navigate to the sampleData folder. For example, cd c:\Users\<your user name>\Downloads.

4. Execute the following bcp commands to insert sample data into the tables replacing the values for server, database, user, and password with the values for your environment.

   bcp Course in SampleCourseData -S <server>.database.windows.net -d <database> -U <user> -P <password> -q -c -t ","
   bcp Person in SamplePersonData -S <server>.database.windows.net -d <database> -U <user> -P <password> -q -c -t ","
   bcp Student in SampleStudentData -S <server>.database.windows.net -d <database> -U <user> -P <password> -q -c -t ","
   bcp Credit in SampleCreditData -S <server>.database.windows.net -d <database> -U <user> -P <password> -q -c -t ","
   

You have now loaded sample data into the tables you created earlier.

Query data

Execute the following T-SQL queries to retrieve information from the database tables.

This first query joins all four tables to find the students taught by 'Dominick Pope' who have a grade higher than 75%. In a query window, execute the following T-SQL query:

-- Find the students taught by Dominick Pope who have a grade higher than 75%
SELECT  person.FirstName, person.LastName, course.Name, credit.Grade
FROM  Person AS person
    INNER JOIN Student AS student ON person.PersonId = student.PersonId
    INNER JOIN Credit AS credit ON student.StudentId = credit.StudentId
    INNER JOIN Course AS course ON credit.CourseId = course.courseId
WHERE course.Teacher = 'Dominick Pope'
    AND Grade > 75;

This query joins all four tables and finds the courses in which 'Noe Coleman' has ever enrolled. In a query window, execute the following T-SQL query:

-- Find all the courses in which Noe Coleman has ever enrolled
SELECT  course.Name, course.Teacher, credit.Grade
FROM  Course AS course
    INNER JOIN Credit AS credit ON credit.CourseId = course.CourseId
    INNER JOIN Student AS student ON student.StudentId = credit.StudentId
    INNER JOIN Person AS person ON person.PersonId = student.PersonId
WHERE person.FirstName = 'Noe'
    AND person.LastName = 'Coleman';

Related content

• Tutorial: Design a relational database in Azure SQL Database using Azure Data Studio (ADS)
• Try Azure SQL Database for free (preview)
• What's new in Azure SQL Database?
• Configure and manage content reference - Azure SQL Database
• Plan and manage costs for Azure SQL Database

Next step

Advance to the next tutorial to learn about designing a database using Visual Studio and C#.