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Creating a new database

From: ASP.NET Essential Training

Video: Creating a new database

After installing SQL Server and connecting to it for the first time from SQL Server Management Studio, you are ready to create your first database. The name of the file is mybookstore.sql. It's a text file that you can open in any text editor. The file uses a database named mybookstore defined at the top of the file. And then it looks for four database tables called authors, publishers, titles and users. For each of these tables, if the tables exist it first deletes them, which is an operation in SQL called dropping the table.

Creating a new database

After installing SQL Server and connecting to it for the first time from SQL Server Management Studio, you are ready to create your first database. The name of the file is mybookstore.sql. It's a text file that you can open in any text editor. The file uses a database named mybookstore defined at the top of the file. And then it looks for four database tables called authors, publishers, titles and users. For each of these tables, if the tables exist it first deletes them, which is an operation in SQL called dropping the table.

In the next section, it creates new versions of the tables. For example, this code that I'm selecting creates the table users and defines its structure. I'll turn Word Wrap on so that you can see all of the code that's involved. The users table contains a column called uteri, which is the primary key known in SQL Server as an identity column. An identity column is an integer column that auto increments, that is, each time a new record is added to the database table that database assigns the next available numeric value. There are also columns called user_name, user_password and user_roles which are variable, character, or string fields that can hold up to 50 characters each.

The next table is called titles. The titles table once again has a primary key, which is an identity column, this time named title_id. It contains two columns called pub_id and au_id for author id, which are integers. A column called title, which can contain a string of up to 80 characters. The price, which is a money value or a currency value. The pubdate, which is a date time. And a notes column, which is a variable, character, or string field containing up to 200 characters.

Once again this table has a single column primary key, the title_id. Below the code to create that table you will find a series of Insert statements. Each Insert statement creates one record in the titles table. Continuing further down the file, you will find code to create a publishers table, pub_id, which is the primary key and again is integer identity column. And pub_name, a variable character column containing up to 40 characters.

And then once again you will find a set of Insert statements that add the data. And the last table is called authors. The authors table contains a primary key named au_id using the same type and rules as all of the primary keys in the database. au_lname and au_fname, which are variable character fields. Phone, address, city, state and zip, which are all variable character or character columns. Once again there is a single column primary key based on the au_id column and below that a set of Insert statements to add the data.

So, here's how you will use the SQL file if you have access to it. I'll first reopen SQL Server Management Studio. I'm working in Windows Vista so it's a little bit easier in Vista to find the application. I simply type in part of the application name, Management Studio and when I see it appear at the top, I select it. If you are using Windows XP, you will need to go through the All Programs menu tree. This time I'll show you an alternative approach to connect into your database. Instead of using the actual machine name, this time I'm going to connect using localhost\SQLExpress and I'll use Windows Authentication rather than SQL Server Authentication. I'm still connecting to the same database server as I did in another video though. And I click the Connect button.

Once the database is open, I'll then take a look at the Databases list and show that there are no user databases currently created. Now to create my first database, I'll right click on Databases and select New Database. I'll name the database, mybookstore. When you create a new database in SQL Server you will be creating two files. The primary file, which contains the data, and the log file, which tracks changes to the data for backup and restore purposes.

In the Database file section you will see that the actual names and location of the files are listed. They are created automatically under a data folder under your SQL Server installation folder, MSSQL folder. The name of the file will match the name of the database. The primary file will have a file extension of MDF and the secondary or log file has a file extension of LDF. Click OK to create the database. Now, you will do some SQL scripting to create the structure and add the data.

Go to the Toolbar and click New Query. That opens up an SQLQuery window. Now, I'll return to the SQL file and once again open it in any text editor. I'm using TextPad. Now I'll select all of the code in the SQL file by pressing Ctr+A and then I'll copy all of that content to the Clipboard. Now I'll return to SQL Server Management Studio and I'll paste all that SQL into place. In the next step, I'll run the SQL file, which will result in creating all the tables and adding all of the data. I'll go to the Toolbar and click Execute. It takes less than a second for the operation to happen. Now to check the results, I'll go to the Database listing over in the Object Explorer and I'll open it up. And I'll open up the list of Tables and I should see the four tables listed that were defined in the SQL file, authors, publishers, titles and users.

Notice that all four tables have a dbo prefix. dbo is the schema or the database that owns those tables. It is possible in an SQL Server installation to have more than one table with the same name but they must be members of different schema. If you don't specify a schema in your SQL file, dbo is used automatically but you will see in my SQL file that the dbo prefix was in there. Now I'll check the structure of the data. I'll open up dbo.authors and then I'll open the Columns list. And I'll see all of the columns that were defined in the SQL file are listed there. And finally, I'll check the data. I'll right click on the table name and I'll choose Select Top 1000 Rows.

In the center of the SQL Server Management Studio interface, I'll see the resulting SQL statement that would retrieve the data. And then below that, I'll see the actual data that was retrieved in a data grid. You can also edit the data from this interface. For example, you can right click on the table and then select Edit Top 200 Rows and then you can actually go into the data and make changes and your changes will be saved right back to the Database files. So, that's a look at how to create the SQL Server Database if you have access to the Exercise Files. If you don't have access to the Exercise Files, you will need to create the tables yourself. For example, you can go to the Tables item in the Object Explorer, right click and select New Table. And if, for example, I were creating the authors table, I would type in the name of the column, au_id. I would select the Data Type, which in this case is int for integer. And then assuming that this was a primary key and an auto-incrementing or identity column, I would come up here and click Set Primary Key.

And then down here in the Column Properties, I would scroll down to the section labeled Identity Specification. I would open that up and then I would set the property Is Identity to Yes. And to create a variable character field, I would click once again into the list of columns, type in the name of the column. Select the Data Type, which will be varchar. Notice that it defaults to a size of 50. And then if I want to change the size of the column, I would go into the General properties in the Column Properties panel and change the Length, let's say, from 50 to 40.

After you have setup all of your table structure information in the grid above, you then save the table. I'll click on the Save icon in the Toolbar and notice that I'm prompted for the name of the table. I'm not going to save this new table because I already have my tables created. But again, if you don't have access to the Exercise Files, this is how you can create the tables using SQL Server Management Studio. You can then edit the tables and add your data directly through the SQL Server Management Studio interface.

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This video is part of

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ASP.NET Essential Training

79 video lessons · 48092 viewers

David Gassner
Author

 
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  1. 18m 44s
    1. Welcome
      1m 42s
    2. Prerequisites
      2m 21s
    3. Using the exercise files
      1m 32s
    4. Upgrading exercise file websites for ASP.NET 4.5 (NEW)
      2m 40s
    5. What's new in ASP.NET 4 (NEW)
      3m 48s
    6. What's new in ASP.NET 4.5 (NEW)
      3m 23s
    7. What's new in this course update (NEW)
      3m 18s
  2. 33m 34s
    1. Understanding how ASP.NET works
      5m 52s
    2. Installing Microsoft Visual Web Developer 2008
      3m 43s
    3. Installing Visual Studio Express 2012 for web (NEW)
      2m 12s
    4. Hello World: Creating your first ASP.NET web site
      4m 28s
    5. Creating pages with dynamic output
      7m 39s
    6. Understanding the development web server
      4m 49s
    7. Exploring the development environment
      4m 51s
  3. 40m 2s
    1. Understanding Microsoft SQL Server
      5m 47s
    2. Installing SQL Server Express
      6m 51s
    3. Exploring SQL Server Management Studio Basic
      4m 23s
    4. Creating a new database
      8m 51s
    5. Connecting to the database in ASP.NET
      5m 35s
    6. Testing SQL queries
      3m 53s
    7. Presenting a dataset in an ASP.NET page
      4m 42s
  4. 25m 31s
    1. Understanding ASP.NET web form pages
      5m 51s
    2. Separating presentation and logic with code files
      4m 17s
    3. Adding web form controls to a page
      5m 25s
    4. Handling postback data in a web form page
      5m 50s
    5. Using data binding expressions
      4m 8s
  5. 48m 37s
    1. Creating a testing environment
      4m 40s
    2. Declaring and using a simple variable
      6m 14s
    3. Declaring and using a complex object
      6m 16s
    4. Using loops
      6m 52s
    5. Using functions
      9m 25s
    6. Using trace statements
      4m 47s
    7. Debugging with breakpoints
      5m 45s
    8. Commenting code
      4m 38s
  6. 17m 43s
    1. Creating web controls
      5m 53s
    2. Registering a user control on a web form page
      3m 25s
    3. Registering controls globally in the web.config file
      3m 53s
    4. Adding public properties to a web control
      4m 32s
  7. 19m 7s
    1. Understanding Cascading Style Sheets (CSS)
      5m 36s
    2. Attaching external CSS files
      3m 12s
    3. Defining a CSS selector
      6m 10s
    4. Using CSS class selectors in server controls
      4m 9s
  8. 30m 34s
    1. Presenting data with the GridView control
      5m 49s
    2. Controlling GridView paging and appearance
      5m 46s
    3. Editing data with the GridView control
      6m 57s
    4. Presenting data with the DataList control
      5m 42s
    5. Formatting data with binding expressions
      6m 20s
  9. 36m 46s
    1. Using the DetailsView control
      7m 33s
    2. Inserting data with the DetailsView control
      6m 36s
    3. Redirecting page requests
      9m 39s
    4. Creating an update page
      6m 20s
    5. Linking to update pages from the list page
      4m 3s
    6. Deleting database records
      2m 35s
  10. 22m 15s
    1. Customizing forms with item editing templates
      6m 7s
    2. Adding validator controls to a form
      6m 40s
    3. Controlling the validation error message display
      6m 24s
    4. Using the ValidationSummary control
      3m 4s
  11. 29m 49s
    1. Creating a query with joined tables
      8m 6s
    2. Replacing control style properties with CSS
      5m 50s
    3. Creating a CSS file for printing
      3m 14s
    4. Suppressing elements in printed web pages
      5m 47s
    5. Selecting data for a report
      6m 52s
  12. 11m 14s
    1. Understanding ViewState and managing postbacks
      4m 36s
    2. Using session variables
      6m 38s
  13. 20m 57s
    1. Turning on forms authentication
      1m 51s
    2. Creating a page to log in users
      4m 18s
    3. Creating a page to set up new users
      4m 6s
    4. Understanding the security database
      3m 27s
    5. Configuring security in the web.config file
      2m 59s
    6. Creating a page to log out users
      4m 16s
  14. 27m 56s
    1. Installing IIS on Windows XP
      6m 32s
    2. Installing ASP.NET 3.5 on Windows XP
      1m 39s
    3. Deploying a site on Windows XP
      5m 9s
    4. Installing Information Internet Services (IIS) on Windows Vista, Windows 7, and Windows 8
      1m 56s
    5. Configuring ASP.NET 3.5 on Windows Vista
      2m 15s
    6. Deploying an application on Windows Vista
      3m 29s
    7. Scripting a database for deployment
      3m 36s
    8. Exporting database scripts in SQL Server Management Studio 2012 (NEW)
      3m 20s
  15. 2m 0s
    1. Where to go from here
      2m 0s

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