Join Simon Allardice for an in-depth discussion in this video Creating user-defined functions, part of SQL Server 2008 Essential Training.
Not only do you have the over 200 functions defined in SQL Server, you can also…define your own, what are referred to as user-defined functions, sometimes…abbreviated to UDFs.…So let's say I've got a piece of SQL here which is doing a sub-query and what…this is doing right now is finding the company name for the customer who has…placed the largest order.…Okay, it's a simple example but this should do the trick.…Let's imagine that I want to get this page of information 25 times a day.…
So I'd like a function that returns it. Well I can start off with this SQL that…I have, but I do need to provide a few more pieces of information for me to…describe what this function is and for a start, I am going to have to give it some kind of name.…Now functions often take parameters.…So I do have to tell SQL Server does this one have any parameters or does…it have no parameters. And then I've also got to say what is returned by the function.…
So most of what I am going to have to write is actually wrapping around the…
- Using T-SQL (Transact-SQL)
- Managing databases with SQL Server Management Studio
- Understanding database normalization
- Using SELECT statements
- Building indexes
- Monitoring database size and integrity
- Backing up and restoring databases
- Creating functions and stored procedures
- Managing database permissions
- Creating and formatting reports
- Adding charts to reports
- Creating and executing a simple SSIS package
Skill Level Beginner
Q: I'm having problems installing the free Express R2 version of SQL Server on Windows XP. I tried 64-bit and 32-bit versions. In the videos, the author installs from a DVD. Do I need to do the same?
Q: The link to the installer for the AdventureWorks sample database, as shown in the Chapter 2 movie "Installing sample databases," no longer works. Where can I find the installer?
A: Microsoft has reorganized its site. The sample files are still there, but they're a bit harder to find. To install them:
1) Visit http://msftdbprodsamples.codeplex.com/.
2) Click the link to "SQL Server 2008 R2 OLTP."
3) Click the AdventureWOkrs2008R2 Data File link and agree to the conditions to download the MDF file.
4) Move the MDF file to your SQL Server Directory, usually located at C:\Program Files\Microsfot SQL Server\MSSQL 10_50.MSSQLSERVER\MSSQL\DATA.
5) Open the SQL Sever Management Studio and connect to your instance using an account with administrative privileges.
6) Attach the sample database by right-clicking the Databases folder in the Object Explorer and choosing Attach from the pop-up menu.
7) Click the Add button in the next menu and navigate to the MDF file in the Locate Database Files window that appears. Select it and click OK.
8) Remove the reference to the log file in the "AdventureWorks2008R2" database details: pane by selecting the Log entry and clicking removing.*
9) Click OK to return to SQL Server Management Studio and complete the attachment process.
*MDF files are the "data" files for SQL Server databases. They often come along with LOG files (ldf files). This one didn't so we need to REMOVE the reference to the non-existent log file. Select the second row in the lower section (it should say File Type: Log and Message: Not Found) and click the REMOVE button.
For an illustrated version of these instructions (with screenshots), click here for a PDF version.
1. Getting Started
2. Installing SQL Server 2008 R2
3. Tools and System Databases
SQL Server system databases2m 22s
4. Creating Databases
5. Importing Existing Data
6. Retrieving Data with SQL
7. Inserting and Updating Data
8. SQL Functions
9. Stored Procedures and Transactions
10. Core Administration Tasks
11. Backing Up and Restoring
12. Security Features
13. Reporting Services
14. Integration Services
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