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SQL Server: Triggers, Stored Procedures, and Functions

Modifying a stored procedure


From:

SQL Server: Triggers, Stored Procedures, and Functions

with Martin Guidry

Video: Modifying a stored procedure

Now that we've created a stored procedure, it's likely I would want to change it at some point. The easiest way to modify a stored procedure is to come back to our favorite menu, the Programmability menu, open that up, locate the stored procedure we would like to change, right-click on it, and one of the options in the right-click menu will be Modify. When I click on Modify, it throws some code up on the screen. Notice that lines 8 through 12 here are extremely similar to what I wrote. The only difference is rather than have the keyword CREATE, it has changed it to the keyword ALTER, which makes a lot of sense.
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  1. 2m 15s
    1. Welcome
      51s
    2. What you should know
      51s
    3. Using the exercise files
      33s
  2. 11m 1s
    1. Comparing triggers, functions, and procedures
      3m 25s
    2. Why use a stored procedure?
      4m 59s
    3. Why use functions?
      1m 27s
    4. Why use triggers?
      1m 10s
  3. 6m 2s
    1. Configuring your environment
      4m 53s
    2. Downloading and installing a sample database
      1m 9s
  4. 26m 25s
    1. Creating a stored procedure
      2m 46s
    2. Modifying a stored procedure
      2m 34s
    3. Returning data using data sets
      3m 45s
    4. Returning data using cursors
      3m 45s
    5. Using input and output parameters
      5m 24s
    6. Using security and permissions
      5m 24s
    7. Using transactions
      2m 47s
  5. 11m 56s
    1. Creating a user-defined function
      4m 59s
    2. Exploring single-value functions
      4m 18s
    3. Exploring table value functions
      2m 39s
  6. 9m 31s
    1. Using "after" triggers
      3m 47s
    2. Using "instead of" triggers
      2m 9s
    3. Using nested triggers
      1m 38s
    4. Using database-level triggers
      1m 57s
  7. 12m 43s
    1. Exploring a real-world INSERT procedure
      5m 32s
    2. Exploring a real-world UPDATE procedure
      3m 13s
    3. Implementing logging on DELETE
      3m 58s
  8. 19m 38s
    1. Understanding the Common Language Runtime (CLR) and the .NET framework
      1m 52s
    2. Using CLR with SQL Server 2012
      4m 11s
    3. Writing stored procedures with C# .NET
      5m 51s
    4. Writing functions with .NET
      5m 7s
    5. Choosing between T-SQL vs. CLR
      2m 37s
  9. 11m 34s
    1. Creating a basic web form and connecting to a database
      2m 56s
    2. Executing a stored procedure
      2m 4s
    3. Passing parameters
      3m 41s
    4. Getting return values
      2m 53s
  10. 1m 43s
    1. Next steps
      1m 43s

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SQL Server: Triggers, Stored Procedures, and Functions
1h 52m Advanced Sep 24, 2012

Viewers: in countries Watching now:

This course investigates several key database-programming concepts: triggers, stored procedures, functions, and .NET CLR (Common Language Runtime) assemblies. Author Martin Guidry shows how to combine these techniques and create a high-quality database using Microsoft SQL Server 2012. The course also covers real-world uses of the INSERT, UPDATE, and DELETE procedures, and how to build a basic web form to connect to your database.

Topics include:
  • Comparing triggers, functions, and stored procedures
  • Installing and configuring SQL Server
  • Creating a stored procedure
  • Returning data using data sets
  • Creating user-defined functions
  • Using "after," "instead," and nested triggers
  • Modifying existing stored procedures
  • Implementing logging on DELETE
  • Choosing between T-SQL and CLR
  • Executing a stored procedure
  • Passing parameters
Subjects:
Developer Databases
Software:
SQL Server
Author:
Martin Guidry

Modifying a stored procedure

Now that we've created a stored procedure, it's likely I would want to change it at some point. The easiest way to modify a stored procedure is to come back to our favorite menu, the Programmability menu, open that up, locate the stored procedure we would like to change, right-click on it, and one of the options in the right-click menu will be Modify. When I click on Modify, it throws some code up on the screen. Notice that lines 8 through 12 here are extremely similar to what I wrote. The only difference is rather than have the keyword CREATE, it has changed it to the keyword ALTER, which makes a lot of sense.

We are not trying to create a new stored procedure anymore, we are trying to modify a stored procedure, and in the SQL world, we use the word alter for when we want to change things. So I could make a small change to my stored procedure, and click on the red exclamation point again. And it will say that it completed my command successfully, which means the stored procedure has been modified. In order to see this, I will need to execute it again. So we will again do EXEC and the name of the stored procedure, and we see it is now giving the new text; the text from the modified stored procedure which reassures me we have successfully modified the stored procedure.

I could go back to the other window and change it again, Execute and come back to my window where I'm executing the stored procedure and we see change again. When you're working with stored procedures, it's likely that you will be modifying them often, and it would be preferable to not have to bounce back and forth between one window and the other. I don't want to have to go to one window to change my stored procedure, and a different window to execute the stored procedure. We can do that all from one window.

I'll take this code here and a little copy and paste to my other window. And the only thing I need to do is in between them add the keyword GO so that the machine knows these are two separate chunks of code. Everything above the GO is used to modify the stored procedure and then everything after GO is used to execute the stored procedure. When I click Execute, it will run both and so I can modify the stored procedure, and we see the modifications of that immediately.

So during development, this is typically the way that I like to work. It's the quickest and easiest way to modify stored procedure, and immediately see the results of those modifications.

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