Newbie - Nested If statements in stored procedure syntax?

Posted on 2008-10-28
Last Modified: 2012-05-05
What would a nested if statement look like in a stored procedure:

01 If A
02     If B
03        Let x = x + 1
04     Endif B
05     Let y = y + 1
06     Else A
07      If C
08          If D
09              Let z = z + 1
09          Else D
10              Let z = z - 1
11          End D
12      Let ab =  ab + 1
13      End C
14    End A

The original VBA code nests to 9 levels.
Question by:bparkbpark
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
LVL 17

Accepted Solution

Daniel Reynolds earned 250 total points
ID: 22827068
something like the following

   IF B
        SET x = x + 1
     SET y = y + 1
       IF C
             IF D
                    SET z = z + 1
              IF NOT D
                    Set z = z - 1
               SET ab = ab + 1
LVL 39

Assisted Solution

BrandonGalderisi earned 250 total points
ID: 22827432
The important thing to note that there is no "end if" as in other languages.  And the use of "IF" means that if the condition is met, then execute the NEXT COMMAND.  If the NEXT COMMAND is a begin, then it treats that as a code block and executes until the matching END.

Let's look at these two examples.

In example 1, @b will ONLY be set to 2 if @a=1, but @c will be set to 3 regardless because the condition "if @a=1" only determines whether the "set @b=2" is executed
--example 1
If @A=1
  set @b=2
set @c=3

In this example, both set operations will be executed because they exist inside of a begin/end block.
--example 2
if @A=1
set @b=2
set @c=3

In this example, either @b will be set to 2, or @c will be set to 3.  Both lines will not be executed.
--example 3
if @a=1
  set @b=2
  set @c=3

In this example.  If @a=1, then @b will be set to 2.  If @a is not equal to 1, then @b will be set to 123, and @c to 3.
--example 4
if @a=1
  set @b=2
  set @b=123
  set @c=3

--end examples

Hope this clears up how to nest if/else statements

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I'm trying, I really am. But I've seen so many wrong approaches involving date(time) boundaries I despair about my inability to explain it. I've seen quite a few recently that define a non-leap year as 364 days, or 366 days and the list goes on. …
If you have heard of RFC822 date formats, they can be quite a challenge in SQL Server. RFC822 is an Internet standard format for email message headers, including all dates within those headers. The RFC822 protocols are available in detail at:   ht…
Michael from AdRem Software outlines event notifications and Automatic Corrective Actions in network monitoring. Automatic Corrective Actions are scripts, which can automatically run upon discovery of a certain undesirable condition in your network.…
Sometimes it takes a new vantage point, apart from our everyday security practices, to truly see our Active Directory (AD) vulnerabilities. We get used to implementing the same techniques and checking the same areas for a breach. This pattern can re…

635 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question