?
Solved

sql if

Posted on 2012-03-15
9
Medium Priority
?
310 Views
Last Modified: 2012-06-27
Hi i need one ANSWER?

HOW TO CHECK IF THERE IS SOMETHING IN VALUE USER:

      if (@USER=NULL OR  @USER='0') then
         ALTER TABLE [TABLE] NOCHECK CONSTRAINT [FK_TABLE_USER]

IF THEN DOESN'T WORK



CREATE PROCEDURE [dbo].[TABLE_INSERT]
(
	@NAME varchar(3),
	@USER varchar(3),

)
AS
BEGIN

	SET NOCOUNT ON;

	BEGIN TRY
	
	if (@USER=NULL OR  @USER='0') then
	   ALTER TABLE [TABLE] NOCHECK CONSTRAINT [FK_TABLE_USER]

		-- Insert statements for procedure here
		INSERT INTO [TABLE]
				   ([NAME]
				   ,[USER]
				    
				VALUES
				   (@NAME,
				    @USER)					)
	END TRY
					
END

Open in new window


thx
0
Comment
Question by:hrvica5
[X]
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
  • 4
  • 4
9 Comments
 
LVL 2

Expert Comment

by:costaf
ID: 37725990
i think you forgot to end if

probably you forgot to end if . you should do something like this:

...

 BEGIN
      var := var + 1;
      IF var = 100 THEN
            var := 0;
            COMMIT;
      END IF;

...
0
 
LVL 70

Expert Comment

by:Scott Pletcher
ID: 37726062
What do you mean "doesn't work"?

Did the INSERT fail when you expected it to succeed?

Did the ALTER TABLE statement fail?
0
 
LVL 60

Assisted Solution

by:HainKurt
HainKurt earned 1200 total points
ID: 37726113
use

if (@USER=NULL OR  @USER='0')
         ALTER TABLE [TABLE] NOCHECK CONSTRAINT [FK_TABLE_USER]

or

if (@USER is NULL OR  @USER='0')
         ALTER TABLE [TABLE] NOCHECK CONSTRAINT [FK_TABLE_USER]
0
Free learning courses: Active Directory Deep Dive

Get a firm grasp on your IT environment when you learn Active Directory best practices with Veeam! Watch all, or choose any amount, of this three-part webinar series to improve your skills. From the basics to virtualization and backup, we got you covered.

 
LVL 60

Accepted Solution

by:
HainKurt earned 1200 total points
ID: 37726117
here is the syntax

if (...)
begin
....
end;

no then, no end if
0
 
LVL 70

Expert Comment

by:Scott Pletcher
ID: 37726463
You can't use "= NULL", you must use IS NULL:

if (@USER IS NULL OR  @USER='0')
0
 
LVL 60

Assisted Solution

by:HainKurt
HainKurt earned 1200 total points
ID: 37726508
"You can't use "= NULL", you must use IS NULL:"

which is posted before :) actually that does not create any issue... but will not give the result author try to get...

@USER = NULL >>>> False, even if @USER is null...
0
 
LVL 70

Expert Comment

by:Scott Pletcher
ID: 37726541
Actually you said use one "or" the other.

ONLY the version with IS NULL is correct and works.
0
 
LVL 60

Expert Comment

by:HainKurt
ID: 37726558
"does not work" and "does not do the right thing" is different :)

if (@user=null)
... do something here
end;

above code is correct but the code inside never works since that condition gives false...

the original code posted by author gives syntax error :) So, I fixed syntax first, then gave the correct logical code :) combo...
0
 
LVL 70

Expert Comment

by:Scott Pletcher
ID: 37726708
>> "does not work" and "does not do the right thing" is different :) <<

Not necessarily.  Colloquially then can mean the same thing.
0

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering 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

For both online and offline retail, the cross-channel business is the most recent pattern in the B2C trade space.
Ready to get certified? Check out some courses that help you prepare for third-party exams.
Via a live example combined with referencing Books Online, show some of the information that can be extracted from the Catalog Views in SQL Server.
Viewers will learn how the fundamental information of how to create a table.

650 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