How do I reset the increment through condition?

Question

0.00/5 (No votes)

See more:

DECLARE @intFlag INT
SET @intFlag = 1
UPDATE #temp_patrons
		set
			 @intFlag = [order] = @intFlag + 1
			 IF @intFlag = 3
			 BEGIN
			   SET @intFlag = 1
             END

What I have tried:

i tried using loop or cases but nothing happened.
The output will be like this.

EX.
| order |
|   1   |
|   2   | 
|   3   |
|   1   |
|   2   |
|   3   |

Posted 17-Feb-19 16:46pm

CaptainChizni

Updated 17-Feb-19 20:16pm

v3

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Accepted Answer · 2019-02-17T20:16:00

Solution 2

No loops, no IF required:

SQL

UPDATE x SET x.[Order] = x.NewOrder
FROM (SELECT [Order], ((ROW_NUMBER() OVER(ORDER BY myOrderingColumnName) - 1) % 3) + 1 AS NewOrder 
      FROM MyTable) x;

Posted 17-Feb-19 20:16pm

OriginalGriff

Bryian Tan · Accepted Answer · 2019-02-17T17:00:00

Solution 1

Can you do something like below?

1. Increment the flag
2. If flag = 3, reset to 1
3. Update operation

SQL

SET @intFlag = @intFlag + 1

	IF (@intFlag = 3)
		SET @intFlag = 1
	
	UPDATE #temp_patrons
		SET [order] = @intFlag

Posted 17-Feb-19 17:00pm

Bryian Tan

Comments

CaptainChizni 17-Feb-19 23:15pm

The rows are all 1. What i am going to do is increment the numbers by 1 then if it reaches 3 the increment will reset
EX.
| order |
| 1 |
| 2 |
| 3 |
| 1 |
| 2 |
| 3 |

Bryian Tan 17-Feb-19 23:40pm

Not clear what your query suppose to do, but I'm assuming there is a loop? I'll use Insert as an example because I'm sure there are more into it with the update statement.

DECLARE @test TABLE ([order] INT)

DECLARE @intFlag INT, @loopCount INT
SELECT @intFlag = 0, @loopCount = 0

WHILE (@loopCount < 6)
BEGIN
	SET @intFlag = @intFlag + 1

		IF (@intFlag > 3)
			SET @intFlag = 1
	
		INSERT INTO @test
			SELECT @intFlag

		SET @loopCount = @loopCount + 1
END


SELECT * FROM @test

Output:
order
1
2
3
1
2
3