# Question of the Week – 28/12/2013 – Question 2

Question:- Suppose we have a table named tbl_charactername have only one column say “charactername”.
It contains 10 rows. First 5 rows contains “Vivek Johari” and the next 5 rows contains “Abhinav Golwalkar”
tbl_charactername
———————
Vivek Johari
Vivek Johari
Vivek Johari
Vivek Johari
Vivek Johari
Abhinav Golwalkar
Abhinav Golwalkar
Abhinav Golwalkar
Abhinav Golwalkar
Abhinav Golwalkar
Now we need a SQL Query which can return the result in the form
Desired Result:-
Vivek Johari
Abhinav Golwalkar
Vivek Johari
Abhinav Golwalkar
Vivek Johari
Abhinav Golwalkar
Vivek Johari
Abhinav Golwalkar
Vivek Johari
Abhinav Golwalkar

Query should work even if the table has 30 rows with first 15 contains “vivek johari” and next 15 contains “Abhinav Golwalkar” or 40 rows with first 20 contains “vivek johari” and next 20 contains “Abhinav Golwalkar” etc. But output should contains “Vivek Johari” and “Abhinav Golwalkar” in alternate rows.

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1. SELECT CASE WHEN (A.ROW1 % 2)=0 THEN 'Vivek Johari' WHEN (A.ROW1 % 2)=1 THEN 'Abhinav Golwalkar' end PERSONNAME FROM(
SELECT charactername,ROW_NUMBER()OVER (ORDER BY charactername)AS ROW1 FROM tbl_charactername )A

1. Thanks Aviral for giving correct answer 🙂

2. SELECT charactername
, ROW_NUMBER() OVER (PARTITION BY charactername ORDER BY charactername) ordby
FROM tbl_charactername
ORDER BY 2,1

1. Just noticed your desired results are descending, and I can just put the function in the order by to create the shortest method:
SELECT charactername
FROM tbl_charactername
ORDER BY ROW_NUMBER() OVER (PARTITION BY charactername) ASC,charactername DESC

2. Hi Sean,
Thanks for giving two method for solving this problem. In the first answer we get two columns instead of one but it is correct answer as it gives the desired solution.

3. Hi Sean,
Your Second answer is also correct and returns only one column but when we execute your query, it gives error since you do not include order by clause in the Row_Over() function. The Correct Query will be
SELECT charactername
FROM tbl_charactername
ORDER BY ROW_NUMBER() OVER (PARTITION BY charactername ORDER BY charactername) ASC,charactername DESC

Thanks for giving correct answer.. 🙂

4. I think this will work for all names instead of vivek and Abhinav….

BEGIN TRAN
DECLARE @MIN INT=1 ,@MAX INT= (SELECT COUNT(*) FROM TBL_CHARACTERNAME)
CREATE TABLE #T1 (NAME VARCHAR(100) )
WHILE (@MAX>@MIN) BEGIN
INSERT INTO #T1 SELECT CHARACTERNAME FROM
(SELECT CHARACTERNAME, ROW_NUMBER() OVER (ORDER BY CHARACTERNAME) E FROM TBL_CHARACTERNAME ) T WHERE E=@MAX
INSERT INTO #T1 SELECT CHARACTERNAME FROM
(SELECT CHARACTERNAME, ROW_NUMBER() OVER (ORDER BY CHARACTERNAME) E FROM TBL_CHARACTERNAME ) T WHERE E=@MIN
SET @MIN=@MIN+1
SET @MAX=@MAX-1
END
SELECT * FROM #T1
DROP TABLE #T1
COMMIT TRAN

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