• Home
  • SQL Server
    • Articles
    • T-SQL Puzzles
    • Output Puzzles
    • Interview Questions
    • Performance Tuning
    • SQL SERVER On Linux
    • Resources
  • SSRS
    • SSRS Articles
    • Interview Questions
  • SSAS
    • SSAS Articles
    • DAX
  • SQL Puzzles
  • Interview Questions
    • SQL Interview Questions
    • Data Interview Questions
  • Python Interview Puzzles
  • New Features(SQL SERVER)
    • SQL SERVER 2017
    • SQL SERVER 2016
    • SQL SERVER On Linux
  • Social
    • Expert Exchange
      • Top Expert in SQL
      • Yearly Award
      • Certifications
      • Achievement List
      • Top Expert of the Week
    • HackerRank (SQL)
    • StackOverflow
    • About Me
      • Contact Me
      • Blog Rules

Improving my SQL BI Skills

Improving my SQL BI Skills

Monthly Archives: July 2012

T – SQL 8 [Find Output]

24 Tuesday Jul 2012

Posted by Pawan Kumar Khowal in SQL Concepts, T SQL Puzzles

≈ Leave a comment

Tags

Complex SQL Challenges, Complex TSQL Challenge, Interview Qs.SQL SERVER Questions, Interview Questions on SQL, InterviewQuestions, InterviewQuestions for SQL, Learn complex SQL, Learn SQL, Learn T-SQL, PL/SQL Challenges, Puzzles, Queries for SQL Interview, SQL, SQL 2012, SQL Challenge, SQL Challenges, SQL pl/sql puzzles, SQL Puzzles, SQL SERVER Interview questions, SQL SERVER2005/2008, SQL Sudoku, SQLSERVER, T SQL Puzzles, T-SQL Challenge, Tough SQL Challenges, Tough SQL Puzzles, TSQL, TSQL Challenge, TSQL Challenges, TSQL Interview questions, TSQL Queries


T – SQL 8

—Input

—————–

ID
1
2
3
4
5

CREATE TABLE List (  ID INT )

GO

INSERT INTO List(ID) VALUES (1),(2),(3),(4),(5)

SELECT * FROM List

—Find out the OUTPUT of the following query

SELECT L.ID List1 , L1.ID List2 FROM List L JOIN List L1 ON L.ID <> L1.ID

Output would be

List1 List2
2 1
3 1
4 1
5 1
1 2
3 2
4 2
5 2
1 3
2 3
4 3
5 3
1 4
2 4
3 4
5 4
1 5
2 5
3 5
4 5

Keep Learning.

Pawan Kumar

20.000000 77.000000

Share this

  • LinkedIn
  • Facebook
  • Twitter
  • WhatsApp
  • Email

T-SQL 7. [Sum of All Previous Values]

24 Tuesday Jul 2012

Posted by Pawan Kumar Khowal in SQL Concepts, T SQL Puzzles

≈ 5 Comments

Tags

Complex SQL Challenges, Complex TSQL Challenge, How to find sum of all previous values in SQL, Interview Qs.SQL SERVER Questions, Interview Questions on SQL, InterviewQuestions, InterviewQuestions for SQL, Learn complex SQL, Learn SQL, Learn T-SQL, PL/SQL Challenges, Puzzles, Queries for SQL Interview, SQL, SQL 2012, SQL Challenge, SQL Challenges, SQL pl/sql puzzles, SQL Puzzles, SQL SERVER Interview questions, SQL SERVER2005/2008, SQL Sudoku, SQLSERVER, Sum of previous values in SQL, Sum of previous values in SQL SERVER, T SQL Puzzles, T-SQL Challenge, Tough SQL Challenges, Tough SQL Puzzles, TSQL, TSQL Challenge, TSQL Challenges, TSQL Interview questions, TSQL Queries


T-SQL Puzzle | Sum of All Previous Values

This puzzle is simple. Here we need to find out the sum of previous values. Please go through the sample input and expected output.

Sample Input

ID
1
2
3
4
5

Expected Output

ID SumPreValues
1 1
2 3 (Eg…2+1)
3 6
4 10
5 15

Rules/Restrictions

• The solution should be should use “SELECT” statement or “CTE”.
• Add your solution(s) in the comments section or send you solution(s) to pawankkmr@gmail.com

Script

Use the below script to generate the source table and fill them up with the sample data.


CREATE TABLE List
(
ID INT
)
GO

INSERT INTO List(ID) VALUES (1),(2),(3),(4),(5)

Update May 14 | Solutions


--


---------------------------------------
--Sol 1 | Pawan Kumar Khowal
---------------------------------------


SELECT *, SUM(ID) OVER (ORDER BY %%Physloc%%) Sums 
FROM List

---------------------------------------
--Sol 2 | Pawan Kumar Khowal
---------------------------------------


;WITH CTE AS
(
	SELECT *, ROW_NUMBER() OVER (ORDER BY %%Physloc%%) rnk 
	FROM List
)
SELECT ID ,  SUM(ID) OVER (ORDER BY rnk) Sums FROM CTE

---------------------------------------
--Sol 3 | Pawan Kumar Khowal
---------------------------------------


;WITH CTE AS
(
	SELECT *, ROW_NUMBER() OVER (ORDER BY %%Physloc%%) rnk
	FROM List
)
SELECT ID , (SELECT SUM(ID) FROM CTE c2 WHERE c2.rnk <= c1.rnk) Sums
FROM CTE c1


--

Add a comment if you have any other solution in mind. We all need to learn.

Keep Learning

http://MSBISkills.com

20.000000 77.000000

Share this

  • LinkedIn
  • Facebook
  • Twitter
  • WhatsApp
  • Email

SQL Server Query – 5 | Remove Unwanted Null Values

24 Tuesday Jul 2012

Posted by Pawan Kumar Khowal in T SQL Puzzles

≈ 10 Comments

Tags

Complex SQL Challenges, Complex TSQL Challenge, Interview Qs.SQL SERVER Questions, Interview Questions on SQL, InterviewQuestions, InterviewQuestions for SQL, Learn complex SQL, Learn SQL, Learn T-SQL, PL/SQL Challenges, Puzzles, Queries for SQL Interview, SQL, SQL 2012, SQL Challenge, SQL Challenges, SQL pl/sql puzzles, SQL Puzzles, SQL SERVER Interview questions, SQL SERVER2005/2008, SQL Sudoku, SQLSERVER, T SQL Puzzles, T-SQL Challenge, Tough SQL Challenges, Tough SQL Puzzles, TSQL, TSQL Challenge, TSQL Challenges, TSQL Interview questions, TSQL Queries


T-SQL Query | [Movie Puzzle] – Write a query which will remove the unwanted null values from the table. Please check sample input and expected output for details.

Sample Input

ID Name Typed
1 P NULL
1 NULL Q

Expected Output

Id Name Typed
1 P Q

Rules/Restrictions

  • The solution should be should use “SELECT” statement or “CTE”.
  • Send your solution to pawankkmr@gmail.com
  • Do not post you solution in comments section

Script

Use the below script to generate the source table and fill them up with the sample data.


--Create a table called PQ..

CREATE TABLE PQ
(
ID INT
,Name VARCHAR(10)
,Typed VARCHAR(10)
)

--Insert data
INSERT INTO PQ(ID,Name,Typed) VALUES  (1,'P',NULL) , (1,NULL,'Q')

--Verify data
SELECT * FROM  PQ

Update May 14 | Solution


--

/************   SOLUTION 1    | Pawan Kumar Khowal     ****************/


SELECT p.Id,p.Name, (SELECT r.Typed from PQ r WHERE p.ID = r.Id AND r.Typed IS NOT NULL) Typed FROM PQ p WHERE p.Name IS NOT NULL



/************   SOLUTION 2    | Pawan Kumar Khowal     ****************/

SELECT Id, MIN(CASE WHEN name IS NOT NULL THEN name ELSE NULL END) Name
, MIN(CASE WHEN typed IS NOT NULL THEN typed END) Typed 
FROM pq 
GROUP BY Id


/************   SOLUTION 3   | Pawan Kumar Khowal     ****************/

;WITH CTE1 AS
(
	SELECT ID, Name , ROW_NUMBER() OVER (ORDER BY (SELECT 1)) rnk FROM pq WHERE Name IS NOT NULL
)
,CTE2 AS
(
	SELECT ID, Typed , ROW_NUMBER() OVER (ORDER BY (SELECT 1)) rnk FROM pq WHERE Typed IS NOT NULL
)
SELECT c1.ID, Name, Typed FROM CTE1 c1 INNER JOIN CTE2 c2 ON c1.rnk = c2.rnk


--

Add a comment if you have any other solution in mind. We all need to learn.

Keep Learning

http://MSBISkills.com

20.000000 77.000000

Share this

  • LinkedIn
  • Facebook
  • Twitter
  • WhatsApp
  • Email

SQL Server Query – 5 | Movie & Role Puzzle

23 Monday Jul 2012

Posted by Pawan Kumar Khowal in T SQL Puzzles

≈ 6 Comments

Tags

Complex SQL Challenges, Complex TSQL Challenge, Interview Qs.SQL SERVER Questions, Interview Questions on SQL, InterviewQuestions, InterviewQuestions for SQL, Learn complex SQL, Learn SQL, Learn T-SQL, PL/SQL Challenges, Puzzles, Queries for SQL Interview, SQL, SQL 2012, SQL Challenge, SQL Challenges, SQL pl/sql puzzles, SQL Puzzles, SQL SERVER Interview questions, SQL SERVER2005/2008, SQL Sudoku, SQLSERVER, T SQL Puzzles, T-SQL Challenge, Tough SQL Challenges, Tough SQL Puzzles, TSQL, TSQL Challenge, TSQL Challenges, TSQL Interview questions, TSQL Queries


T-SQL Query | [Movie Puzzle] – Write a query which will gets the movie details where Mr. Amitabh and Mr. Vinod acted together and their role is actor.

Sample Input

MName AName Roles
A Amitabh Actor
A Vinod Villain
B Amitabh Actor
B Vinod Actor
D Amitabh Actor
E Vinod Actor

Expected Output

MName AName Roles
B Vinod Actor
B Amitabh Actor

Rules/Restrictions

  • The solution should be should use “SELECT” statement or “CTE”.
  • Send your solution to pawankkmr@gmail.com
  • Do not post you solution in comments section

Script

Use the below script to generate the source table and fill them up with the sample data.

–


-Create a sample movie table
CREATE TABLE [Movie]
(

[MName] [varchar] (10) NULL,
[AName] [varchar] (10) NULL,
[Roles] [varchar] (10) NULL
)

GO

--Insert data in the table

INSERT INTO Movie(MName,AName,Roles)
SELECT 'A','Amitabh','Actor'
UNION ALL
SELECT 'A','Vinod','Villan'
UNION ALL
SELECT 'B','Amitabh','Actor'
UNION ALL
SELECT 'B','Vinod','Actor'
UNION ALL
SELECT 'D','Amitabh','Actor'
UNION ALL
SELECT 'E','Vinod','Actor'

--Check your data
SELECT MName , AName , Roles FROM Movie

SolutionS

—

/*
** Solution 1
*/
select * from Movie where MName in
(select MName from Movie where Roles = ‘Actor’ and (AName = ‘Amitabh’ or AName = ‘Vinod’)
group by MName having count(MName)>1)

/*
** Solution 2
*/
SELECT m1.* FROM Movie m1 INNER JOIN Movie m2 ON m1.MName = m2.MName
WHERE
( m1.AName =’amitabh’ AND m2.AName =’vinod’ OR m2.AName =’amitabh’ AND m1.AName =’vinod’)
AND(m1.Roles =’Actor’)
AND(m2.Roles =’Actor’)

/*
** Solution 3
*/
SELECT p.* FROM Movie p
CROSS APPLY
(
SELECT COUNT(*) w FROM Movie t
WHERE ( t.AName = ‘Amitabh’ OR t.AName = ‘Vinod’ ) AND t.roles = ‘Actor’ AND t.MName = p.MName
)r
WHERE ( p.AName = ‘Amitabh’ OR p.AName = ‘Vinod’ ) AND p.roles = ‘Actor’ AND r.w > 1

—

Add a comment if you have any other solution in mind. We all need to learn.

Keep Learning

http://MSBISkills.com

20.000000 77.000000

Share this

  • LinkedIn
  • Facebook
  • Twitter
  • WhatsApp
  • Email

SQL Server Query – 4 | BirthDay Puzzle

23 Monday Jul 2012

Posted by Pawan Kumar Khowal in T SQL Puzzles

≈ 12 Comments

Tags

Complex SQL Challenges, Complex TSQL Challenge, Interview Qs.SQL SERVER Questions, Interview Questions on SQL, InterviewQuestions, InterviewQuestions for SQL, Learn complex SQL, Learn SQL, Learn T-SQL, PL/SQL Challenges, Puzzles, Queries for SQL Interview, SQL, SQL 2012, SQL Challenge, SQL Challenges, SQL pl/sql puzzles, SQL Puzzles, SQL SERVER Interview questions, SQL SERVER2005/2008, SQL Sudoku, SQLSERVER, T SQL Puzzles, T-SQL Challenge, Tough SQL Challenges, Tough SQL Puzzles, TSQL, TSQL Challenge, TSQL Challenges, TSQL Interview questions, TSQL Queries


T-SQL Query | [The Birth Day Puzzle] – Write a query which will find the Date of Birth of employees whose birthdays lies between May 7 and May 15

Sample Input

EmpId EmpName BirthDate
1 Pawan 04-12-1983
2 Zuzu 28-11-1986
3 Parveen 07-05-1977
4 Mahesh 13-01-1983
5 Ramesh 09-05-1983

Expected Output

EmpName BirthDate
Parveen 07-05-1977
Ramesh 09-05-1983

Rules/Restrictions

  • The solution should be should use “SELECT” statement or “CTE”.
  • Send your solution to pawankkmr@gmail.com
  • Do not post you solution in comments section

Script Use the below script to generate the source table and fill them up with the sample data.


--Create table

CREATE TABLEEmpBirth
(
 EmpId INT  IDENTITY(1,1) 
,EmpName VARCHAR(50) 
,BirthDate DATETIME 
)

--Insert Data
INSERT INTO EmpBirth(EmpName,BirthDate)
SELECT 'Pawan' , '12/04/1983'
UNION ALL
SELECT 'Zuzu' , '11/28/1986'
UNION ALL
SELECT 'Parveen', '05/07/1977'
UNION ALL
SELECT 'Mahesh', '01/13/1983'
UNION ALL
SELECT'Ramesh', '05/09/1983'

--Verify data
SELECT EmpId,EmpName,BirthDate FROM EmpBirth

Update May 14 | Solution


--

/************   SOLUTION 1    | Pawan Kumar Khowal     ****************/

;WITH CTE AS 
(  
		SELECT EmpId , EmpName,BirthDate , MONTH(BirthDate) AS Mont, DAY(BirthDate) AS days
        FROM EmpBirth
)
SELECT EmpId , EmpName,BirthDate FROM CTE WHERE Mont = 5 AND days >= 7 AND days <= 15


/************   SOLUTION 2    | Pawan Kumar Khowal     ****************/

;WITH CTE  
AS ( 
	SELECT EmpId , EmpName,BirthDate,
	CASE 
      WHEN  MONTH(BirthDate) < 10 THEN  '0' + CAST(MONTH(BirthDate) AS VARCHAR(1))
			ELSE 
				CAST(MONTH(BirthDate) AS VARCHAR(2))
      END 
	+ CASE WHEN DAY(BirthDate) < 10 THEN '0' + CAST(DAY(BirthDate) AS VARCHAR(1))
            ELSE
                  CAST(DAY(BirthDate) AS VARCHAR(2))
            END FormattedDOB
FROM EmpBirth
)
SELECT EmpId , EmpName,BirthDate FROM CTE WHERE FormattedDOB BETWEEN '0507' AND '0515'



--

Add a comment if you have any other solution in mind. We all need to learn.

Keep Learning

http://MSBISkills.com

20.000000 77.000000

Share this

  • LinkedIn
  • Facebook
  • Twitter
  • WhatsApp
  • Email
← Older posts

Blog Stats

  • 1,074,528 hits

Enter your email address to follow this blog and receive notifications of new posts by email.

Join 1,131 other subscribers

Pawan Khowal

502 SQL Puzzles with answers

Achievement - 500 PuzzlesJuly 18, 2018
The big day is here. Finally presented 500+ puzzles for SQL community.

200 SQL Server Puzzle with Answers

The Big DayAugust 19, 2016
The big day is here. Completed 200 SQL Puzzles today

Archives

July 2012
M T W T F S S
 1
2345678
9101112131415
16171819202122
23242526272829
3031  
« Sep   Nov »

Top Articles

  • pawankkmr.wordpress.com/2…
  • pawankkmr.wordpress.com/2…
  • pawankkmr.wordpress.com/2…
  • pawankkmr.wordpress.com/2…
  • pawankkmr.wordpress.com/2…

Archives

  • October 2020 (29)
  • September 2018 (2)
  • August 2018 (6)
  • July 2018 (25)
  • June 2018 (22)
  • May 2018 (24)
  • April 2018 (33)
  • March 2018 (35)
  • February 2018 (53)
  • January 2018 (48)
  • December 2017 (32)
  • November 2017 (2)
  • October 2017 (20)
  • August 2017 (8)
  • June 2017 (2)
  • March 2017 (1)
  • February 2017 (18)
  • January 2017 (2)
  • December 2016 (5)
  • November 2016 (23)
  • October 2016 (2)
  • September 2016 (14)
  • August 2016 (6)
  • July 2016 (22)
  • June 2016 (27)
  • May 2016 (15)
  • April 2016 (7)
  • March 2016 (5)
  • February 2016 (7)
  • December 2015 (4)
  • October 2015 (23)
  • September 2015 (31)
  • August 2015 (14)
  • July 2015 (16)
  • June 2015 (29)
  • May 2015 (25)
  • April 2015 (44)
  • March 2015 (47)
  • November 2012 (1)
  • July 2012 (8)
  • September 2010 (26)
  • August 2010 (125)
  • July 2010 (2)

Article Categories

  • Analysis Services (6)
    • DAX (6)
  • Data (2)
    • Data warehousing (2)
  • Integration Services (2)
  • Magazines (3)
  • Python (29)
  • Reporting Services (4)
  • SQL SERVER (820)
    • Download SQL Interview Q's (212)
    • SQL Concepts (323)
    • SQL Performance Tuning (155)
    • SQL Puzzles (331)
    • SQL SERVER 2017 Linux (6)
    • SQL Server Interview Questions (308)
    • SQL SERVER Puzzles (332)
    • T SQL Puzzles (547)
    • Tricky SQL Queries (439)
  • UI (30)
    • ASP.NET (5)
    • C# (13)
    • CSS (9)
    • OOPS (3)
  • Uncategorized (5)

Recent Posts

  • Python | The Print and Divide Puzzle October 30, 2020
  • Python | Count consecutive 1’s from a list of 0’s and 1’s October 30, 2020
  • Python | How to convert a number into a list of its digits October 26, 2020
  • Python | Validate an IP Address-IPV6(Internet Protocol version 6) October 26, 2020
  • Python | Print the first non-recurring element in a list October 26, 2020
  • Python | Print the most recurring element in a list October 26, 2020
  • Python | Find the cumulative sum of elements in a list October 26, 2020
  • Python | Check a character is present in a string or not October 26, 2020
  • Python | Check whether a string is palindrome or not October 26, 2020
  • Python | Find the missing number in the array of Ints October 26, 2020
  • Python | How would you delete duplicates in a list October 26, 2020
  • Python | Check whether an array is Monotonic or not October 26, 2020
  • Python | Check whether a number is prime or not October 26, 2020
  • Python | Print list of prime numbers up to a number October 26, 2020
  • Python | Print elements from odd positions in a list October 26, 2020
  • Python | Print positions of a string present in another string October 26, 2020
  • Python | How to sort an array in ascending order October 26, 2020
  • Python | How to reverse an array October 26, 2020
  • Python | Find un-common words from two strings October 26, 2020
  • Python | How to convert a string to a list October 26, 2020
  • Python | Find unique words from a string October 26, 2020
  • Python | Calculate average word length from a string October 26, 2020
  • Python | Find common words from two strings October 26, 2020
  • Python | Find the number of times a substring present in a string October 26, 2020
  • Python | Find maximum value from a list October 26, 2020
  • Python | How to find GCF of two numbers October 26, 2020
  • Python | How to find LCM of two numbers October 26, 2020
  • Python | How to convert a list to a string October 26, 2020
  • Python | Replace NONE by its previous NON None value October 26, 2020
  • Microsoft SQL Server 2019 | Features added to SQL Server on Linux September 26, 2018

Create a website or blog at WordPress.com

  • Follow Following
    • Improving my SQL BI Skills
    • Join 231 other followers
    • Already have a WordPress.com account? Log in now.
    • Improving my SQL BI Skills
    • Customize
    • Follow Following
    • Sign up
    • Log in
    • Report this content
    • View site in Reader
    • Manage subscriptions
    • Collapse this bar