• 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

Daily Archives: June 16, 2015

T-SQL Query | [ The Gap Puzzle – III ]

16 Tuesday Jun 2015

Posted by Pawan Kumar Khowal in T SQL Puzzles

≈ Leave a comment

Tags

Complex SQL Challenges, complex sql statement(puzzle), Complex TSQL Challenge, Divide rows into two columns, Interesting Interview Questions, Interview Qs.SQL SERVER Questions, Interview questions on Joins, Interview Questions on SQL, InterviewQuestions, InterviewQuestions for SQL, Joins, Joins Interview questions, Joins Puzzle, Khowal, last non null puzzle, Learn complex SQL, Learn SQL, Learn T-SQL, Objective Puzzle, Pawan, Pawan Khowal, Pawan Kumar, Pawan Kumar Khowal, PL/SQL Challenges, Prev Value puzzle, Previous value puzzle, puzzle sql developer, Puzzles, Queries for SQL Interview, SELECT Puzzle, SQL, SQL 2012, SQL 2014, SQL 2014 Interview Questions, SQL Challenge, SQL Challenges, SQL Interview Questions, SQL Joins, SQL pl/sql puzzles, SQL Puzzles, SQL Queries, SQL Quiz, SQL Server Database, SQL SERVER Interview questions, SQL Skills, SQL Sudoku, SQL Top clause, SQL Trikcy question, sql/database interview for puzzle sql developer, SQLSERVER, T SQL Puzzles, T-SQL Challenge, T-SQL Query | [ The Complex Week Puzzle ], The Biggest Gap Puzzle, The Gap Puzzle, The Gap Puzzle Puzzle, The Tree Puzzle, TOP Clause, Tough SQL Challenges, Tough SQL Puzzles, Tricky Questions, TSQL, TSQL Challenge, TSQL Challenges, TSQL Interview questions, TSQL Queries, Week puzzle


T-SQL Query | [ The Gap Puzzle – III ]

Puzzle Description

1. We have a table called FindGaps with a single column col1.
2. If we have gap of more than 2 then we will conside that as a GAP.
3. We have to find out the gaps between these numbers in two columns like when the Gap starts and when the gap ends.
4. Please check out the sample input and expected output for details

Sample Input

Col1
1
3
4
5
6
7
9
11
15
17

Expected Output

RangeStart RangeEnd
1 11
15 17

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 FindGaps
(
	Col1 INT
)
GO

INSERT INTO FindGaps(Col1)
VALUES (1),(3),(4),(5),(6),(7),(9),(11),(15),(17)

CREATE CLUSTERED INDEX Ix_Gaps ON FindGaps(Col1)

--

Update June 16 | Solution1 – Pawan Kumar Khowal


--

;WITH CTE
AS
(
SELECT
	 COl1
	,CASE WHEN COl1 - lag(col1) OVER (ORDER BY COl1) <= 2 THEN 0 ELSE 1 END rnk
FROM FindGaps
)
,CTE2 AS
(
	SELECT COl1,SUM(rnk) OVER (ORDER BY Col1 rows unbounded preceding) grouper
	FROM CTE
)
SELECT MIN(col1) RangeStart , MAX(col1) RangeEnd FROM CTE2
GROUP BY grouper

--

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

Http://MSBISkills.com

Pawan Kumar Khowal

Share this

  • LinkedIn
  • Facebook
  • Twitter
  • WhatsApp
  • Email

T-SQL Query | [ The Total Values Missing Puzzle ]

16 Tuesday Jun 2015

Posted by Pawan Kumar Khowal in T SQL Puzzles

≈ 1 Comment

Tags

Complex SQL Challenges, complex sql statement(puzzle), Complex TSQL Challenge, Divide rows into two columns, Interesting Interview Questions, Interview Qs.SQL SERVER Questions, Interview questions on Joins, Interview Questions on SQL, InterviewQuestions, InterviewQuestions for SQL, Joins, Joins Interview questions, Joins Puzzle, Khowal, last non null puzzle, Learn complex SQL, Learn SQL, Learn T-SQL, Objective Puzzle, Pawan, Pawan Khowal, Pawan Kumar, Pawan Kumar Khowal, PL/SQL Challenges, Prev Value puzzle, Previous value puzzle, puzzle sql developer, Puzzles, Queries for SQL Interview, SELECT Puzzle, SQL, SQL 2012, SQL 2014, SQL 2014 Interview Questions, SQL Challenge, SQL Challenges, SQL Interview Questions, SQL Joins, SQL pl/sql puzzles, SQL Puzzles, SQL Queries, SQL Quiz, SQL Server Database, SQL SERVER Interview questions, SQL Skills, SQL Sudoku, SQL Top clause, SQL Trikcy question, sql/database interview for puzzle sql developer, SQLSERVER, T SQL Puzzles, T-SQL Challenge, T-SQL Query | [ The Complex Week Puzzle ], The Biggest Gap Puzzle, The Gap Puzzle, The Gap Puzzle Puzzle, The Tree Puzzle, TOP Clause, Tough SQL Challenges, Tough SQL Puzzles, Tricky Questions, TSQL, TSQL Challenge, TSQL Challenges, TSQL Interview questions, TSQL Queries, Week puzzle


T-SQL Query | [ The Total Values Missing Puzzle ]

Puzzle Description

1. We have a table called FindGaps with a single column col1.
2. We have to find out how many total values are missing between starting values till the last value.
3. Please check out the sample input and expected output for details

Sample Input

Col1
1
3
4
5
6
7
9
11
15
17

Expected Output

TotalMissingValues
7

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 FindGaps
(
	Col1 INT
)
GO

INSERT INTO FindGaps(Col1)
VALUES (1),(3),(4),(5),(6),(7),(9),(11),(15),(17)

CREATE CLUSTERED INDEX Ix_Gaps ON FindGaps(Col1)

--

Update June 16 | Solution1 – Pawan Kumar Khowal


--

;WITH CTE
AS
(
SELECT
	 COl1
	,COl1 - row_number() OVER (ORDER BY COl1) rnk
FROM FindGaps
)
SELECT MAX(rnk) TotalMissingValues FROM CTE

--

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

Http://MSBISkills.com

Pawan Kumar Khowal

Share this

  • LinkedIn
  • Facebook
  • Twitter
  • WhatsApp
  • Email

T-SQL Query | [ The Gap Puzzle – II ]

16 Tuesday Jun 2015

Posted by Pawan Kumar Khowal in T SQL Puzzles

≈ 4 Comments

Tags

Complex SQL Challenges, complex sql statement(puzzle), Complex TSQL Challenge, Divide rows into two columns, Interesting Interview Questions, Interview Qs.SQL SERVER Questions, Interview questions on Joins, Interview Questions on SQL, InterviewQuestions, InterviewQuestions for SQL, Joins, Joins Interview questions, Joins Puzzle, Khowal, last non null puzzle, Learn complex SQL, Learn SQL, Learn T-SQL, Objective Puzzle, Pawan, Pawan Khowal, Pawan Kumar, Pawan Kumar Khowal, PL/SQL Challenges, Prev Value puzzle, Previous value puzzle, puzzle sql developer, Puzzles, Queries for SQL Interview, SELECT Puzzle, SQL, SQL 2012, SQL 2014, SQL 2014 Interview Questions, SQL Challenge, SQL Challenges, SQL Interview Questions, SQL Joins, SQL pl/sql puzzles, SQL Puzzles, SQL Queries, SQL Quiz, SQL Server Database, SQL SERVER Interview questions, SQL Skills, SQL Sudoku, SQL Top clause, SQL Trikcy question, sql/database interview for puzzle sql developer, SQLSERVER, T SQL Puzzles, T-SQL Challenge, T-SQL Query | [ The Complex Week Puzzle ], The Biggest Gap Puzzle, The Gap Puzzle, The Gap Puzzle Puzzle, The Tree Puzzle, TOP Clause, Tough SQL Challenges, Tough SQL Puzzles, Tricky Questions, TSQL, TSQL Challenge, TSQL Challenges, TSQL Interview questions, TSQL Queries, Week puzzle


T-SQL Query | [ The Gap Puzzle – II ]

Puzzle Description

1. We have a table called FindGaps with a single column col1.
2. We have to find out the gaps between these numbers in two columns like when the Gap starts and when the gap ends.
3. Please check out the sample input and expected output for details

Sample Input

Col1
1
3
4
5
6
7
9
11
15
17

Expected Output

GapStart GapEnd
2 2
8 8
10 10
12 14
16 16

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 FindGaps
(
	Col1 INT
)
GO

INSERT INTO FindGaps(Col1)
VALUES (1),(3),(4),(5),(6),(7),(9),(11),(15),(17)

CREATE CLUSTERED INDEX Ix_Gaps ON FindGaps(Col1)

--

Update June 16 | Solution1 – Pawan Kumar Khowal


--

;WITH CTE
AS
(
	SELECT
		 COl1
		,COl1 - ROW_NUMBER() OVER (ORDER BY COl1) rnk		
	FROM FindGaps
)
,CTE1 AS
(
	SELECT MIN(Col1) - 1 GStart, MAX(col1) + 1 Gend, ROW_NUMBER() OVER (ORDER BY (SELECT NULL)) rnks FROM CTE
	Group By Rnk
)
SELECT CASE WHEN a.GStart >= b.Gend THEN b.Gend ELSE a.GStart END GapStart, 
	   CASE WHEN a.GStart >= b.Gend THEN a.GStart ELSE b.Gend END GapEnd
FROM CTE1 a INNER JOIN CTE1 b ON a.rnks-1 = b.rnks

--

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

Http://MSBISkills.com

Pawan Kumar Khowal

Share this

  • LinkedIn
  • Facebook
  • Twitter
  • WhatsApp
  • Email

Blog Stats

  • 1,074,533 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

June 2015
M T W T F S S
1234567
891011121314
15161718192021
22232425262728
2930  
« May   Jul »

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