HackerRank SQL Solution - Basic Select - Weather Observation Station 3

• Query a list of CITY names from STATION for cities that have an even ID number. Print the results in any order, but exclude duplicates from the answer.
• The STATION table is described as follows:

HackerRank SQL Solution - Basic Select - Weather Observation Station 1

• Query a list of CITY and STATE from the STATION table.
• The STATION table is described as follows:

HackerRank SQL Solution - Basic Select - Japanese Cities' Names

• Query the names of all the Japanese cities in the CITY table. The COUNTRYCODE for Japan is JPN.
• The CITY table is described as follows:

HackerRank SQL Solution - Basic Select - Japanese Cities' Attributes

• Query all attributes of every Japanese city in the CITY table. The COUNTRYCODE for Japan is JPN.
• The CITY table is described as follows:

HackerRank SQL Solution - Basic Select - Select By ID

• Query all columns for a city in CITY with ID 1661.
• The CITY table is described as follows:

HackerRank SQL Solution - Basic Select - Select All

• Query all columns (attributes) for every row in the CITY table.
• The CITY table is described as follows:

HackerRank SQL Solution - Basic Select - Revising the Select Query II

• Query the NAME field for all American cities in the CITY table with populations larger than 120000. The CountryCode for America is the USA.
• The CITY table is described as follows:

HackerRank SQL Solution - Basic Select - Revising the Select Query I

• Query all columns for all American cities in the CITY table with populations larger than 100000.
• The CountryCode for America is USA.
• The CITY table is described as follows:

CodeChef - Python Practice Solution - Waiting Time

Problem:

• The chef is eagerly waiting for a piece of information. His secret agent told him that this information would be revealed to him after K weeks.
• X days have already passed and Chef is getting restless now. Find the number of remaining days the Chef has to wait, to get the information.
• It is guaranteed that the information has not been revealed to the Chef yet.

CodeChef - Python Practice Solution - Chairs Requirement

Problem:

• Chef's coding class is very famous in Chefland.
• This year X students joined his class and each student will require one chair to sit on. Chef already has Y chairs in his class. Determine the minimum number of new chairs the Chef must buy so that every student is able to get one chair to sit on.