SQL(35)
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[HackerRank] Weather Observation Station 10
Query the list of CITY names from STATION that do not end with vowels. Your result cannot contain duplicates. Input Format The STATION table is described as follows: where LAT_N is the northern latitude and LONG_W is the western longitude. SELECT DISTINCT CITY FROM STATION WHERE CITY REGEXP '[^aeiou]$';
2021.01.24 -
[HackerRank] Weather Observation Station 9
Query the list of CITY names from STATION that do not start with vowels. Your result cannot contain duplicates. Input Format The STATION table is described as follows: where LAT_N is the northern latitude and LONG_W is the western longitude. SELECT DISTINCT CITY FROM STATION WHERE CITY REGEXP '^[^aeiou]';
2021.01.22 -
[HackerRank] Weather Observation Station 8
Query the list of CITY names from STATION which have vowels (i.e., a, e, i, o, and u) as both their first and last characters. Your result cannot contain duplicates. Input Format The STATION table is described as follows: where LAT_N is the northern latitude and LONG_W is the western longitude. SELECT DISTINCT CITY FROM STATION WHERE CITY REGEXP '^[aeiou].*[aeiou]$';
2021.01.22 -
[HackerRank] Weather Observation Station 7
Query the list of CITY names ending with vowels (a, e, i, o, u) from STATION. Your result cannot contain duplicates. Input Format The STATION table is described as follows: where LAT_N is the northern latitude and LONG_W is the western longitude. SELECT DISTINCT city FROM station WHERE city REGEXP '[aeiou]$';
2021.01.22 -
[HackerRank] Japan Population
Query the sum of the populations for all Japanese cities in CITY. The COUNTRYCODE for Japan is JPN. Input Format SELECT SUM(POPULATION) FROM CITY WHERE COUNTRYCODE = 'JPN';
2021.01.21 -
[HackerRank] Employee Names
Write a query that prints a list of employee names (i.e.: the name attribute) from the Employee table in alphabetical order. Input Format The Employee table containing employee data for a company is described as follows: where employee_id is an employee's ID number, name is their name, months is the total number of months they've been working for the company, and salary is their monthly salary. ..
2021.01.21