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Connor Leech
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add sql exercises
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‎README.md

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@@ -129,6 +129,16 @@ to potential employers. Score well on one of our public tests, and you will get
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- **JS: Interview Algorithm** - http://www.thatjsdude.com/interview/js1.html - JS: Interview Algorithms questions and solutions
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## PHP
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- **SOLID Principles in PHP** - https://laracasts.com/series/solid-principles-in-php - SOLID represents a series of guidelines that developers can use to, if done well, simplify and clarify their code.
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- **Object Oriented Bootcamp in PHP** - https://laracasts.com/series/object-oriented-bootcamp-in-php - covers fundamentals of OOP in PHP, including tricky concepts like difference between Interfaces and Abstract Classes
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## SQL
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- **Khan Academy SQL course** - https://www.khanacademy.org/computing/computer-programming/sql - Great course covering SQL principles. Highly recommend.
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## Laravel
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- **Diving Laravel** - https://divinglaravel.com/ - A deep dive into laravel core, packages, and technologies by [@themsaid](https://github.com/themsaid)
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- :octocat: **unicodeveloper/laravel-exam** - https://github.com/unicodeveloper/laravel-exam - A Laravel exam with questions from beginner to expert curated by [@unicodeveloper](https://github.com/unicodeveloper)
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## PHP
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- **SOLID Principles in PHP** - https://laracasts.com/series/solid-principles-in-php - SOLID represents a series of guidelines that developers can use to, if done well, simplify and clarify their code.
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- **Object Oriented Bootcamp in PHP** - https://laracasts.com/series/object-oriented-bootcamp-in-php - covers fundamentals of OOP in PHP, including tricky concepts like difference between Interfaces and Abstract Classes
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## Git
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- **Git flow** - https://www.atlassian.com/git/tutorials/comparing-workflows/gitflow-workflow - a git workflow that some companies follow to manage their deployments.
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- **Git Game** - https://www.git-game.com/ - The git-game is a terminal based game that teaches both new and advances users some pretty cool features of the git scm (source control management) system.
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## Webpack

‎sql/khan_academy_course.sql

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/******
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Khan Academy SQL course exercises
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https://www.khanacademy.org/computing/computer-programming/sql
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******/
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/* Books table */
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CREATE TABLE books (
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id integer PRIMARY key,
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name text,
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rating integer
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);
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insert into books values (1, 'Harry Potter', 5);
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insert into books values (2, 'Chronicles of Narnia', 4);
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insert into books values (3, 'The Martian', null);
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/* Groceries table */
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SELECT * FROM groceries WHERE aisle > 5 ORDER BY aisle;
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SELECT aisle, SUM(quantity) FROM groceries GROUP BY aisle;
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/* Online store */
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create table bikes (
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id integer primary key,
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name text,
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quantity integer,
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price numeric,
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category text
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);
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insert into bikes values (1, 'Nimbus 2000', 10, 500.00, 'Mountain');
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insert into bikes values (2, 'Firebolt', 5, 599.99, 'Racing');
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insert into bikes values (3, 'RoadRacer', 1, 445.50, 'Racing');
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insert into bikes values (4, 'MountainClimber', 6, 330.00, 'Mountain');
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insert into bikes values (5, 'Beach Cruiser', 12, 220, 'Cruiser');
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select category from bikes group by category order by quantity desc;
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select * from bikes where category = 'Mountain' order by price desc;
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select * from bikes where category = 'Racing' order by price desc;
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select * from bikes where category = 'Cruiser' order by price desc;
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select sum(quantity) from bikes;
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/* Karaoke selector */
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select title from songs;
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select title from songs where released > 1990 or mood = 'epic';
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select title from songs where released > 1990 and mood = 'epic' and duration < 240;
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/* Exercise logs */
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create table exercise_logs (
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id integer primary key autoincrement,
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type, text, minutes integer,
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calories integer,
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heart_rate integer
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);
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create table drs_favorites (
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id integer primary key,
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type text,
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reason text
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);
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insert into exercise_logs(type, minutes, calories, heart_rate) values ('biking', 30, 100, 110);
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insert into drs_favorites(type, reason) values ('biking', 'improves endurance and flexibility.');
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/* selects all activities that the user did that are recommended by doctor for cardio health */
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select * from exercise_logs where type in (select type from drs_favorites where reason like "%cardiovascular%");
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/* table of all types of activity and the total amount of calories burned by doing that activity */
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select type, sum(calories) as total_calories from exercise_logs group by type;
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select type, sum(calories) as total_calories
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from exercise_logs
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group by type
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having total_calories > 150; /* having applies to the grouped condition */
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/* 50-90% of max heart rate for activity */
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select count(*) from exercise_logs
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where heart_rate >= round(.5 * (220 -30))
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and heart_rate <= round(.9 * (220 - 30));
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/* add column for activity's target heart rate status */
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select type, heart_rate,
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case
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when heart_rate > 220 - 30 then 'above max'
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when heart_rate > round(.9 * (220 - 30)) then 'above target'
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when heart_rate > round(.5 * (220 - 30)) then 'within target'
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else 'below target'
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end as 'heart_rate_zone'
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from exercise_logs;
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/* Group the count of exercises by each heart rate zone */
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select count(*),
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case
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when heart_rate > 220 - 30 then 'above max'
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when heart_rate > round(.9 * (220 - 30)) then 'above target'
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when heart_rate > round(.5 * (220 - 30)) then 'within target'
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else 'below target'
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end as 'heart_rate_zone'
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from exercise_logs
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group by heart_rate_zone;
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/* Playlist maker */
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select title from songs where artist in (select name from artists where genre = 'Pop');
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/* Wordiest author */
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/* from books, author that has written more than a million words */
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select author, sum(words) as total_words from books group by author having total_words > 1000000;
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/* author whose average book is over 150,000 words */
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select author, avg(words) as avg_words from books group by author having avg_words > 150000;
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/* Gradebook */
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CREATE TABLE student_grades (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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name TEXT,
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number_grade INTEGER,
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fraction_completed REAL);
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INSERT INTO student_grades (name, number_grade, fraction_completed)
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VALUES ("Winston", 90, 0.805);
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INSERT INTO student_grades (name, number_grade, fraction_completed)
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VALUES ("Winnefer", 95, 0.901);
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INSERT INTO student_grades (name, number_grade, fraction_completed)
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VALUES ("Winsteen", 85, 0.906);
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INSERT INTO student_grades (name, number_grade, fraction_completed)
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VALUES ("Wincifer", 66, 0.7054);
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INSERT INTO student_grades (name, number_grade, fraction_completed)
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VALUES ("Winster", 76, 0.5013);
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INSERT INTO student_grades (name, number_grade, fraction_completed)
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VALUES ("Winstonia", 82, 0.9045);
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select name, number_grade, round(100.00 * fraction_completed) as percent_completed from student_grades;
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/* how many students have earned which letter grade */
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select count(number_grade),
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case
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when number_grade > 90 then 'A'
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when number_grade > 80 then 'B'
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when number_grade > 70 then 'C'
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else 'F'
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end as 'letter_grade'
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from student_grades
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group by letter_grade;
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/* Marvel characters database
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https://gist.github.com/pamelafox/585364b62390ea720858
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*/
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/* Marvel Heroes and Villains
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Based on the website http://marvel.wikia.com/Main_Page
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with popularity data from http://observationdeck.io9.com/something-i-found-marvel-character-popularity-poll-cb-1568108064
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and power grid data from http://marvel.wikia.com/Power_Grid#Power
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Collected by: https://www.khanacademy.org/profile/Mentrasto/
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*/
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CREATE TABLE marvels (ID INTEGER PRIMARY KEY,
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name TEXT,
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popularity INTEGER,
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alignment TEXT,
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gender TEXT,
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height_m NUMERIC,
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weight_kg NUMERIC,
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hometown TEXT,
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intelligence INTEGER,
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strength INTEGER,
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speed INTEGER,
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durability INTEGER,
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energy_Projection INTEGER,
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fighting_Skills INTEGER);
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INSERT INTO marvels VALUES(1, "Spider Man", 1, "Good", "Male", 1.78, 75.75, "USA", 4, 4, 3, 3, 1, 4);
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INSERT INTO marvels VALUES(2, "Iron Man", 20, "Neutral", "Male", 1.98, 102.58, "USA", 6, 6, 5, 6, 6, 4);
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INSERT INTO marvels VALUES(3, "Hulk", 18, "Neutral", "Male", 2.44, 635.29, "USA", 6, 7, 3, 7, 5, 4);
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INSERT INTO marvels VALUES(4, "Wolverine", 3, "Good", "Male", 1.6, 88.46, "Canada", 2, 4, 2, 4, 1, 7);
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INSERT INTO marvels VALUES(5, "Thor", 5, "Good", "Male", 1.98, 290.3, "Norway", 2, 7, 7, 6, 6, 4);
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INSERT INTO marvels VALUES(6, "Green Goblin", 91, "Bad", "Male", 1.93, 174.63, "USA", 4, 4, 3, 4, 3, 3);
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INSERT INTO marvels VALUES(7, "Magneto", 11, "Neutral", "Male", 1.88, 86.18, "Germany", 6, 3, 5, 4, 6, 4);
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INSERT INTO marvels VALUES(8, "Thanos", 47, "Bad", "Male", 2.01, 446.79, "Titan", 6, 7, 7, 6, 6, 4);
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INSERT INTO marvels VALUES(9, "Loki", 32, "Bad", "Male", 1.93, 238.14, "Jotunheim", 5, 5, 7, 6, 6, 3);
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INSERT INTO marvels VALUES(10, "Doctor Doom", 19, "Bad", "Male", 2.01, 188.24, "Latveria", 6, 4, 5, 6, 6, 4);
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INSERT INTO marvels VALUES(11, "Jean Greay", 8, "Good", "Female", 1.68, 52.16, "USA", 3, 2, 7, 7, 7, 4);
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INSERT INTO marvels VALUES(12, "Rogue", 4, "Good", "Female", 1.73, 54.43, "USA", 7, 7, 7, 7, 7, 7);
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/* most popular and least popular */
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select name, min(popularity) from marvels;
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select name, max(popularity) from marvels;
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