queries.sh

#! /bin/bash

PSQL="psql --username=freecodecamp --dbname=worldcup --no-align --tuples-only -c"

# Do not change code above this line. Use the PSQL variable above to query your database.

echo -e "\nTotal number of goals in all games from winning teams:"
echo "$($PSQL "SELECT SUM(winner_goals) FROM games")" # √ Output: 68

echo -e "\nTotal number of goals in all games from both teams combined:"
echo "$($PSQL "SELECT SUM(winner_goals + opponent_goals) FROM games")" # √ Output: 90

echo -e "\nAverage number of goals in all games from the winning teams:"
echo "$($PSQL "SELECT AVG(winner_goals) FROM games")" # √ Output: 2.1250000000000000

echo -e "\nAverage number of goals in all games from the winning teams rounded to two decimal places:"
echo "$($PSQL "SELECT ROUND(AVG(winner_goals), 2) FROM games")" # √ Output: 2.13

echo -e "\nAverage number of goals in all games from both teams:"
echo "$($PSQL "SELECT AVG(winner_goals + opponent_goals) FROM games")" # √ Output: 2.8125000000000000

echo -e "\nMost goals scored in a single game by one team:"
echo "$($PSQL "SELECT MAX(winner_goals) FROM games")" # √ Output: 7

echo -e "\nNumber of games where the winning team scored more than two goals:"
echo "$($PSQL "SELECT COUNT(*) FROM games WHERE winner_goals > 2")" # √ Output: 6

echo -e "\nWinner of the 2018 tournament team name:"
echo "$($PSQL "SELECT name FROM games LEFT JOIN teams on games.winner_id = teams.team_id WHERE year=2018 AND round='Final'")" # √ Output: France

echo -e "\nList of teams who played in the 2014 'Eighth-Final' round:"
echo "$($PSQL "SELECT name FROM teams FULL JOIN games ON teams.team_id = games.winner_id OR teams.team_id = games.opponent_id WHERE year=2014 AND round='Eighth-Final' ORDER BY name ASC")" # √ 

echo -e "\nList of unique winning team names in the whole data set:"
echo "$($PSQL "SELECT DISTINCT(name) FROM games LEFT JOIN teams ON games.winner_id = teams.team_id ORDER BY name")" # √ 

echo -e "\nYear and team name of all the champions:"
echo "$($PSQL "SELECT year, name FROM games LEFT JOIN teams ON games.winner_id = teams.team_id WHERE round='Final' ORDER BY year")" # √ 
# Output: 
# 2014 | Germany
# 2018 | France

echo -e "\nList of teams that start with 'Co':"
echo "$($PSQL "SELECT name FROM teams WHERE name LIKE 'Co%'")" # √
# Output: 
# Colombia
# Costa Rica