JOIN Quiz

game

id	mdate	stadium	team1	team2
1001	8 June 2012	National Stadium, Warsaw	POL	GRE
1002	8 June 2012	Stadion Miejski (Wroclaw)	RUS	CZE
1003	12 June 2012	Stadion Miejski (Wroclaw)	GRE	CZE
1004	12 June 2012	National Stadium, Warsaw	POL	RUS
...

goal

matchid	teamid	player	gtime
1001	POL	Robert Lewandowski	17
1001	GRE	Dimitris Salpingidis	51
1002	RUS	Alan Dzagoev	15
1001	RUS	Roman Pavlyuchenko	82
...

eteam

id	teamname	coach
POL	Poland	Franciszek Smuda
RUS	Russia	Dick Advocaat
CZE	Czech Republic	Michal Bilek
GRE	Greece	Fernando Santos
...

Link

1. You want to find the stadium where player 'Dimitris Salpingidis' scored. Select the JOIN condition to use:

    game JOIN goal ON (id=matchid)

2. You JOIN the tables goal and eteam in an SQL statement. Indicate the list of column names that may be used in the SELECT line:

    matchid, teamid, player, gtime, id, teamname, coach

3. Select the code which shows players, their team and the amount of goals they scored against Greece(GRE).

SELECT player, teamid, COUNT(goal.*) as goals
FROM goal
JOIN game 
ON goal.matchid = game.id 
WHERE (team1 = 'GRE' OR team2 = 'GRE')
AND goal.teamid <> 'GRE'
GROUP BY player, teamid

4. Select the result that would be obtained from this code:

   SELECT DISTINCT teamid, mdate
     FROM goal JOIN game on (matchid=id)
    WHERE mdate = '9 June 2012'

DEN	9 June 2012
GER	9 June 2012

5. Select the code which would show the player and their team for those who have scored against Poland(POL) in National Stadium, Warsaw.

   SELECT DISTINCT player, teamid 
   FROM game 
   JOIN goal ON matchid = id 
   WHERE stadium = 'National Stadium, Warsaw' 
    AND (team1 = 'POL' OR team2 = 'POL')
    AND teamid != 'POL'

6. Select the code which shows the player, their team and the time they scored, for players who have played in Stadion Miejski (Wroclaw) but not against Italy(ITA).

   SELECT DISTINCT player, teamid, gtime 
   FROM game 
   JOIN goal ON matchid = id 
   WHERE stadium = 'Stadion Miejski (Wroclaw)' 
    AND ((teamid = team2 AND team1 != 'ITA') OR (teamid = team1 AND team2 != 'ITA'))

7. Select the result that would be obtained from this code:

   SELECT teamname, COUNT(*)
     FROM eteam JOIN goal ON teamid = id
    GROUP BY teamname
   HAVING COUNT(*) < 3

Netherlands	2
Poland	2
Republic of Ireland	1
Ukraine	2