JOIN Tutorial
game Table
goal Table
eteam Table
The first example shows the goal scored by a player with the last name 'Bender'. The
*
says to list all the columns in the table - a shorter way of sayingmatchid, teamid, player, gtime
Modify it to show the matchid and player name for all goals scored by Germany. To identify German players, check for:teamid = 'GER'
From the previous query you can see that Lars Bender's scored a goal in game 1012. Now we want to know what teams were playing in that match. Notice that the column
matchid
in thegoal
table corresponds to theid
column in thegame
table. We can look up information about game 1012 by finding that row in the game table. Show id, stadium, team1, team2 for just game 1012
Modify it to show the player, teamid, stadium and mdate for every German goal.
Use the same
JOIN
as in the previous question. Show the team1, team2 and player for every goal scored by a player called Marioplayer LIKE 'Mario%'
5. The table eteam
gives details of every national team including the coach. You can JOIN
goal
to eteam
using the phrase goal JOIN eteam on teamid=id
Show player
, teamid
, coach
, gtime
for all goals scored in the first 10 minutes gtime<=10
To
JOIN
game
witheteam
you could use eithergame JOIN eteam ON (team1=eteam.id)
orgame JOIN eteam ON (team2=eteam.id)
Notice that becauseid
is a column name in bothgame
andeteam
you must specifyeteam.id
instead of justid
List the dates of the matches and the name of the team in which 'Fernando Santos' was the team1 coach.
List the player for every goal scored in a game where the stadium was 'National Stadium, Warsaw'
The example query shows all goals scored in the Germany-Greece quarterfinal. Instead show the name of all players who scored a goal against Germany.
Select goals scored only by non-German players in matches where GER was the id of either team1 or team2.
You can use teamid!='GER'
to prevent listing German players.
You can use DISTINCT
to stop players being listed twice.
Show teamname and the total number of goals scored.
Show the stadium and the number of goals scored in each stadium.
For every match involving 'POL', show the matchid, date and the number of goals scored.
For every match where 'GER' scored, show matchid, match date and the number of goals scored by 'GER'
List every match with the goals scored by each team as shown. This will use "CASE WHEN" which has not been explained in any previous exercises.
Notice in the query given every goal is listed. If it was a team1 goal then a 1 appears in score1, otherwise there is a 0. You could SUM this column to get a count of the goals scored by team1. Sort your result by mdate, matchid, team1 and team2.
Last updated