Question

Need help converting into sql language.

1. How many players from each town served on the committee in any capacity? Display the town as ‘Town’ and the number served as ‘Committee Service’.   Insert your screenshot here.

/* *******************************************************************
CREATE and OPEN the TENNIS Base
******************************************************************* */

Create database tennis;

USE tennis;

#--Create table players and fill it--------------------------

Create table players
(
playerno   int       not null    primary key,
name       varchar(15)   not null,
initials   varchar(3),
birth_date   date,
gender       char(1),
joined       int   not null,
street       varchar(15)   not null,
houseno       varchar(4),
zip       char(6),
town       varchar(10)   not null,
phoneno       char(10),
leagueno   char(4)
);

Insert into players values
(2,'Everett','R','1988-01-09','M',2000,'Stoney Road','43','3575NH','Stratford','070-237893','2411'),
(6,'Paramenter','R','1984-06-25','M',2002,'Haseltine Lane','80','1234KK','Stratford','070-476547','8467'),
(7,'Wise','GWS','1983-05-11','M',2006,'Edgecombe Way','39','9758VB','Stratford','070-347689',Null),
(8,'Newcastle','B','1982-07-08','F',2005,'Station Road','4','6584RO','Inglewood','070-458458','2983'),
(27,'Collins','DD','1990-05-10','F',2008,'Long Drive','804','8457DK','Eltham','079-234857','2513'),
(28,'Collins','C','1983-06-22','F',2008,'Old Main 28','10','1294QK','Midhurst','071-659599',Null),
(39,'Bishop','D','1986-10-29','M',2005,'Eaton Square','78','9629CD','Stratford','070-393435',Null),
(44,'Baker','E','1983-09-01','M',2010,'Lewis Street','23','4444LJ','Inglewood','070-368753','1124'),
(57,'Brown','M','1981-08-17','M',2007,'Edgecombe Way','16','4377CB','Stratford','070-473458','6409'),
(83,'Hope','PK','1976-11-11','M',2009,'Magdalene Road','16A','1812UP','Stratford','070-353548','1608'),
(94,'Miller','P','1993-05-14','M',2013,'High Street','33A','5746OP','Douglas','070-867564',Null),
(100,'Parmenter','P','1983-02-28','M',2012,'Haseltine Lane','80','1234KK','Stratford','070-494593','6524'),
(104,'Moorman','D','1990-05-10','F',2014,'Stout Street','65','9437AO','Eltham','079-987571','7060'),
(112,'Bailey','IP','1983-10-01','F',2014,'Vixen Road','8','6392LK','Plymouth','010-548745','1319');

#--Create the table committee_members and fill it--------------------

Create table committee_members
(
playerno   int   not null,
begin_date   date   not null,
end_date   date,
position   varchar(20),
primary key(playerno, begin_date)
);

Insert into committee_members values
(2,'2010-01-01','2012-12-31','Chairman'),
(2,'2014-01-01',Null,'General Member'),
(6,'2010-01-01','2010-12-31','Secretary'),
(6,'2011-01-01','2012-12-31','General Member'),
(6,'2012-01-01','2013-12-31','Treasurer'),
(6,'2013-01-01',Null,'Chairman'),
(8,'2010-01-01','2010-12-31','Treasurer'),
(8,'2011-01-01','2011-12-31','Secretary'),
(8,'2013-01-01','2013-12-31','General Member'),
(8,'2014-01-01',Null,'General Member'),
(27,'2010-01-01','2010-12-31','General Member'),
(27,'2011-01-01','2011-12-31','Treasurer'),
(27,'2013-01-01','2013-12-31','Treasurer'),
(57,'2012-01-01','2012-12-31','Secretary'),
(94,'2014-01-01',Null,'Treasurer'),
(112,'2012-01-01','2012-12-31','General Member'),
(112,'2014-01-01',Null,'Secretary');

#--Create the table matches and Fill it-------------------

Create table matches
(
matchno       int   not null   Primary Key,
teamno       int   not null   references teams(teamno),
playerno   int   not null   references players(playerno),
won       int,
lost       int
);

Insert into matches values
(1,1,6,3,1),
(2,1,6,2,3),
(3,1,6,3,0),
(4,1,44,3,2),
(5,1,83,0,3),
(6,1,2,1,3),
(7,1,57,3,0),
(8,1,8,0,3),
(9,2,27,3,2),
(10,2,104,3,2),
(11,2,112,2,3),
(12,2,112,1,3),
(13,2,8,0,3);

#--Create Table Penalties and Fill it-------------------------------------

create table Penalties
(
paymentno   int   not null   Primary Key,
playerno   int   not null   references players(playerno),
payment_Date   date   not null,
amount   decimal(10,2)   not null
);

Insert into Penalties values
(1,6,'2010-12-08',100.00),
(2,44,'2011-05-05',75.00),
(3,27,'2013-09-10',100.00),
(4,104,'2014-07-08',50.00),
(5,44,'2010-12-08',25.00),
(6,8,'2010-12-08' ,25.00),
(7,44,'2012-12-30',30.00),
(8,27,'2014-08-12',75.00);

#--Create Table Teams and Fill it----------------------------------------------

Create table teams
(
teamno   int   Primary Key   Not Null,
playerno   int   Not Null   references players(playerno),
division   varchar(6)
);

Insert into teams values
(1,6,'first'),
(2,27,'second');

/* ********************************************************************************************
End of loading the database

Answer 1

SQL Query :

select town as 'Town',count(committee_members.playerno) as 'Committee Service'
from players,committee_members where
players.playerno=committee_members.playerno
group by town;

Explanation :

• Above sql query will join two tables players,committee_members and
• will group the records based on playerno and will return count of Committee Service