Helps you figure out the fastest and most efficient ways of getting around the city using public transport

by Raunak Sengupta (PES1201700072) Aprameya Kulkarni (PES1201701583) Dev Bhartra (PES1201700186)

Execution Procedure:

The commands to create the database are found in the file createstatements.txt in the folder Phase 2. Data can then be inserted to the database by running the commands containing insert statements found in the insertstatements.txt file, also in the folder Phase 2. Please note that due to the large size of the data being worked with, we have used 'copy' statemnts to import the data which is stored in the csv files, which can be found in the folder - Data. Then basic queries can be executed on the data by running the queries found in the file basicquries.txt, which is located in the folder, Phase 2.

Create Statements:

Database: transport

-- DROP DATABASE transport;

CREATE DATABASE transport WITH OWNER = postgres ENCODING = 'UTF8' LC_COLLATE = 'Kannada_India.utf8' LC_CTYPE = 'Kannada_India.utf8' TABLESPACE = pg_default CONNECTION LIMIT = -1;

CREATE TABLE public.bookings ( bookingid smallint NOT NULL DEFAULT nextval('bookings_bookingid_seq'::regclass), userid integer NOT NULL, to_stn character varying(50) COLLATE pg_catalog."default", from_stn character varying(50) COLLATE pg_catalog."default", type character varying(20) COLLATE pg_catalog."default", cost smallint, CONSTRAINT bookings_pkey PRIMARY KEY (bookingid), CONSTRAINT bookings_userid_key UNIQUE (userid)

) WITH ( OIDS = FALSE ) TABLESPACE pg_default;

ALTER TABLE public.bookings OWNER to postgres;

CREATE TABLE public.bus_routes ( )

WITH ( OIDS = FALSE ) TABLESPACE pg_default;

ALTER TABLE public.bus_routes OWNER to postgres;

CREATE TABLE public.buses ( busno character varying(20) COLLATE pg_catalog."default" NOT NULL DEFAULT nextval('buses_busno_seq'::regclass), dep_stn character varying(50) COLLATE pg_catalog."default" NOT NULL, des_stn character varying(50) COLLATE pg_catalog."default" NOT NULL, total_stops smallint NOT NULL, distance numeric NOT NULL, j_time numeric NOT NULL, type character varying(20) COLLATE pg_catalog."default" NOT NULL, CONSTRAINT buses_pkey PRIMARY KEY (busno), CONSTRAINT buses_total_stops_check CHECK (total_stops > 0), CONSTRAINT buses_distance_check CHECK (distance > 0::numeric) ) WITH ( OIDS = FALSE ) TABLESPACE pg_default;

ALTER TABLE public.buses OWNER to postgres;

CREATE TABLE public.metro ( dep_stn character varying(20) COLLATE pg_catalog."default", des_stn character varying(20) COLLATE pg_catalog."default", metro_type character varying(20) COLLATE pg_catalog."default" ) WITH ( OIDS = FALSE ) TABLESPACE pg_default;

ALTER TABLE public.metro OWNER to postgres;

CREATE TABLE public.stations ( station_name character varying(50) COLLATE pg_catalog."default" NOT NULL, station_code character varying(20) COLLATE pg_catalog."default" NOT NULL, type character varying(20) COLLATE pg_catalog."default" ) WITH ( OIDS = FALSE ) TABLESPACE pg_default;

ALTER TABLE public.stations OWNER to postgres;

CREATE TABLE public.users ( userid integer NOT NULL DEFAULT nextval('users_userid_seq'::regclass), buspass character varying(20) COLLATE pg_catalog."default", fname character varying(20) COLLATE pg_catalog."default" NOT NULL, lname character varying(20) COLLATE pg_catalog."default", home_stn character varying(50) COLLATE pg_catalog."default" NOT NULL, num_bookings integer, metrocard character varying(20) COLLATE pg_catalog."default", CONSTRAINT users_pkey PRIMARY KEY (userid) ) WITH ( OIDS = FALSE ) TABLESPACE pg_default;

ALTER TABLE public.users OWNER to postgres;

//Read me: //These are the insert statements for the database Transport. They copy the data from the CSV files stored in the data folder of the //GitHub repo, into the respective tables. //Direct insert statements are not being used as the number of tuples is very large (2052). This way is much more efficient. Ma'am has //approved of this in class.

\COPY bookings(bookingid,userid,to_stn,from_stn,type,cost) FROM 'C:\Users\Dev Bhartra\Documents\GitHub\TravelAdvisor\data\bookings.csv' DELIMITER ',' CSV HEADER;

\COPY bus_routes(dep_stn,stop1,stop2,stop3,stop4,stop5,stop6,stop7) FROM 'C:\Users\Dev Bhartra\Documents\GitHub\TravelAdvisor\data\bus_routes.csv';

\COPY buses(busno,dep_stn,des_stn,total_stops,distance,j_time,type) FROM 'C:\Users\Dev Bhartra\Documents\GitHub\TravelAdvisor\data\bmtcdata.csv';

\COPY metro(dep_stn,des_stn,metro_type) FROM 'C:\Users\Dev Bhartra\Documents\GitHub\TravelAdvisor\data\metro.csv';

\COPY stations(station_name,station_code,type) FROM 'C:\Users\Dev Bhartra\Documents\GitHub\TravelAdvisor\data\stations.csv';

\COPY users(userid,buspass,fname,lname,home_stn,num_bookings,metrocard) FROM 'C:\Users\Dev Bhartra\Documents\GitHub\TravelAdvisor\data\users.csv';

Basic Queries:

select * from buses where dep_stn='Banashankari Bus Station';

transport=# select * from buses where type='AC' and busno like '500%';

select max(num_bookings) from users; select fname,lname from users where num_bookings=50;

select * from buses, users where fname='Samuel' and (home_stn=dep_stn or home_stn=des_stn);

select * from bookings as B, users as U where FROM='Kengeri TTMC' and U.userid=B.userid;

select sum(cost) from bookings;

select * from buses where type='NORMAL' and des_stn='Maruthinagara';

select * from buses where des_stn='Kadugodi' and type='AC';

select userid, fname from users where num_bookings>10;