The document describes setting up PostgreSQL database tables to store flight, fare, and seat data. It creates tables with the appropriate columns and constraints, and populates the flight table with randomly generated number, airline, and weekday values. It then performs sample queries on the flight table.

1. •
•
•
DATABASE
SYSTEM

2. sudo apt-get update
sudo apt-get install postgresql postgresql-contrib

3. sudo -i -u postgres

4. CREATE TABLE table_name (
column_name1 col_type (field_length) column_constraints,
column_name2 col_type (field_length),
column_name3 col_type (field_length)
);

5. print "Opened database successfully";
CREATE TABLE FLIGHT (
Number INT PRIMARY KEY NOT NULL,
Airline CHAR(20) NOT NULL,
Weekdays CHAR(10) NOT NULL
);
print "Table created FLIGHT";
CREATE TABLE FARE(
Code INT PRIMARY KEY NOT NULL,
Amount INT NOT NULL,
Restrictions CHAR(20) NOT NULL,
FAnumber INT NOT NULL,
FARES_Number INT NOT NULL,
FOREIGN KEY(FAnumber) REFERENCES FLIGHT(Number)
);
print "Table created FARE";
CREATE TABLE SEAT(
Seat_No INT PRIMARY KEY NOT NULL,
Sdate CHAR(20) NOT NULL,
RES_Date CHAR(20) NOT NULL,
RES_Customer_Name CHAR(20) NOT NULL,
RES_Cphone CHAR(10) NOT NULL
);
print "Table created SEAT";
conn.commit()
conn.close()

6. #FLIGHT
Number = []
Airline = []
Weekdays = []
def Generate_FLIGHT():
#Generate FLIGHT
Airline_Name = ['AirAsia','Nok_Air','ThaiSmile','ThaiAirways','BangkokAirways']
Weekdays_Name =
['Monday','Tuesday','Wednesday','Thursday','Friday','Saturday','Sunday']
i = 90000000;
t = time.clock()
t1 = time.clock()
d = 0;
while i< 100000000:
Number.append(i);
Airline.append(Airline_Name[(i-1)%5]);
if( i % 60 == 0):
d = d + 1
if( d == 7 ):
d = 0
Weekdays.append(Weekdays_Name[d]);
if( i % 1000000 == 0):
print (i)
# print Number[i],Airline[i],Weekdays[i]
i = i + 1
print( "Generate FLIGHT success")
t1 = time.clock()
print (t ,"seconds")
print (t1,"seconds")

7. select * from flight where airline = nok_air

8. select * from flight where weekdays = 'sunday'