Psingh12354 / my_dbms_note

my_dbms_note

show databases;
create database coffe_store;
use coffe_store;
create table product(
id int auto_increment primary key,
name varchar(30),
price decimal(3,2)
);
#to add a column
alter table product add column coffe_his varchar(20);
# to delete a column
alter table product drop column coffe_his;
# drop table product
insert into product values(1,'Priyanshu',2.5);
insert into product values(2,'Singh',2.50);
select * from product;
truncate table product;
select * from product;
show tables;

Add column

alter table product add column coffe_his varchar(20);

delete column

alter table product drop column coffe_his;

truncate

truncate table product;

Add primary key

Alter table <tablename> add primary key (columnname);
Alter table address add primary key (id);

Remove added primary key

Alter table <tablename> drop primary key;
Alter table address drop primary key;

to get the details

descibe tablename

Foregin key

CREATE TABLE Orders (
    OrderID int NOT NULL,
    OrderNumber int NOT NULL,
    PersonID int,
    PRIMARY KEY (OrderID),
    FOREIGN KEY (PersonID) REFERENCES Persons(PersonID)
);

ALTER TABLE Orders
ADD CONSTRAINT FK_PersonOrder
FOREIGN KEY (PersonID) REFERENCES Persons(PersonID);

change column name

alter table pets change `species` `animal_type` varchar(20);

modify datatype

alter table pets modify id numeric;

insert into table

# one at a time
insert into pets (id,name,animal_type,owner_id) values (1,'Priyanshu','Dog',2);
# can insert more than ones in one go
insert into pets (id,name,animal_type,owner_id) values (2,'Priyanshu','Dog',4),(3,'Priyanshu','Dog',6);

Update column value

update pets set owner_id=5 where id=2;

delete data from col

delete from pets where id=1;

Is null and is not null

select * from customer1 where phone_number is null;
select * from customer1 where phone_number is not null;

In and not in

select * from customer1 where gender in ('M','F');
select * from customer1 where gender not in ('M');

limit and offset

select * from customer1 limit 5; # for first 5
select * from customer1 limit 5 offset 10; #from 5 to 10

Alias to change name of column only for output

select first_name,last_name,gender,phone_number as number from customer1; #as is use to create alias alternate name

top 3

SELECT TOP 3 * FROM Customers;

cinema system

show databases;
create database cinema_booking_system;
use cinema_booking_system;
# film
create table films(
id int primary key auto_increment,
name varchar(50) not null,
lenght_min int not null
);
show tables;
select * from films;
describe films;
#customers
create table customers(
id int primary key auto_increment,
first_name varchar(45),
last_name varchar(45),
email varchar(45) not null unique
);
show tables;
#rooms
create table rooms(
id int primary key auto_increment,
name varchar(45) not null,
no_seats int not null
);
describe rooms;
#screening table
create table screenings(
id int primary key auto_increment,
film_id int not null,
room_id int not null,
start_time datetime not null,
foreign key (film_id) references films(id),
foreign key (room_id) references rooms(id)
);
describe screenings;
#seats
create table seats(
id int primary key auto_increment,
row1 char(1) not null,
number int not null,
room_id int not null,
foreign key (room_id) references rooms(id)
);
describe seats;
# booking
create table bookings(
id int primary key auto_increment,
screening_id int not null,
customer_id int not null,
foreign key (screening_id) references screenings(id),
foreign key (customer_id) references customers(id)
);
describe bookings;
# reserve seats
create table reserved_seat(
id int primary key auto_increment,
booking_id int not null,
seat_id int not null,
foreign key (booking_id) references bookings(id),
foreign key (seat_id) references seats(id)
);
describe reserved_seat;

# inserting data
INSERT INTO films (name, lenght_min)
VALUES ('Blade Runner 2049',153),
('Dunkirk',106),
('Geostorm',121),
('Thor: Ragnarok',107),
('Jigsaw',116),
('The Death of Stalin',98),
('The Lego Ninjago Movie',101),
('Murder on the Orient Express',135),
('Paddington 2',88),
('Breathe',117),
('Blade Runner',127),
('Victoria and Abdul',112);
#cust
INSERT INTO customers (first_name, last_name, email)
VALUES ('David','May','[e-mail]'),('Theresa','Davis','[e-mail]'),('Jerry','Martin','[e-mail]'),('John','Smith','[e-mail]'),
('Martin','Watkins','[e-mail]'),('Emma','Watson','[e-mail]'),('Javier','Pastore','[e-mail]'),('Charlotte','Hare','[e-mail]'),
('Mark','Smith','[e-mail]'),('Emily','Thorne','[e-mail]'),('David','Paul','[e-mail]'),('Cherry','Wang','[e-mail]'),
('Bort','Simpson','[e-mail]'),('Emma','Connor','[e-mail]'),('Jonathan','Edwards','[e-mail]'),('Simon','Davis','[e-mail]'),
('Sophie','Marshall','[e-mail]'),('Sally','Lam','[e-mail]'),('Kenneth','Harrison','[e-mail]'),(NULL,'Smith','[e-mail]'),
('Harry','Weasley','[e-mail]'),('Ron','Potter','[e-mail]'),('Ray','Wilkinson','[e-mail]'),('Samuel','Windsor','[e-mail]'),
('Jennifer','David','[e-mail]'),('Larry','Davis','[e-mail]'),('Bolt','Tin','[e-mail]'),('Sarah','Thompson','[e-mail]'),
('Alan','Bennet','[e-mail]'),('Brian','Apple','[e-mail]'),('Rob','Bryson','[e-mail]'),('Shelly','Zu','[e-mail]'),
('Steve','Shoogan','[e-mail]'),('Matthew','Gray','[e-mail]'),('Sally','Kramer','[e-mail]'),('Peter','Chef','[e-mail]'),
(NULL,'Cooke','[e-mail]'),('Marty','Seinfeld','[e-mail]'),('Carl','Green','[e-mail]'),('Emma','Greene','[e-mail]'),
('Michael','Bannon','[e-mail]'),('Paul','Showman','[e-mail]'),('Harry','Goldthistle','[e-mail]'),('Gill','Newton','[e-mail]'),
('Preston','Peters','[e-mail]'),('Simon','Smithson','[e-mail]'),('Benjamin','Rabbit','[e-mail]'),('Jerry','David','[e-mail]'),
('Olivia','Tulip','[e-mail]'),('Richard','Horne','[e-mail]'),('Betty','Corbe','[e-mail]'),('Anne','Callaway','[e-mail]'),
('Yifan','Way','[e-mail]'),('Charlie','Cheene','[e-mail]'),('Ula','Boon','[e-mail]'),('Buster','David','[e-mail]'),
('Dustin','Beer','[e-mail]'),('John','Sleet','[e-mail]'),('August','Summer','[e-mail]'),('Linda','Martins','[e-mail]'),
('Chris','Kay','[e-mail]'),('Christopher','Roberts','[e-mail]'),('Robert','Winston','[e-mail]'),('Daniel','Orbe','[e-mail]'),
('Joshua','Wells','[e-mail]'),('Fred','Flinton','[e-mail]'),('Paula','Winner','[e-mail]'),(NULL,'Canter','[e-mail]'),
('Michael','Bassett','[e-mail]'),('Michelle','Martins','[e-mail]'),('Lorna','Brown','[e-mail]'),('Kerry','Vale','[e-mail]'),
('Sean','Borne','[e-mail]'),('Craig','Evans','[e-mail]'),('Alex','Sanders','[e-mail]'),('George','McNabb','[e-mail]'),
('Richard','Trout','[e-mail]'),('Stewart','Dee','[e-mail]'),('Sue','Werkins','[e-mail]'),('Mel','Wozniack','[e-mail]'),
('Steve','Dole','[e-mail]'),('Zara','Yelland','[e-mail]'),('Irene','Mellon','[e-mail]'),('Karen','Wall','[e-mail]'),
('Lucy','Oak','[e-mail]'),('Orson','Young','[e-mail]'),('Oliver','Daniels','[e-mail]'),('Queen','Bee','[e-mail]'),
('Vera','Jack','[e-mail]'),('Thomas','Soft','[e-mail]'),(NULL,'Blair','[e-mail]'),('Tim','Jones','[e-mail]'),
('Nicola','Jenkins','[e-mail]'),('Olivia','Jones','[e-mail]'),('James','Depp','[e-mail]'),('Meryl','Steep','[e-mail]'),
('Jake','Portman','[e-mail]'),('Jenny','Appleton','[e-mail]'),('Simon','Hoover','[e-mail]'),('Belinda','Marshall','[e-mail]'),
('Stephanie','Watson','[e-mail]'),('Art','Simons','[e-mail]'),('Stan','Smith','[e-mail]'),('Christopher','Roberts','[e-mail]'),
('Nathan','Gold','[e-mail]'),('Alain','Bennet','[e-mail]'),('Lewis','Russelton','[e-mail]'),('Josh','Reynolds','[e-mail]'),
('William','Williams','[e-mail]'),(NULL,'Pointer','[e-mail]'),('Bort','Skinner','[e-mail]'),(NULL,'Smith','[e-mail]'),
('Susan','Williams','[e-mail]'),('Yu','Xi','[e-mail]'),('Annabelle','Winks','[e-mail]'),('Andrew','Landhurst','[e-mail]'),
('Winston','Smith','[e-mail]'),('Gemma','Arton','[e-mail]'),('Renton','McDonald','[e-mail]'),('Maggie','Chu','[e-mail]');
#room
INSERT INTO rooms (name, no_seats) 
VALUES ('Chaplin',72),
('Kubrick',36),
('Coppola',36);
#screening
INSERT INTO screenings (film_id, room_id, start_time)
VALUES (2,1,'2017-10-01 13:00:00'),(1,2,'2017-10-01 13:30:00'),(2,3,'2017-10-01 14:00:00'),
(3,1,'2017-10-01 16:00:00'),(6,2,'2017-10-01 16:30:00'),(3,3,'2017-10-01 17:00:00'),
(4,1,'2017-10-01 19:00:00'),(6,2,'2017-10-01 19:30:00'),(4,3,'2017-10-01 20:00:00'),
(1,1,'2017-10-02 16:00:00'),(4,2,'2017-10-02 16:30:00'),(5,3,'2017-10-02 17:00:00'),
(2,1,'2017-10-02 19:00:00'),(1,2,'2017-10-02 19:30:00'),(1,3,'2017-10-02 20:00:00'),
(5,1,'2017-10-03 16:00:00'),(3,2,'2017-10-03 16:30:00'),(2,3,'2017-10-03 17:00:00'),
(1,1,'2017-10-03 19:00:00'),(2,2,'2017-10-03 19:30:00'),(3,3,'2017-10-03 20:00:00'),
(3,1,'2017-10-04 16:00:00'),(1,2,'2017-10-04 16:30:00'),(4,3,'2017-10-04 17:00:00'),
(2,1,'2017-10-04 19:00:00'),(1,2,'2017-10-04 19:30:00'),(5,3,'2017-10-04 20:00:00'),
(3,1,'2017-10-05 16:00:00'),(4,2,'2017-10-05 16:30:00'),(6,3,'2017-10-05 17:00:00'),
(2,1,'2017-10-05 19:00:00'),(6,2,'2017-10-05 19:30:00'),(3,3,'2017-10-05 20:00:00'),
(1,1,'2017-10-06 16:00:00'),(5,2,'2017-10-06 16:30:00'),(2,3,'2017-10-06 17:00:00'),
(4,1,'2017-10-06 19:00:00'),(2,2,'2017-10-06 19:30:00'),(4,3,'2017-10-06 20:00:00'),
(2,1,'2017-10-07 13:00:00'),(1,2,'2017-10-07 13:30:00'),(2,3,'2017-10-07 14:00:00'),
(3,1,'2017-10-07 16:00:00'),(1,2,'2017-10-07 16:30:00'),(1,3,'2017-10-07 17:00:00'),
(3,1,'2017-10-07 19:00:00'),(2,2,'2017-10-07 19:30:00'),(1,3,'2017-10-07 20:00:00'),
(7,1,'2017-10-08 13:00:00'),(1,2,'2017-10-08 13:30:00'),(1,3,'2017-10-08 14:00:00'),
(7,1,'2017-10-08 16:00:00'),(3,2,'2017-10-08 16:30:00'),(2,3,'2017-10-08 17:00:00'),
(2,1,'2017-10-08 19:00:00'),(5,2,'2017-10-08 19:30:00'),(7,3,'2017-10-08 20:00:00'),
(1,1,'2017-10-09 16:00:00'),(7,2,'2017-10-09 16:30:00'),(8,3,'2017-10-09 17:00:00'),
(3,1,'2017-10-09 19:00:00'),(8,2,'2017-10-09 19:30:00'),(9,3,'2017-10-09 20:00:00'),
(1,1,'2017-10-10 16:00:00'),(6,2,'2017-10-10 16:30:00'),(6,3,'2017-10-10 17:00:00'),
(3,1,'2017-10-10 19:00:00'),(9,2,'2017-10-10 19:30:00'),(6,3,'2017-10-10 20:00:00'),
(8,1,'2017-10-11 16:00:00'),(4,2,'2017-10-11 16:30:00'),(5,3,'2017-10-11 17:00:00'),
(9,1,'2017-10-11 19:00:00'),(3,2,'2017-10-11 19:30:00'),(4,3,'2017-10-11 20:00:00'),
(4,1,'2017-10-12 16:00:00'),(7,2,'2017-10-12 16:30:00'),(6,3,'2017-10-12 17:00:00'),
(3,1,'2017-10-12 19:00:00'),(7,2,'2017-10-12 19:30:00'),(7,3,'2017-10-12 20:00:00'),
(5,1,'2017-10-13 16:00:00'),(2,2,'2017-10-13 16:30:00'),(8,3,'2017-10-13 17:00:00'),
(9,1,'2017-10-13 19:00:00'),(2,2,'2017-10-13 19:30:00'),(9,3,'2017-10-13 20:00:00'),
(1,1,'2017-10-14 13:00:00'),(4,2,'2017-10-14 13:30:00'),(6,3,'2017-10-14 14:00:00'),
(2,1,'2017-10-14 16:00:00'),(1,2,'2017-10-14 16:30:00'),(5,3,'2017-10-14 17:00:00'),
(3,1,'2017-10-14 19:00:00'),(7,2,'2017-10-14 19:30:00'),(7,3,'2017-10-14 20:00:00'),
(2,1,'2017-10-15 13:00:00'),(10,2,'2017-10-15 13:30:00'),(11,3,'2017-10-15 14:00:00'),
(2,1,'2017-10-15 16:00:00'),(10,2,'2017-10-15 16:30:00'),(11,3,'2017-10-15 17:00:00'),
(3,1,'2017-10-15 19:00:00'),(10,2,'2017-10-15 19:30:00'),(11,3,'2017-10-15 20:00:00'),
(1,1,'2017-10-16 16:00:00'),(4,2,'2017-10-16 16:30:00'),(4,3,'2017-10-16 17:00:00'),
(4,1,'2017-10-16 19:00:00'),(4,2,'2017-10-16 19:30:00'),(2,3,'2017-10-16 20:00:00'),
(7,1,'2017-10-17 16:00:00'),(5,2,'2017-10-17 16:30:00'),(1,3,'2017-10-17 17:00:00'),
(8,1,'2017-10-17 19:00:00'),(7,2,'2017-10-17 19:30:00'),(7,3,'2017-10-17 20:00:00'),
(9,1,'2017-10-18 16:00:00'),(8,2,'2017-10-18 16:30:00'),(6,3,'2017-10-18 17:00:00'),
(6,1,'2017-10-18 19:00:00'),(3,2,'2017-10-18 19:30:00'),(5,3,'2017-10-18 20:00:00'),
(5,1,'2017-10-19 16:00:00'),(2,2,'2017-10-19 16:30:00'),(9,3,'2017-10-19 17:00:00'),
(3,1,'2017-10-19 19:00:00'),(4,2,'2017-10-19 19:30:00'),(9,3,'2017-10-19 20:00:00'),
(1,1,'2017-10-20 16:00:00'),(1,2,'2017-10-20 16:30:00'),(8,3,'2017-10-20 17:00:00'),
(2,1,'2017-10-20 19:00:00'),(6,2,'2017-10-20 19:30:00'),(4,3,'2017-10-20 20:00:00'),
(1,1,'2017-10-21 13:00:00'),(9,2,'2017-10-21 13:30:00'),(7,3,'2017-10-21 14:00:00'),
(2,1,'2017-10-21 16:00:00'),(8,2,'2017-10-21 16:30:00'),(2,3,'2017-10-21 17:00:00'),
(3,1,'2017-10-21 19:00:00'),(7,2,'2017-10-21 19:30:00'),(1,3,'2017-10-21 20:00:00'),
(3,1,'2017-10-22 13:00:00'),(11,2,'2017-10-22 13:30:00'),(10,3,'2017-10-22 14:00:00'),
(2,1,'2017-10-22 16:00:00'),(11,2,'2017-10-22 16:30:00'),(10,3,'2017-10-22 17:00:00'),
(4,1,'2017-10-22 19:00:00'),(11,2,'2017-10-22 19:30:00'),(10,3,'2017-10-22 20:00:00'),
(6,1,'2017-10-23 16:00:00'),(6,2,'2017-10-23 16:30:00'),(9,3,'2017-10-23 17:00:00'),
(12,1,'2017-10-23 19:00:00'),(6,2,'2017-10-23 19:30:00'),(9,3,'2017-10-23 20:00:00'),
(5,1,'2017-10-24 16:00:00'),(9,2,'2017-10-24 16:30:00'),(9,3,'2017-10-24 17:00:00'),
(12,1,'2017-10-24 19:00:00'),(8,2,'2017-10-24 19:30:00'),(8,3,'2017-10-24 20:00:00'),
(8,1,'2017-10-25 16:00:00'),(7,2,'2017-10-25 16:30:00'),(7,3,'2017-10-25 17:00:00'),
(9,1,'2017-10-25 19:00:00'),(5,2,'2017-10-25 19:30:00'),(6,3,'2017-10-25 20:00:00'),
(12,1,'2017-10-26 16:00:00'),(7,2,'2017-10-26 16:30:00'),(5,3,'2017-10-26 17:00:00'),
(12,1,'2017-10-26 19:00:00'),(9,2,'2017-10-26 19:30:00'),(12,3,'2017-10-26 20:00:00'),
(5,1,'2017-10-27 16:00:00'),(12,2,'2017-10-27 16:30:00'),(12,3,'2017-10-27 17:00:00'),
(7,1,'2017-10-27 19:00:00'),(12,2,'2017-10-27 19:30:00'),(7,3,'2017-10-27 20:00:00'),
(6,1,'2017-10-28 13:00:00'),(12,2,'2017-10-28 13:30:00'),(5,3,'2017-10-28 14:00:00'),
(5,1,'2017-10-28 16:00:00'),(6,2,'2017-10-28 16:30:00'),(5,3,'2017-10-28 17:00:00'),
(5,1,'2017-10-28 19:00:00'),(7,2,'2017-10-28 19:30:00'),(8,3,'2017-10-28 20:00:00'),
(12,1,'2017-10-29 13:00:00'),(8,2,'2017-10-29 13:30:00'),(9,3,'2017-10-29 14:00:00'),
(12,1,'2017-10-29 16:00:00'),(9,2,'2017-10-29 16:30:00'),(6,3,'2017-10-29 17:00:00'),
(5,1,'2017-10-29 19:00:00'),(5,2,'2017-10-29 19:30:00'),(12,3,'2017-10-29 20:00:00'),
(5,1,'2017-10-30 16:00:00'),(7,2,'2017-10-30 16:30:00'),(12,3,'2017-10-30 17:00:00'),
(5,1,'2017-10-30 19:00:00'),(12,2,'2017-10-30 19:30:00'),(7,3,'2017-10-30 20:00:00'),
(5,1,'2017-10-31 13:00:00'),(12,2,'2017-10-31 13:30:00'),(8,3,'2017-10-31 14:00:00'),
(5,1,'2017-10-31 16:00:00'),(5,2,'2017-10-31 16:30:00'),(9,3,'2017-10-31 17:00:00');

#seats_d
INSERT INTO seats (row1, number, room_id)
VALUES ('A',1,1),('A',2,1),('A',3,1),('A',4,1),('A',5,1),('A',6,1),('A',7,1),('A',8,1),
('B',1,1),('B',2,1),('B',3,1),('B',4,1),('B',5,1),('B',6,1),('B',7,1),('B',8,1),
('C',1,1),('C',2,1),('C',3,1),('C',4,1),('C',5,1),('C',6,1),('C',7,1),('C',8,1),
('D',1,1),('D',2,1),('D',3,1),('D',4,1),('D',5,1),('D',6,1),('D',7,1),('D',8,1),
('E',1,1),('E',2,1),('E',3,1),('E',4,1),('E',5,1),('E',6,1),('E',7,1),('E',8,1),
('F',1,1),('F',2,1),('F',3,1),('F',4,1),('F',5,1),('F',6,1),('F',7,1),('F',8,1),
('G',1,1),('G',2,1),('G',3,1),('G',4,1),('G',5,1),('G',6,1),('G',7,1),('G',8,1),
('H',1,1),('H',2,1),('H',3,1),('H',4,1),('H',5,1),('H',6,1),('H',7,1),('H',8,1),
('I',1,1),('I',2,1),('I',3,1),('I',4,1),('I',5,1),('I',6,1),('I',7,1),('I',8,1),
('A',1,2),('A',2,2),('A',3,2),('A',4,2),('A',5,2),('A',6,2),
('B',1,2),('B',2,2),('B',3,2),('B',4,2),('B',5,2),('B',6,2),
('C',1,2),('C',2,2),('C',3,2),('C',4,2),('C',5,2),('C',6,2),
('D',1,2),('D',2,2),('D',3,2),('D',4,2),('D',5,2),('D',6,2),
('E',1,2),('E',2,2),('E',3,2),('E',4,2),('E',5,2),('E',6,2),
('F',1,2),('F',2,2),('F',3,2),('F',4,2),('F',5,2),('F',6,2),
('A',1,3),('A',2,3),('A',3,3),('A',4,3),('A',5,3),('A',6,3),
('B',1,3),('B',2,3),('B',3,3),('B',4,3),('B',5,3),('B',6,3),
('C',1,3),('C',2,3),('C',3,3),('C',4,3),('C',5,3),('C',6,3),
('D',1,3),('D',2,3),('D',3,3),('D',4,3),('D',5,3),('D',6,3),
('E',1,3),('E',2,3),('E',3,3),('E',4,3),('E',5,3),('E',6,3),
('F',1,3),('F',2,3),('F',3,3),('F',4,3),('F',5,3),('F',6,3);

#b_data
INSERT INTO bookings (screening_id, customer_id)
VALUES (2,2),(1,4),(2,6),(4,8),(6,10),(1,12),(5,14),(1,16),(2,18),(3,20),
(5,120),(4,12),(8,24),(10,33),(9,37),(4,67),(11,87),(4,109),(5,12),(6,21),
(8,11),(10,13),(14,7),(16,103),(18,81),(7,89),(17,52),(7,50),(8,49),(9,37),
(11,1),(16,37),(20,4),(22,23),(21,24),(10,24),(23,24),(10,55),(14,51),(12,69),
(14,3),(22,34),(26,33),(28,35),(27,65),(13,22),(29,22),(13,100),(20,101),(12,58),
(17,5),(28,29),(32,33),(34,45),(33,32),(19,32),(35,30),(16,17),(26,56),(18,55),
(17,7),(31,11),(38,26),(40,4),(30,51),(25,38),(41,37),(22,101),(32,99),(15,76),
(20,9),(37,10),(44,21),(46,55),(33,22),(31,33),(47,44),(25,55),(38,42),(24,1),
(23,11),(37,1),(50,77),(52,23),(39,1),(43,5),(53,89),(28,88),(44,37),(30,2),
(26,12),(40,1),(56,66),(58,27),(42,7),(46,45),(59,22),(31,25),(50,29),(27,9),
(29,14),(43,1),(62,55),(64,11),(45,8),(49,56),(65,11),(37,26),(56,120),(33,1),
(32,15),(49,1),(68,44),(70,11),(51,13),(55,58),(71,1),(49,33),(56,116),(36,103),
(35,17),(55,56),(74,33),(70,17),(54,11),(61,77),(71,45),(58,78),(62,36),(66,9),
(38,19),(61,88),(80,57),(76,120),(66,100),(67,89),(77,49),(58,89),(62,17),(69,61),
(41,100),(67,22),(86,45),(82,119),(72,27),(73,90),(80,56),(61,68),(68,20),(33,9),
(44,66),(76,119),(92,82),(88,100),(81,89),(79,5),(83,65),(64,42),(74,80),(42,26),
(47,45),(82,118),(98,67),(94,11),(81,55),(82,4),(83,23),(67,4),(86,80),(45,19),
(50,44),(88,117),(104,61),(100,97),(81,35),(85,3),(89,35),(76,41),(86,90),(48,17),
(53,33),(94,116),(110,4),(106,54),(84,33),(88,2),(95,34),(76,27),(86,29),(51,28),
(56,39),(97,115),(116,4),(112,32),(90,33),(88,1),(101,34),(82,90),(86,101),(51,104),
(59,111),(100,114),(122,7),(118,35),(93,57),(88,77),(107,69),(91,96),(92,4),(54,35),
(92,100),(106,113),(128,9),(124,60),(87,88),(91,39),(113,67),(91,43),(98,90),(60,36),
(98,99),(112,112),(134,10),(130,43),(69,84),(97,31),(119,1),(97,3),(104,7),(63,1),
(104,4),(118,111),(140,1),(136,22),(72,67),(97,111),(125,87),(100,24),(110,46),(66,4),
(110,17),(130,110),(146,12),(142,22),(75,48),(100,111),(131,47),(103,24),(122,27),(69,27),
(122,55),(136,91),(152,11),(148,13),(84,90),(103,101),(137,12),(109,11),(128,10),(75,9),
(128,58),(142,90),(158,56),(154,15),(93,91),(109,34),(143,9),(115,34),(131,33),(78,81),
(134,88),(148,48),(164,78),(160,16),(102,22),(115,33),(149,47),(121,46),(137,6),(90,6),
(140,67),(154,40),(170,77),(166,78),(108,21),(121,26),(155,53),(127,42),(143,31),(99,11),
(152,45),(160,70),(176,38),(172,66),(114,20),(127,106),(161,111),(211,109),(149,108),(102,113),
(158,44),(166,87),(182,99),(178,65),(120,19),(136,99),(167,49),(133,66),(158,67),(117,3),
(164,71),(172,33),(188,100),(184,50),(144,18),(142,23),(173,46),(139,23),(164,1),(129,3),
(170,78),(178,35),(194,36),(187,23),(159,24),(151,23),(179,55),(145,58),(170,60),(141,4),
(176,70),(184,7),(200,36),(190,78),(162,70),(157,80),(182,99),(151,95),(176,32),(156,7),
(182,88),(190,8),(200,34),(193,74),(168,35),(163,120),(185,109),(157,31),(182,68),(180,56),
(191,47),(190,16),(200,1),(196,72),(177,11),(169,12),(191,19),(166,108),(176,23),(189,23),
(197,32),(196,26),(203,2),(199,80),(192,4),(175,49),(197,55),(172,76),(188,99),(195,90),
(200,23),(199,43),(206,3),(202,90),(198,59),(181,58),(200,59),(178,6),(194,35),(198,44),
(203,116),(202,28),(209,4),(205,93),(201,23),(187,10),(203,76),(187,77),(200,78),(204,9),
(209,18),(205,10),(209,5),(208,43),(204,67),(193,54),(206,54),(196,1),(206,7),(207,9),
(212,68),(211,5),(212,6),(211,7),(207,8),(199,9),(209,9),(205,23),(212,111),(213,40);
# rs
INSERT INTO reserved_seat (booking_id, seat_id) 
VALUES (1,74),(1,75),(1,76),(2,10),(2,11),(3,100),(3,101),(4,66),(4,67),(5,141),
(6,33),(6,34),(7,102),(7,103),(8,2),(8,3),(8,4),(8,5),(9,98),(9,99),
(10,120),(11,74),(11,75),(11,76),(12,23),(12,24),(13,104),(13,105),(14,60),(14,61),
(15,130),(15,131),(16,71),(16,72),(17,88),(17,89),(18,51),(18,52),(18,53),(18,54),
(19,83),(19,84),(20,138),(21,94),(22,30),(22,31),(22,32),(23,101),(23,102),(23,103),
(23,75),(24,67),(24,68),(25,113),(25,114),(26,44),(27,97),(27,98),(28,71),(29,76),
(30,139),(31,79),(32,50),(33,80),(33,81),(33,82),(33,83),(33,84),(34,62),(34,63),
(35,120),(35,121),(36,16),(36,17),(37,82),(37,83),(38,59),(39,78),(40,111),(40,112),
(41,90),(41,91),(41,92),(42,52),(42,53),(42,54),(43,89),(43,90),(44,71),(44,72),
(45,120),(45,121),(46,38),(46,39),(47,101),(47,102),(48,62),(48,63),(48,64),(49,81),
(50,121),(50,122),(50,123),(50,124),(51,91),(51,92),(51,93),(51,94),(52,61),(52,62),
(53,107),(53,108),(54,67),(54,68),(55,117),(55,118),(56,61),(57,104),(57,105),(57,106),
(58,1),(58,2),(59,75),(59,76),(60,139),(60,140),(61,86),(61,87),(62,13),(62,14),
(63,101),(63,102),(63,103),(64,66),(64,67),(64,68),(65,120),(65,121),(65,122),(65,123),
(66,9),(66,10),(67,76),(68,48),(68,49),(68,50),(69,93),(69,94),(70,121),(70,122),
(71,80),(71,81),(71,82),(72,67),(72,68),(73,77),(73,78),(74,61),(74,62),(74,63),
(75,130),(75,131),(76,9),(76,10),(77,100),(78,57),(79,107),(80,110),(81,91),(81,92),
(82,5),(82,6),(83,104),(83,105),(84,23),(84,24),(85,118),(85,119),(85,120),(85,121),
(86,31),(86,32),(87,76),(87,77),(88,63),(89,89),(89,90),(89,91),(90,113),(90,114),
(91,79),(91,80),(91,81),(92,1),(92,2),(92,3),(92,4),(92,5),(92,6),(93,105),
(94,12),(94,13),(94,14),(95,111),(95,112),(95,113),(95,114),(96,59),(96,60),(96,61),
(97,81),(97,82),(98,47),(98,48),(99,85),(99,86),(100,118),(100,119),(101,103),(101,104),
(102,23),(102,24),(103,81),(103,82),(104,66),(104,67),(105,136),(105,137),(106,39),(106,40),
(107,75),(108,72),(109,101),(109,102),(109,103),(109,104),(109,105),(110,122),(110,123),(110,124),
(111,77),(111,78),(112,8),(113,82),(113,83),(114,56),(114,57),(115,139),(115,140),(116,69),
(117,75),(117,76),(117,77),(118,60),(119,88),(120,111),(121,108),(122,31),(122,32),(123,98),
(124,18),(124,19),(125,120),(125,121),(126,61),(126,62),(127,101),(127,102),(128,70),(128,71),
(129,105),(129,106),(130,141),(130,142),(131,77),(132,71),(133,106),(133,107),(133,108),(134,61),
(135,110),(135,111),(136,52),(137,84),(137,85),(138,37),(139,75),(139,76),(140,140),(140,141),
(141,90),(142,42),(143,94),(143,95),(144,66),(145,112),(146,21),(147,79),(147,80),(147,81),
(148,63),(149,89),(150,128),(150,129),(151,77),(151,78),(151,79),(152,57),(152,58),(152,59),
(153,89),(153,90),(153,91),(154,37),(154,38),(155,111),(155,112),(155,113),(156,19),(156,20),
(157,83),(158,5),(159,77),(160,140),(161,89),(162,9),(163,104),(164,71),(165,117),(165,118),
(166,66),(166,67),(167,83),(167,84),(167,85),(167,86),(168,55),(168,56),(168,57),(168,58),
(169,105),(169,106),(170,121),(170,122),(171,92),(172,36),(173,99),(174,38),(175,117),(175,118),
(176,68),(176,69),(177,81),(177,82),(178,31),(178,32),(179,103),(179,104),(180,119),(181,102),
(182,71),(182,72),(183,100),(183,101),(184,48),(184,49),(185,110),(185,111),(186,12),(186,13),
(187,78),(187,79),(188,39),(189,81),(190,135),(191,79),(192,33),(192,34),(192,35),(193,90),
(194,54),(194,55),(195,121),(195,122),(196,53),(196,54),(197,80),(197,81),(198,2),(198,3),
(199,81),(199,82),(200,115),(201,76),(202,27),(203,103),(203,104),(204,22),(205,140),(206,51),
(207,83),(208,64),(209,98),(210,118),(211,101),(212,61),(212,62),(213,79),(213,80),(214,50),
(215,111),(216,30),(216,31),(217,106),(217,107),(218,40),(218,41),(219,91),(219,92),(220,123),
(221,76),(222,20),(222,21),(223,105),(224,60),(225,133),(225,134),(226,70),(226,71),(226,72),
(227,83),(228,47),(229,80),(230,120),(230,121),(231,85),(231,86),(232,11),(232,12),(232,13),
(233,81),(233,82),(234,62),(234,63),(235,113),(235,114),(236,35),(236,36),(237,81),(237,82),
(238,41),(238,42),(239,77),(239,78),(240,129),(241,102),(241,103),(242,21),(242,22),(242,23),
(243,89),(244,45),(245,137),(245,138),(245,139),(245,140),(246,49),(246,50),(246,51),(247,101),
(248,34),(249,77),(250,138),(251,102),(251,103),(251,104),(252,61),(253,98),(253,99),(254,70),
(255,119),(255,120),(255,121),(256,23),(257,87),(258,36),(258,37),(259,95),(259,96),(260,132),
(261,88),(261,89),(261,90),(262,20),(262,21),(262,22),(262,23),(263,102),(264,63),(265,118),
(266,24),(267,79),(268,68),(269,90),(269,91),(270,120),(271,104),(272,8),(273,76),(274,33),
(275,122),(275,123),(275,124),(276,11),(276,12),(276,13),(277,82),(277,83),(278,27),(278,28),
(279,75),(279,76),(279,77),(280,140),(280,141),(281,80),(282,26),(283,100),(283,101),(283,102),
(284,23),(284,24),(285,121),(286,68),(287,78),(288,4),(288,5),(289,97),(290,113),(290,114),
(291,81),(291,82),(292,49),(293,85),(294,39),(295,140),(296,68),(297,82),(298,25),(298,26),
(299,83),(299,84),(300,134),(300,135),(301,101),(301,102),(302,56),(302,57),(303,92),(303,93),
(304,5),(305,112),(305,113),(306,61),(306,62),(307,81),(308,72),(309,88),(309,89),(310,123),
(311,97),(311,98),(311,99),(312,39),(312,40),(313,79),(314,61),(314,62),(315,144),(316,55),
(317,81),(317,82),(318,66),(319,101),(320,129),(321,83),(321,84),(322,13),(322,14),(322,15),
(323,89),(323,90),(324,37),(324,38),(325,115),(325,116),(326,68),(326,69),(326,70),(327,108),
(328,61),(329,77),(330,125),(330,126),(331,91),(331,92),(332,58),(332,59),(333,76),(333,77),
(334,23),(334,24),(335,131),(335,132),(336,10),(336,11),(337,99),(337,100),(338,67),(338,68),
(339,101),(339,102),(340,138),(341,105),(342,3),(342,4),(343,74),(343,75),(344,58),(344,59),
(345,122),(345,123),(346,34),(346,35),(347,79),(347,80),(348,27),(348,28),(348,29),(349,77),
(350,112),(350,113),(351,83),(351,84),(352,67),(352,68),(352,69),(353,101),(353,102),(353,103),
(354,13),(355,113),(355,114),(356,45),(357,90),(358,70),(359,79),(360,138),(361,97),(362,72),
(363,80),(364,54),(365,122),(366,30),(367,89),(368,48),(369,103),(370,110),(371,88),(372,62),
(373,81),(373,82),(374,59),(375,140),(376,70),(377,93),(378,23),(378,24),(378,25),(378,26),
(379,79),(379,80),(379,81),(380,118),(380,119),(381,103),(382,66),(382,67),(382,68),(382,69),
(383,77),(384,41),(384,42),(384,43),(385,125),(386,68),(387,84),(388,70),(388,71),(389,95),
(390,120),(390,121),(390,122),(391,76),(391,77),(391,78),(392,8),(392,9),(392,10),(393,103),
(394,39),(394,40),(395,127),(395,128),(395,129),(396,66),(396,67),(397,85),(397,86),(398,58),
(399,83),(399,84),(400,118),(400,119),(400,120),(401,103),(401,104),(401,105),(402,51),(403,75),
(404,34),(404,35),(405,109),(405,110),(405,111),(406,72),(407,93),(407,94),(408,49),(409,88),
(410,117),(410,118),(410,119);

Aggregate data

show databases;
create database rough;
use cinema_booking_system;
select * from customers;
select count(*) from customers;
select sum(no_seats) from rooms;
select max(lenght_min) from films;
select avg(lenght_min) from films;

Subqueries

use cinema_booking_system;
select id, start_time from screenings where film_id in (select id from films where lenght_min>120); # Non correlated
select * from screenings;
select * from films;
select * from reserved_seat;
select screening_id, customer_id,(select count(seat_id) from reserved_seat where booking_id=b.id) from bookings b; #correlated

Concatenation

# concatenate
select concat(first_name,' ',last_name,' ',email) as name from customers;

Substring

# substring(string,start,length) and sub is col name or substr()
select substring("Hello world",2,7) as sub;
select substring("Hello world",-2,7) as sub; # start from last 2nd move till end which is d
select substr(name,1,5) as short_string from films;

Upper case and Lower case

#upper and lower
select upper(name) from films;
select lower(name) from films;
select upper(name) as upper_name from films;

date month and year

# date
select date('2022-02-17 07:45:32');
select date(start_time) as date from screenings;
select * from screenings where date(start_time) between '2017-10-03' and '2017-10-05';
# month
select month('2022-02-17 07:45:32') as month_1;

# year
select year('2022-02-17 07:45:32') as yearly;