Update lab1.sql

lab_ans/lab1.sql

@@ -1,30 +1,132 @@
-show tables;
-drop table  if exists Albums, Artists, Users; 
-create table Albums(AlbumID varchar(20),
-AlbumName varchar(20) not null, 
-ArtistName varchar(20) not null, 
-HoursStreamed int DEFAULT 0,
-Label varchar(20) ,
-Genre varchar(20), 
-ReleaseDate date not null, 
-constraint primary key(AlbumID));
-
-
-create table Artists(ArtistID varchar(20),
-Name varchar(20) not null, 
-ActiveSince date not null,
-RetirementDate date,
-NumberOfFollowers int DEFAULT 0,
-Nationality varchar(20),
-constraint primary key(ArtistID));
-
-
-create table Users(UserID varchar(20), 
-UserName varchar(20) not null,
-EmailID varchar(230),
-MembershipCategory ENUM('P', 'F') not null ,
-constraint unique(EmailID), primary key(UserID, UserName));
-
-desc Albums;
+drop database if exists lab1;
+create database lab1;
+	connect lab1;
+	use lab1;
+	show tables;
+	drop table  if exists Albums,Artists,Users;
+	create table Albums(
+		AlbumId VARCHAR(15),
+		AlbumName VARCHAR(15) NOT NULL,
+		ArtistName VARCHAR(15) NOT NULL,
+		HoursStreamed INT DEFAULT 0,
+		Label VARCHAR(15),
+        Genre VARCHAR(15),
+        ReleaseDate date NOT NULL,
+        primary key(AlbumId)
+	);
+
+create table Artists(
+		ArtistId VARCHAR(15),
+		Name VARCHAR(15) NOT NULL,
+		ActiveSince date NOT NULL,
+		RetirementDate date,
+		NumberOfFollowers INT NOT NULL,
+        Nationality VARCHAR(15) NOT NULL,
+        primary key(ArtistId)
+	);
+
+
+	create table Users(
+		UserId VARCHAR(15),
+	    UserName VARCHAR(15),
+		EmailID VARCHAR(25) NOT NULL,
+		MembershipCategory ENUM('P','F') DEFAULT 'F' NOT NULL,
+		CONSTRAINT ue UNIQUE(EmailID),
+        primary key(UserId,UserName)
+	);	
+
+	desc Albums;
+	desc Artists;
+	desc Users;
+
+	alter table Users change MembershipCategory AccountType ENUM('P','F') DEFAULT 'F' NOT NULL;
+
+	desc Users;
+	desc Artists;
+	alter table Artists drop column Nationality;
+
+   desc Artists;
+
+   desc Albums;
+
+   alter table Albums modify  HoursStreamed FLOAT(10,2);
+
+   desc Albums;
+
+insert into Albums(AlbumID,ArtistName,AlbumName,HoursStreamed,Label,Genre,ReleaseDate)
+	Values('39391', 'Linkin Park', 'A Thousand Suns', 128, 'Warner Bros', 'Rock', '2016/06/17');
+
+insert into Albums(AlbumID,ArtistName,AlbumName,HoursStreamed,Label,Genre,ReleaseDate)
+	Values('14573', 'Maroon 5', 'Overexposed', 452, 'A&M', 'Funk', '2016/11/11');
+
+	insert into Albums(AlbumID,ArtistName,AlbumName,HoursStreamed,Label,Genre,ReleaseDate)
+	Values( '24573', 'Maroon', 'Overexposed', 400, 'A&M', 'Funk', '2016/11/30');
+
+insert into Artists(ArtistID,Name,ActiveSince,RetirementDate,NumberOfFollowers)
+	Values('100', 'Maroon 5', '2007/11/13', NULL, 16000123);
+
+
+insert into Artists(ArtistID,Name,ActiveSince,RetirementDate,NumberOfFollowers)
+	Values( '101', 'Linkin Park', '2000/02/14', '2017/07/20', 21174672);
+
+
+insert into Artists(ArtistID,Name,ActiveSince,RetirementDate,NumberOfFollowers)
+	Values('102', 'Eminem', '2001/01/15', NULL, 14093412);
+
+
+insert into Artists(ArtistID,Name,ActiveSince,RetirementDate,NumberOfFollowers)
+	Values('103', 'Coldplay', '2002/05/13', NULL, 18000992);
+
+insert into Users(UserID,UserName,EmailID,AccountType)
+	Values('10003', 'Anurag Dwivedi', 'adwivedi@gmail.com', 'F');
+
+
+insert into Users(UserID,UserName,EmailID,AccountType)
+	Values( '10004', 'Sana Kothari', 'sana123@gmail.com', 'P');
+
+
+insert into Users(UserID,UserName,EmailID)
+	Values('10005', 'Vishal Ghosh', 'vishy@gmail.com');
+
+-- select * from Albums;
+-- select * from Artists;
+-- select * from Users;
+
+select distinct Label from Albums;
+select * from Users as U where U.AccountType='P';
+
+select AlbumName from Albums where ArtistName='Maroon 5' and Genre='Rock';
+
+select HoursStreamed from Albums;
+update Albums set HoursStreamed=HoursStreamed+200 where Genre='Rock';
+select HoursStreamed from Albums;
+
+alter table Artists add column Duration Int NOT NULL;
 desc Artists;
-desc Users;
+
+select * from Albums;
+DELETE from Albums where HoursStreamed>400;
+select * from Albums;
+
+select HoursStreamed,AlbumName from Albums;
+select HoursStreamed*1.20,AlbumName from Albums;
+select NumberOfFollowers from Artists where ArtistId='100';
+Update Artists set NumberOfFollowers=NumberOfFollowers+200 where ArtistId='100';
+select NumberOfFollowers from Artists where ArtistId='100';
+
+select * from Artists;
+update Artists set Duration=CURDATE()-ActiveSince;
+select * from Artists;	
+
+select sysdate() from dual;
+
+select curdate() from dual;
+
+
+select * from Albums;
+select AlbumName from Albums where Genre='Rock'
+union
+select AlbumName from Albums where Genre='Funk';
+-- ALSO A POSSIBLE ANS TO 22 LAB1
+-- 
+-- select ALbumName from Albums as A where A.Genre IN ('Rock','Funk');