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+## Creating database
+
+```sql
+CREATE DATABASE Database_A3;
+USE Database_A3;
+
+```
+
+## Creating tables and specify primary keys:
+
+```sql
+CREATE TABLE Account(acc_no INT, branch_name VARCHAR(50), balance INT, PRIMARY KEY (acc_no));
+CREATE TABLE Branch(branch_name VARCHAR(50), branch_city VARCHAR(50), assets INT, PRIMARY KEY (branch_name));
+CREATE TABLE Customer (cust_name VARCHAR(50), cust_street VARCHAR(50), cust_city VARCHAR(50), PRIMARY KEY (cust_name));
+CREATE TABLE Depositor (cust_name VARCHAR(50), acc_no INT);
+CREATE TABLE Loan (loan_no INT, branch_name VARCHAR(50), amount INT, PRIMARY KEY (loan_no));
+CREATE TABLE Borrower (cust_name VARCHAR(50), loan_no INT);
+
+```
+
+## Altering tables to specify foreign keys
+
+```sql
+ALTER TABLE Account ADD FOREIGN KEY (branch_name) REFERENCES Branch(branch_name);
+ALTER TABLE Depositor ADD FOREIGN KEY (cust_name) REFERENCES Customer (cust_name);
+ALTER TABLE Depositor ADD FOREIGN KEY (acc_no) REFERENCES Account (acc_no);
+ALTER TABLE Loan ADD FOREIGN KEY (branch_name) REFERENCES Branch (branch_name);
+ALTER TABLE Borrower ADD FOREIGN KEY (cust_name) REFERENCES Customer (cust_name);
+ALTER TABLE Borrower ADD FOREIGN KEY (loan_no) REFERENCES Loan (loan_no);
+
+```
+
+## Adding data
+
+```sql
+INSERT INTO Branch (branch_name, branch_city, assets) VALUES
+("Pune_Station", "Pune", 5000),
+("Hadapsar", "Pune", 20000),
+("Dhole_Patil", "Mumbai", 7500),
+("Nagarwala", "Nandurbar", 3200);
+
+INSERT INTO Customer (cust_name, cust_street, cust_city) VALUES
+("Kalas", "Airport Road", "Pune"),
+("Mehul", "Shahdha", "Nandurbar"),
+("Tanmay", "Porwal Road", "Pune"),
+("Kshitij", "Hadapasar", "Pune"),
+("Aditya", "Mira RD", "Mumbai"),
+("Himanshu", "Smart City", "Nandurbar");
+
+INSERT INTO Account (acc_no, branch_name, balance) VALUES
+(2501, "Dhole_Patil", 5000),
+(2511, "Pune_Station", 1500),
+(2521, "Hadapsar", 2000),
+(2512, "Nagarwala", 5000),
+(2531, "Pune_Station", 1000);
+
+INSERT INTO Loan (loan_no, branch_name, amount) VALUES
+(155, "Dhole_Patil", 500),
+(156, "Pune_Station", 250),
+(157, "Hadapsar", 600),
+(158, "Nagarwala", 1400),
+(159, "Pune_Station", 25000);
+
+INSERT INTO Borrower VALUES
+("Kalas", 156),
+("Mehul", 158),
+("Tanmay", 155),
+("Kshitij", 157),
+("Aditya", 159),
+("Himanshu", 158);
+
+INSERT INTO Depositor VALUES
+("Kalas", 2511),
+("Mehul", 2512),
+("Tanmay", 2501),
+("Kshitij", 2521),
+("Aditya", 2531),
+("Himanshu", 2512);
+
+```
+
+## Queries
+
+### Part 1 (Borrower):
+
+1. Create a View1 to display List all customers in alphabetical order who have loan from
+Pune_Station branch
+```sql
+CREATE VIEW View1 AS
+SELECT cust_name
+FROM Borrower
+INNER JOIN Loan ON Borrower.loan_no = Loan.loan_no
+WHERE branch_name = "Pune_Station"
+ORDER BY cust_name;
+SELECT * FROM View1;
+
+```
+
+2. Create View2 on branch table by selecting any two columns and perform insert
+update delete operations.
+```sql
+CREATE VIEW View2 AS
+SELECT branch_name, branch_city
+FROM Branch;
+SELECT * FROM View2;
+
+-- Insert operation
+INSERT INTO View2 (branch_name, branch_city) VALUES ('Yerwada', 'Pune');
+SELECT * FROM View2;
+
+-- Update operation
+UPDATE View2 SET branch_name = 'Peachtree' WHERE branch_name = 'Yerwada';
+SELECT * FROM View2;
+
+-- Delete operation
+DELETE FROM View2 WHERE branch_name = 'Peachtree';
+SELECT * FROM View2;
+
+```
+
+3. Create View3 on borrower and depositor table by selecting any one column from each
+table perform insert update delete operations.
+```sql
+CREATE VIEW View3 AS
+SELECT Borrower.cust_name, Depositor.acc_no
+FROM Borrower JOIN Depositor ON Borrower.cust_name = Depositor.cust_name;
+SELECT * FROM View3;
+
+-- Insert operation
+// NEED TO FIX THIS
+INSERT INTO Customer (cust_name, cust_street, cust_city) VALUES ("Sandy", "Pedgaon", "Ahemadnagar");
+INSERT INTO Borrower (cust_name, loan_no) VALUES ("Sandy", 160);
+INSERT INTO Depositor(cust_name, Acc_no) VALUES("Sandy", 2502);
+SELECT * FROM View3;
+
+-- Update operation
+UPDATE View3 SET acc_no = 102 WHERE cust_name = 'John_Doe';
+SELECT * FROM View3;
+
+-- Delete operation
+DELETE FROM View3 WHERE cust_name = 'John_Doe';
+SELECT * FROM View3;
+//
+```
+
+4. Create Union of left and right joint for all customers who have an account or loan or both at bank
+```sql
+SELECT DISTINCT Customer.cust_name
+FROM Customer
+LEFT JOIN Depositor ON Customer.cust_name = Depositor.cust_name
+LEFT JOIN Borrower ON Customer.cust_name = Borrower.cust_name
+WHERE Depositor.acc_no IS NOT NULL OR Borrower.loan_no IS NOT NULL;
+
+```
+
+5. Display content of View1, View2, View3
+```sql
+SELECT * FROM View1;
+SELECT * FROM View2;
+SELECT * FROM View3;
+
+```
+
+6. Create Simple and Unique index
+```sql
+-- Simple Index
+CREATE INDEX cust_ind ON Customer (cust_city);
+
+-- Unique Index
+CREATE UNIQUE INDEX branch_ind ON Branch (branch_name);
+
+```
+
+7. Display index Information
+```sql
+SHOW INDEX FROM Customer;
+SHOW INDEX FROM Branch;
+
+```
+
+8. Truncate table Customer
+```sql
+DROP TABLE Depositor;
+DROP TABLE Borrower;
+TRUNCATE TABLE Customer;
+
+```
+
+### Part 2:
+
+#### Create tables
+```sql
+CREATE TABLE Companies(comp_id varchar(50), name varchar(50), cost int, year int);
+CREATE TABLE Orders(comp_id varchar(50), domain varchar(50), quantity int);
+
+```
+
+#### Insert values
+```sql
+INSERT INTO Companies (comp_id, name, cost, year) VALUES
+("C001", "ONGC", 2000, 2010),
+("C002", "HPCL", 2500, 2012),
+("C005", "IOCL", 1000, 2014),
+("C006", "BHEL", 3000, 2015);
+
+INSERT INTO Orders (comp_id, domain, quantity) VALUES
+("C001", "Oil", 109),
+("C002", "Gas", 121),
+("C005", "Telecom", 115);
+
+```
+
+#### Queries
+1. Find names, costs, domains and quantities for companies using inner join.
+```sql
+SELECT name, cost, domain, quantity FROM Companies INNER JOIN Orders on Companies.comp_id = Orders.comp_id;
+
+```
+
+2. Find names, costs, domains and quantities for companies using left outer join.
+```sql
+SELECT name, cost, domain, quantity FROM Companies lEFT OUTER JOIN Orders ON Companies.comp_id = Orders.comp_id;
+
+```
+
+3. Find names, costs, domains and quantities for companies using right outer join.
+```sql
+SELECT name, cost, domain, quantity FROM Companies RIGHT OUTER JOIN Orders ON Companies.comp_id = Orders.comp_id;
+
+```
+
+4. Find names, costs, domains and quantities for companies using Union operator.
+```sql
+SELECT name, cost FROM Companies UNION SELECT domain, quantity FROM Orders;
+
+```
+
+5. Create View View1 by selecting both tables to show company name and quantities.
+```sql
+CREATE VIEW view1 AS SELECT name, quantity FROM Companies JOIN Orders ON Companies.comp_id = Orders.comp_id;
+
+```
+
+6. Create View2 on branch table by selecting any two columns and perform insert update delete operations.
+```sql
+CREATE VIEW view2 AS SELECT name, cost FROM Companies;
+SELECT * FROM view2;
+
+-- Insert operation
+INSERT INTO view2 (name, cost) VALUES ("BCCC", 3100);
+SELECT * FROM view2;
+
+-- Update operation
+UPDATE view2 SET cost = 3500 WHERE name = "BCCC";
+SELECT * FROM view2;
+
+-- Delete operation
+DELETE FROM view2 WHERE name = "BCCC";
+SELECT * FROM view2;
+
+```
+
+7. Display content of View1, View2.
+```sql
+SELECT * from view1;
+SELECT * FROM view2;
+
+```
+
+---