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views.sql
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views.sql
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-- creating basic stuff to work on them
create database cheatsheet;
use cheatsheet;
create table employee
(
employee_id int primary key, -- Setting primary key(1st method)
first_name varchar(50),
last_name varchar(50),
dept_number int,
age int,
salary real
);
insert into employee (employee_id, first_name, last_name, dept_number, age, salary) values (1, "Anurag", "Peddi", 1, 20, 93425.63);
insert into employee values (2, "Anuhya", "Peddi", 2, 40, 83425.63);
insert into employee values (3, "Vageesh", "Padigela", 3, 50, 83625.63);
insert into employee values (4, "Rishi", "Kumar", 5, 25, 83765.23);
insert into employee values (5, "Ashish", "Gupta", 4, 36, 103425.63);
insert into employee values (6, "Akash", "Pippera", 6, 71, 113425.63);
-- create a view
create view personal_info as select first_name, last_name, age from employees;
-- displaying view
select * from personal_info;
-- updating in view
update personal_info set salary = 1.1 * salary;
-- deleting record from view
delete from personal_info where age < 40;
-- droping a view
drop view personal_info;