added dml commands

Author: AnuragAnalog

dml-commands.sql

@@ -0,0 +1,35 @@
+
+-- 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
+);
+
+-- complete insert (1st method)
+insert into employee (employee_id, first_name, last_name, dept_number, age, salary) values (1, "Anurag", "Peddi", 1, 20, 93425.63);
+
+-- complete insert (2nd method)
+insert into employee values (2, "Anuhya", "Peddi", 2, 20, 83425.63);
+
+-- insert partially
+insert into employee (employee_id, first_name) values (3, "Vageesh");
+
+-- updating all rows
+update employee set salary = 1.1 * salary;
+
+-- updating a specified row
+update employee set salary = 1.2 * salary where employee_id = 1;
+
+-- delete a specified row
+delete from employee where employee_id = 2;
+
+-- delete all rows
+delete from employee;