Queries changes added

src/main/java/org/example/Queries/queries.sql

+INSERT COMMAND:
+insert into employee(id,name,age,salary)values(101,'Rohan',24,54600);
+insert into employee(id,name,age,salary)values(102,'Aishwarya',24,54600);
+insert into employee(id,name,age,salary)values(103,'Archana',24,54600);
+insert into employee(id,name,age,salary)values(104,'Vidya',24,54600);
+
+select * from employee
+ id  |   name    | age | salary
+-----+-----------+-----+--------
+ 101 | Rohan     |  20 |  50000
+ 102 | Aishwarya |  21 |  75000
+ 103 | Archana   |  25 |  45000
+ 104 | Vidya     |  24 |  54600
+(4 rows)
+
+UPDATE Command:
+update employee set name='Vidhu' where id=104;
+select * from employee
+ id  |   name    | age | salary
+-----+-----------+-----+--------
+ 101 | Rohan     |  20 |  50000
+ 102 | Aishwarya |  21 |  75000
+ 103 | Archana   |  25 |  45000
+ 104 | Vidhu     |  24 |  54600
+(4 rows)
+
+SELECT Command:
+
+rohan=> select id,name from employee where salary>47000;
+ id  |   name
+-----+-----------
+ 101 | Rohan
+ 102 | Aishwarya
+ 104 | Vidhu
+(3 rows)
+
+
+DELETE Command:
+delete from employee where age=23;
+select * from employee
+;
+ id  |   name    | age | salary
+-----+-----------+-----+--------
+ 101 | Rohan     |  20 |  50000
+ 102 | Aishwarya |  21 |  75000
+ 103 | Archana   |  25 |  45000
+(3 rows)