Experiment No. 1
Q-1> Write a query in sql to create a table employee and department.
Employee(empno,ename,deptno,job,hiredate)
Dept(deptno,dname,loc)
Include the following constraints on column of emp table.
a) to make the empno as primary key of the table and
b) to ensure that the ename column does not contain NULL values and
c) the job column to have only UPPERCASE entries and
d) to put the current date as default date in hire date column in case data is not supplied for the column.
Include the following constraints on column of dept table.
a) to make deptno as primary key.
b) to ensure dname,loc coloumns does not contain NULL values
Also enforce REFERENTIAL INTEGRITY, declare deptno field of dept table as primary key and deptno field of emp table as foreign key.
Q-2> Modify the above table to add three more columns salary,mgr,comm to the emp table. add salary column with constraint greater than zero and modify the width of sal column.
Q-3> Insert following values in employee table.
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
7369 SMITH CLERK 7902 17-DEC-80 800 20
7499 ALLEN SALESMAN 7698 20-FEB-81 1600 300 30
7521 WARD SALESMAN 7698 22-FEB-81 1250 500 30
7566 JONES MANAGER 839 02-APR-81 2975 20
7654 MARTIN SALESMAN 7698 28-SEP-81 1250 1400 30
7698 BLAKE MANAGER 7839 01-MAY-81 2850 30
7782 CLARK MANAGER 7839 09-JUN-81 2450 10
7788 SCOTT ANALYST 7566 19-APR-87 3000 20
7839 KING PRESIDENT 17-NOV-81 5000 10
7844 TURNER SALESMAN 7698 08-SEP-81 1500 0 30
7876 ADAMS CLERK 7788 23-MAY-87 1100 20
7900 JAMES CLERK 7698 03-DEC-81 950 30
7902 FORD ANALYST 7566 03-DEC-81 3000 20
7934 MILLER CLERK 7782 23-JAN-82 1300 10
Q-4> Edit the commission of JONES to 1000.
Q-5> Retrieve all rows of employee table.
Q-6> Delete row from employee table where deptno is 10.
Q-7> Delete all rows from employee table then Drop the emp table.
