LA-2 (Constraints, Operators and Functions)
Exercise: I
Aim: To know how the constraints are used to make table is consistent.
Table Name: Employee
Attribute
First Name
Mid Name
Last Name
SSN Number
Birthday
Address
Sex
Salary
Supervisor SSN
Data Type
Varchar (15)
Char(2)
Varchar (15)
Char (9)
Date
Varchar (50)
Char(1)
Number (7)
Char (9)
Department number
Number(5)
Constraint
Not Null
Not Null
Primary Key
Sex In (M,F,m,f)
Default 800
Foreign Key Employee (SSN)
on delete set null
Foreign key to department
number of department table on
delete cascade
Table Name : Department
Attribute
Department Name
Department number
Manager SSN
Data type
Varchar(15)
INT(5)
Char (9)
Manage start date
Date
Constraint
Not Null
Primary key
Foreign key-Employee (SSN)
on delete set null
Table Name : Dept_locations
Attribute
Department Number
Number(5)
Data type
Department Location
Varchar (15)
Constraint
Department (dep no) onDelete
Cascade
Table Name: Project
Attribute
Project Name
Project number
Project Location
Department Number
Data type
Varchar2(15)
Number(5)
Varchar2(50)
Number(5)
Constraint
Not Null
Primary key
Foreign Key –Department (dep
no ) on delete set null
Table Name: Works_On
The combination of Employee SSN and Project Number must be a Primary Key
Attribute
Employee SSN
Data type
Char (9)
Project number
INT(5)
Hours
Decimal (3,1)
Constraint
Foreign Key
Employee (SSN) on delete cascade
Foreign Key project ( Pnumber ) on
delete cascade
Not null
Name: Dependent
The combination of Employee SSN and Dependent Name must be a Primary Key.
Attribute
Employee
Datatype
Char (9)
Dependent Name
Sex
Birthday
Relationship
Varchar(15)
Char(1)
Date
Varchar(8)
Data for table - Dept_Locations
Dep No
1
1
2
2
3
4
4
5
5
D Location
Houston
Chicago
New York
San Francisco
Salt Lake City
Stafford
Bellaire
Sugarland
Houston
Constraint
Foreign Key- Employee (SSN) on Delete
Cascade
Check Sex in (M,F,m,f)
Data for Table - Works_On
ESSN
123456789
123456789
666884444
453453453
453453453
333445555
333445555
333445555
333445555
999887777
999887777
543216789
554433221
Pno
3388
1945
3388
77
22
77
6688
43
22
1
12
22
1945
Hours
32.5
7.5
40.0
20.0
20.0
10.0
10.0
35.0
28.5
11.5
13.0
17.0
21.5
Data for Table - Dependent
ESSN
333445555
333445555
333445555
987654321
123456789
123456789
Dependent_name
Alice
Theodore
Joy
Abner
Alice
Elizabeth
Sex
F
M
F
M
F
F
Bdate
05-Apr-76
25-Oct-73
03-May-48
29-Feb-32
31-Dec-78
05-may-57
Relationship
Daughter
Son
Spouse
Spouse
Daughter
Spouse
Execute the following Query on the Db to display and discuss the integrity constraints
violated by any of the following operations
1. Insert ('Robert', 'F', 'Scott', '943775543', '21-JUN-42', '2365 Newcastle Rd, Bellaire,
TX', M, 58000, '888665555', 1 ) into EMPLOYEE.
2. Insert ( '677678989', null, '40.0' ) into WORKS_ON.
3. Insert ( '453453453', 'John', M, '12-DEC-60', 'SPOUSE' ) into DEPENDENT
4. Delete the WORKS_ON tuples with ESSN= '333445555'.
5. Modify the MGRSSN and MGRSTARTDATE of the DEPARTMENT tuple
withDNUMBER=5 to '123456789' and '01-OCT-88', respectively.
Alter the tables to
1. Add Foreign Keys using Alter Table [if not done earlier].
2. Drop Foreign key defined on SuperSSN and add it using Alter table command.
3. Make name of Project as Unique and sex of employee as not null.
4. Make Address as a new type containing door no, street, city, State, Continent.
5. Make salary of employee to accept real values.
Exercise:2 (based on operators, constraints and
functions)
https://blog.51cto.com/u_15060458/3857077
1. Display the dept information from department table
2. Display the details of all employee
3. display the name and job for all employee
4. display name and salary for all employee
5. display employee number and total salary for each employee
6. display employee name and anual salary for all employee
7. display the names of all employee who are working in department number 10
8. display the names of all employee working as clerks and drawing a salary more than 3000
9. display employee number and names for employee who earns commission
10. display names of employee who do not earn any commission
11. display the names of employee who are working as clerk, salseman or analyyst and
drawimg a salary more than 3000
12. display the names of employee who are working in company for the past 5 years
13. display the list of employee who have joines the company before 30 june 90 or after 31
dec 90
14. display the names of employee working in department number 10 or 20 0r 40 or
employee working as clerks, salseman or analyst
15. display names of employee whose name starts with alphabet S
16. display names of employee whose name ends with alphabet S
17. display the names of employee whose names have second alphabet A in their names
18. display the names of employee whose name is exactly five charactere in length
19. display the total number of employee working in the company
20. display the total salary being paid to all employee
21. display the maximum salary from emp table
22. display minimum salary from emp table
23. display the average salary from emp table
24. display the maximum salary being paid to clerk
25. display the maximum salary being paid in dept no 20
26. display the min salary being paid to any salseman
27. display the average salary drawn by manager
28. display the names of employee in order of salary i.e the name of the employee earning
lowest salary should appear first
29. display the names of employees in descending order of salary
30. display the details from emp table in order of emp name
31. display empno ename deptno and sal. sort the output first based on name and within name
by deptno and within deptno by sal
32. display the name of the employee along with their annual salary (sal*12) the name of the
employee earning highest annual salary should appear first
33. display name, sal, hra, pf, da, total sal for each employee. the output shouldbe in the order
oftotal sal, hra 15% of sal,da 10% of sal, pf 5%of sal total salary will be (sal*hra*da)-pf
34. display dept number and total number of employees within each group
35. display the various jobs and total number of employee with each job group
36. display department number and total salary for each department
37. display department number and maximum salary for each depatrment
38. display the various jobs and total salary for each job
39. display each job along with minimum sal being paid in each job group
40. display the department numbers with more than three employee in each dept
41. display the various jobs along with total sal for each of the jobswhere total sal is greater
than 40000
41. display the various jobs along with total number of employee in each job. the
outputshould contain only those jobs with more than three employee
42. display the name of emp who earns highest sal
43. display the employee number and name of employee working as cleark and
earning highest salary among clerks
44. display the names of clearkwho earn salary more than that of james of that of sal
lesser than that of scott
45. display names of employees who earns a sal more than that of james or that of
salarygreater than that of scott
46. select ename, dname, job, empno, hiredate, loc from emp,
dept where emp.deptno = dept.deptno
order by ename
Exercise: 3
Group Functions
1. How many different departments are there in the ‘employee’ table
2. For each department display the minimum and maximum employee salaries
3. Print the average annual salary.
4. Count the number of employees over 30 age.
5. Print the Department name and average salary of each department.
6. Display the department name which contains more than 30 employees.
7. Calculate the average salary of employees by department and age
8. Count separately the number of employees in the finance and research department.
9. List out the employees based on their seniority.
10. List out the employees who works in ‘manufacture’ department group by first name