2. Disclaimer: This presentation is prepared by trainees of
baabtra as a part of mentoring program. This is not official
document of baabtra –Mentoring Partner
Baabtra-Mentoring Partner is the mentoring division of baabte System Technologies Pvt .
Ltd

3. Week Target Achieved
1
2
3
Typing Speed

4. Jobs Applied
Week Company Designation Applied Date Current Status
1
2
3

5. Stored Procedures, Cursors and
Transactions
Muhammed Ajmal
mhdajmalik@gmail.com
www.facebook.com/userna
me
twitter.com/username
in.linkedin.com/in/profilena
me
1234567890

6. Overview
• Stored Procedure
• Structure of stored procedure
• Cursor
• Example-cursor
• Transaction
• Example-transaction

7. Stored Procedure
• A stored procedure is a set of SQL statements.
• Allow for variable declarations, flow control and
other useful programming techniques.
• stored in the server.

8. Stored Procedure contd..

9. Structure of storedprocedure
CREATE PROCEDURE proc_name
@parameter data type
AS
BEGIN
//defnition of the sp
END

10. Example for Stored Procedure
CREATE PROCEDURE test
AS
Begin
select course_description,department_name,SUM(fph_amount)
Amount,COUNT(distinct fk_student_id) 'no.of Student',teacher_name
from
tbl_course c join tbl_course_department cd on c.course_id=cd.fk_course_id
join tbl_department d on d.department_id=cd.fk_department_id
join tbl_student s on s.fk_dept_id=d.department_id
join tbl_fee_payment_history on s.pk_student_id=fk_student_id
left join tbl_teacher t on department_id=t.fk_dept_id
where teacher_head_id is null
group by
d.department_id,c.course_description,d.department_name,teacher_name
end

11. Stored Procedure contd..
• EXEC Or EXECUTE
• Example :
– EXECUTE test;

12. Advantage
• Improve performance
• Share logic
• Reusability
• Reduce network traffic

13. Cursor

14. Cursor
• Cursor is used to iterate through a set of rows
returned by a query and process each row.

15. Cursor contd..
DECLARE cursor_name CURSOR FOR SELECT_statement
OPEN cursor_name
FETCH next from cursor_name INTO variables list
CLOSE cursor_name;

16. Cursor contd..

17. Cursor Example

18. Cursor Example

19. Cursor Example
• declare @id int
• declare @total int
• declare cursor_grade Cursor for select pk_int_id,Total_mark from
tbl_student
• open cursor_grade
• fetch next from cursor_grade into @id,@total
• while(@@FETCH_STATUS=0)
• begin
• if(@total>=90)
• begin
• update tbl_student set grade='A+' where pk_int_id=@id
• end

20. Example contd..
• else if(@total>=80)
• begin
• update tbl_student set grade='A' where pk_int_id=@id
• end
• else if(@total>=70)
• begin
• update tbl_student set grade='B+' where pk_int_id=@id
• end
• else if(@total>=60)
• begin
• update tbl_student set grade='B' where pk_int_id=@id
• end

21. Example contd..
• else
• begin
• update tbl_student set grade='failed' where pk_int_id=@id
• end
• fetch next from cursor_grade into @id,@total
• end
• close cursor_grade

22. Example contd..

23. Transaction

24. Transaction
• A transaction is a logical unit of work that contains
one or more SQL statements
• Executes as a unit.

25. Transaction Control
BEGIN TRANSACTION
//logics…
If error
ROLLBACK TRANSACTION
Else
COMMIT TRANSACTION

26. Example Transaction
create stored procedure
@ac_no1 int,
@ac_no2 int
As
BEGIN
BEGIN try
BEGIN transaction;
select balance from Account where Account_Number=ac_no1;
select balance from Account where Account_Number=ac_no2;
update Account set balance=balance-900 here
Account_Number=ac_no1 ;

27. Example Transaction contd..
update Account set balance=balance+900
where Account_Number=ac_no2;
COMMIT TRANSACTION
END try
BEGIN CATCH
ROLLBACK TRANSACTION
END CATCH
END

28. ACID Property
• Atomicity
• Consistent
• Isolation
• Durability

29. Thank You

30. Questions??

31. If this presentation helped you, please visit our
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Thanks in advance.
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32. Contact Us
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Kerala, India.
Ph: + 91 – 495 40 25 550
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East Hill, Kozhikode
Kerala, India.
Ph: + 91 – 495 30 63 624
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NIT Campus, Kozhikode,
Kerala, India.

33. • Create a View to list out courses, department
name, Department Head ,the total fee
collected for that course and total number of
students studying for that course