7/21/2019 DBMS.pptx

1/27

7/21/2019 DBMS.pptx

2/27

Transaction Processing

Classification of DBMS

a) Single Userb) Multiuser

Multiprogramming: Allows the computer to execute multiple programs orprocesses at the same time, known as interleaving of processes.

Parallel Processing: if the System has multiple CPUs.

7/21/2019 DBMS.pptx

3/27

Transaction: It is a logical unit of database processing that includes one or more

database access operations- these can include insertion, deletion, modification orretrieval operations.

A single Transaction can contain more than one database operation. Transactionboundary is specified by begin transaction and end transaction.

To teach Transaction processing, a Database is basically represented as a collectionof named data items.

The size of data item is called its granularity.

Basic database operations

a) read_item(X)b) Write_item(x)

7/21/2019 DBMS.pptx

4/27

7/21/2019 DBMS.pptx

5/27

7/21/2019 DBMS.pptx

6/27

7/21/2019 DBMS.pptx

7/27

7/21/2019 DBMS.pptx

8/27

7/21/2019 DBMS.pptx

9/27

7/21/2019 DBMS.pptx

10/27

7/21/2019 DBMS.pptx

11/27

7/21/2019 DBMS.pptx

12/27

7/21/2019 DBMS.pptx

13/27

7/21/2019 DBMS.pptx

14/27

7/21/2019 DBMS.pptx

15/27

7/21/2019 DBMS.pptx

16/27

7/21/2019 DBMS.pptx

17/27

7/21/2019 DBMS.pptx

18/27

7/21/2019 DBMS.pptx

19/27

7/21/2019 DBMS.pptx

20/27

7/21/2019 DBMS.pptx

21/27

7/21/2019 DBMS.pptx

22/27

7/21/2019 DBMS.pptx

23/27

7/21/2019 DBMS.pptx

24/27

7/21/2019 DBMS.pptx

25/27

7/21/2019 DBMS.pptx

26/27

7/21/2019 DBMS.pptx

27/27