Lecture Slide - DBMS Intro

1. AJAYI, Olusola Olajide
CSC Dept., AAU Akungba
olusola.ajayi@aaua.edu.ng
08137044500 / 07056433798

2.  Chap 1: Database Concepts
 Definitions of common concepts
 Other concepts
 Database vsTraditional File System
 Intro to SQL

3.  Data/Data Item:
It is regarded as the smallest element
in a database system.
It is the smallest indivisible element or
component in a database system.

4.  Database:
This can be viewed as the collection of
related data.
It can also be said to be a repository
of data.
…base

5.  Database Management System:
This is a software that manages
database files.
It is a shared and integrated computer
structure that stores data.
Operational Data
…..inputs
Meta Data
…..query generated data
i.e. data about data
Output Data
…..outputs i.e.
Report etc.

6.  ROW: Is defined as a collection of data items belonging to an entity. It
represents RECORD of such an entity.
ID Matric Name Sex Reg.
No
Age
001 140404001 Ade Peters M 789 45
002 140404002 Anthony Joshua M 790 27
003 140404003 EkwesiliCecilia F 791 56
004 140404004 Aisha Buhari F 792 63
Record
belonging
to AJ!

7.  COLUMN: Is defined as a collection of data items belonging to
different entities. It represents FIELD in such entities.
ID Matric Name Sex Reg.
No
Age
001 140404001 Ade Peters M 789 45
002 140404002 Anthony Joshua M 790 27
003 140404003 EkwesiliCecilia F 791 56
004 140404004 Aisha Buhari F 792 63
Matric
FIELD
common to
all entities

8.  TABLE: Is defined as a collection of related RECORDS belonging to
entities in such a table/file.
ID Matric Name Sex Reg.
No
Age
001 140404001 Ade Peters M 789 45
002 140404002 Anthony Joshua M 790 27
003 140404003 EkwesiliCecilia F 791 56
004 140404004 Aisha Buhari F 792 63 TABLE

9.  DATABASE: Is defined as a collection of logically related
TABLES/FILES.
ID Matric Name Sex Reg.
No
Age
001 140404001 Ade Peters M 789 45
002 140404002 Anthony Joshua M 790 27
003 140404003 EkwesiliCecilia F 791 56
TABLE 1 /
FILE 1:
studfile
ID Matric Score Grade
001 140404001 67 B
002 140404002 54 C
003 140404003 89 A
TABLE 2 /
FILE 2:
csc212ex
…both stored
into one (1)
DATABASE

10.  …using MS-ACCESS
 So, put on your system NOW and LOAD your
MS-ACCESS package.

11.  TAKE HOME 1
 Database VS Traditional File System: Comment on the
‘Fight’
 Create a database named STAFFDB; in it have two
files: staffpro and staffacco. While staffprofile depicts
the bio-data (typical of a CV) of staff, staffacco stores
info about accomplishment of staff (e.g. laurels won
etc.).
 Create a database named STUDDB containing
studreg (registration data of all students in AAUA).

12.  TAKE HOME 2
 Consider a Customer and a Producer. Ponder
computationally and come up with the necessary
fields for both entities for the design of your tables.
Further work on these entities by populating each
with 20 records.
 From the Customer and Producer tables, fire queries
to detect : a. Customers and Producers residing in
Lagos; b. Producers that major in electronics;
c. Producers that have more than one branch.
 Generate Report for (a) Customers (b) Producers
(c) the meta data generated