Planning a database

 POINTSTO BE NOTEDWHILE PLANNING A
DATABASE.
 VIEWING AND REPORTINGTHE DATA.

IDENTIFY THE BPURPOSE OF YOUR
DATABASE
 WHAT SORT OF DATATO BE STORED,
 WHAT OUTPUTSARE EXPECTED FROM IT.
 AND HOWTHE DATA SHALL BE
PROCESSED.

EXAMPLES
 AIM 1:TO MAINTAIN RECORDS OF ALL
INDIVIDUALS CONNECTEDTOTHE
SCHOOLS.
 AIM 2:TO LOCATEAND GENERATE
REPORTS OF ANY INDIVIDUAL INTHE
SCHOOL.
 EG: MARKLIST, PROGRESS REPORT.

Table 1: students
 Input
1) GR. NO:
2) NAME:
3) ROLL NO:
4) CLASS:
5) DOB
6) HOUSE
 Output
1) CLASS LIST
2) NO OF STUDENTS IN
EACH CLASS
3) NO OF STUDENTS
BELONGSTO
CATHOLIC RELIGION.
4) NO OF
STUDENTSBELONGTO
PERTICULAR AREA.

TABLE 2: TEACHERS
 INPUT
1) TEACHER CODE
2) NAME
3) QUALIFICATION
4) DESIGNATION
5) DATE OF JOINING
 OUTPUT
1) TEACHER’S DETAILS
2) PERFORMANCE
REPORT

TABLE 3: OTHERS
 INPUT
1) STAFF CODE
2) NAME
3) QUALIFICATION
4) DESIGNATION
5) DATE OF JOINING
 OUTPUT
1) STAFF DETAILS
2) STAFF REPORT

ALL INPUTS SHALL BE REFERED AS
FIELDS
 Assign meaningful and
short names to the
field.
 Not allowed:
 .
 !
 []
 .
 Non printable
characters.
 Examples:
 Tel_no
 Roll_no

DATA TYPES
 Text
 Memo
 Number
 Date/time
 Currency
 Auto number
 Yes/no
 Hyperlink
 OLE object

THE PRIMARY KEY
 Every table has a
primary key.
 Its uniquely identify
each record in table.
 No same value is
allowed in every field.
 It should be a unique
value for each record.

DATA VALIDATION
 There is a
possibility of
error while
entering the data
values.
 Data validation
checks the data
that is entered in
the table to
prevent any data
entry errors.

APPLYING PRIMARY KEY TO
ROLL_NO FIELD

SAVE THE TABLE
 SAVETHE
TABLE.
 CLOSE
THE
DESIGN
VIEW.

ENTER THE VALUES SAVE AND
CLOSE

Planning a database

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