Download Data manipulation intro 1

ICT for IGCSE – Syllabus Cambridge IGCSE ®
Information and Communication Technology
0417
Key concepts:
Creating a database structure
Manipulating data
Presenting data
Table
Repeat and remember
Field name
Fields
Record
Files, field name, fields and record
(Type of files, headline, column, row)
City
Inhabitants
Downtown
Visitors
Tokyo
35 000 000
17 000 000
2 400 000
Seoul
30 000 000
12 000 000
1 100 000
Delhi
28 000 000
14 000 000
750 000
Shanghai
24 000 000
17 000 000
4 500 000
Yantai
7 000 000
2 200 000
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Queries:
A query is used to extract specific
information from a database.
Like a question that gives you the correct answers
Alphanumeric/text
Letters and numbers that you don’t use in calculations
Numeric
Used for true numbers, not like phone-numbers
Decimal, Integer and percentage
Currency
Currency symbol attached
Date/time
Different timeformats to choose from
Logical/Boolean
Can only have two values (Yes/No, 0/1)