Adding Digital Files to a Database

Digital files such as image and sound files can be inserted into a database.

Collect digital sound and image files of each of your friends in your Address database.

Open the table that contains the address details.

Go into design view.

Add two new fields called voice message and photo.

Set the data types for each to OLE Object.

Go back into form view.

In a cell under the new field simply right click and select insert object.

Select the Create from file option and then browse to the location of your sound or image file.

To view or listen to your files you will need to create a new form that contains the voice message and photo fields.

The photo field contains an image of the person and the sound field contains a sample of music. By following the step above i have been able to successfully add a photo and music into a form.

Bits and Bytes:

http://computer.howstuffworks.com/bytes.htm/printable

You will find there is a lot of information on the site. To help you identify what you need to know, search the site for the keywords  and questions listed below

Digit: Any of the numerals from 0 to 9, esp. when forming part of a number

Base 10: Well known decimal number system, represent any value with digit 0-9.

Where does the word bit originate from?

Comes from the word Binary digIT

Examine the tables beow:

Base10:

Place Value	10 000	1 000	100	10	1
Place Value	104	103	102	101	100
Digit	9	0	3	0	2
Digit Value	90 000	0	300	0	2

90 302 (base 10) = (9 x 10000) + (3 x 100) + (2 x 1)

If  6,357 can be written as;(6 * 1000) + (3 * 100) + (5 * 10) + (7 * 1) = 6000 + 300 + 50 + 7

How would you write 4,321(4 * 1000) + (3 * 100) + ( 2 * 10) + (1 * 1) = 4000 + 300 + 20 + 1

Examine the table below:

Base2

Place Value	16	8	4	2	1
Place Value	24	23	22	21	20
Digit	1	0	1	0	0
Digit Value	16	0	4	0	0

10100 (base 2) = (1 x 16) + (1 x 4) = 20 (base 10)

Write the following numbers in binary (base 2)

 21

10101= (1 x 16) + (1 x 4) + (1 x 1)

24
11100= (1 x 16) + (1 x8)

30
11110= (1 x 16) + (1 x 8) + (1 x 4) + (1 x 2)

What is a byte?

A group of binary digits or bits (usually eight) operated on as a unit

How many bytes in a kilo, mega, giga and tera bytes?

1 kilobyte = 1024 bytes

1 megabyte = 1 048 576 bytes

1 gigabyte = 1 073 741 824 bytes

1 terabyte = 1 099 511 627 776 bytes

Creating A Form:

This is an example of a form. A form is a record on the details of a person. Forms also make information easier to read and organise. 

Data Types

1.    Create a new database in Access. Call it “Data types”.

2.    Search for the phrase “field data types available in access” on Google. You should be able to obtain information on 9 data types used in access

3.    Create a record for each of the data types – you will need four fields, namely “Data Type”, “Typical Use”, “Size” and “Example”.

4.    Enter the data in the database.

5.    Post about the data types you have investigated.



Querying A Database

Yesterday we created queries for a database. We asked different queries to find out different information about the same products.

Query 1:
Product name of compaines in the USA

Results for Query 1:

Query 2:

Product name and Price over $20

Results for Query 2: 





Query 3:
Procduct name and the amoun of stock then have is over 30

Results for Query 3:



Creating a Database

Yesterday we made Databases in class about contacts.
This is a file made up of different contacts. There are 9 fields and 11 records.
Most of the data type is text except for DOB which uses time and date data and the photo which is abject data.

Database Definitions Part 2

2. A diagram showing what a file, record and field are. Using the example of a music database.

List as many commonly used databases as you can think of (at least five):
1. Address Book
2. Library Books
3. iTunes Library
4. Archives
5. School Attendance
6. School personal information