Database terms Mr. Brunton.

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Presentation transcript:

Database terms Mr. Brunton

Database What is a database? Why do we use databases? A collection of information organized in such a way that a computer program can quickly select desired pieces of data. You can think of a database as an electronic filing system. Why do we use databases? Databases are used to store, organize, and retrieve large amounts of data, quickly. Therefore, databases can be used in any situation where data needs to be found quickly. Microsoft Access is a database editing software

Database examples Phone book Student records Employee records Driver’s License information, Health (Card) information) Bank account information ITunes / Music database Online stores (ie: Sears, E- Bay, Trader.ca, etc.) Sports / News (ie: NHL.com, TSN.ca)

Table a set of related data arranged in rows and columns

Field Relates to a column in a database table Contains all the information about one type of data (like names, address, etc.)

Field properties Properties, such as length, datatype, etc. that the database designer can set in order to control data

Datatypes Text, Memo, Number, Date/Time, Currency, AutoNumber, Yes/No, Lookup wizard

Text Datatype used to store any characters. Limited to 256 characters Ex: name, address

Memo Like the text datatype, memo is used to store any characters …. However it is unlimited in size. Ex: customer comments, comments on report cards

Number Datatype used to store values of numerical value Short integers, long integers, etc. have different value maximums … check field properties for more details Ex: age, population

Date / time Datatype used to store dates and times Can be shown in many different ways (full date, short date, times, etc.) Ex: date of birth

Currency Numerical datatype used to store money values Ex: amount owing

Autonumber Numerical value that is automatically created by Access Often used a unique identifier (primary key) Ex: student number, credit card number

Yes / no Datatype used to store a yes or no value Ex: paid in full?

Lookup A property under most datatypes that allows you create a list of values for a user to choose from Ex: salutation

Primary key Datatype property that requires each record in a table to be unique Used to ensure that no two records are the same Ex: social insurance number

Record Relates to a row in a database table Contains all of the data related to one person or item Ex: name, address, marks, etc about one student

Form Part of a database that allows a user to enter and edit data in a graphical interface

Query Asking the database question to find a certain set of data Ex: finding all students who are failing

Sort Ordering data in alphanumerical order

Report Creating a printable report of a database table or query

Datasheet view View for entering and editing data

Design view View that allows the database designer to edit field properties, query properties, etc.