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DATABASES

DATABASE TERMINOLOGY

TermDefinition
Database A collection of electronic records relating to a particular subject.
Database Object An object is something that can be designed, selected and manipulated. Tables, queries, forms and reports are all examples of objects.
Tables Consists of rows and columns of information
Entities An entity can be a single thing, person, place, or object.
Queries Extracts and analyses data from a database table or several tables.
Forms Data entry into a table is usually done through a form
Reports This is a printable output based on tables and queries or multiple queries.
Autonumber A data type that generates a unique sequence of numbers.
Data Types Each field in a table must be assigned a data type specific to the content of the data being entered.
Text A data type that stores a combination of alphabetic characters and numbers.
Memo Stores lengthy text up to 65,335 characters
Number A data type that is used to store numbers and perform calculations.
Date/Time A data type that is used to store dates and times in different format types.
Currency A data type that is used to store monetary values.
Yes/No A data type for customised formats such as Yes or No and True or False.
Field Size Length and amount of characters that can be entered into a field.
Format Specifies the format of which numbers, text and dates/times are displayed.
Caption Property used to set a name for a field as visible in the Datasheet view.
Default Value Property used to specify a value that is automatically displayed in the field when you add a record to a table.
Index Arranges records sequentially in ascending or descending order. It helps you sort the records on a selected field and facilitates subsequent searches for particular data in the table, therefore allowing faster data access
Relationships Reduces duplicated data. This type of database uses multiple tables, containing related data. It works by matching a unique field in one table with a field in another table.
One-to-one This type of relationship is not so common because most information related in this way would be in one table. An example would be one person would have one passport.
One-to-many This type of relationship is used in relational databases. It links tables together. An example would be patient has many appointments.
Validation Rule Provides an automatic check that any input data is valid.
Validation Text The message that will be displayed if a user attempts to input data which is outside the set limits
Sorting Allows you to order the data alphabetically or numerically in ascending or descending order.
Filtering Allows you to find specific records and filter specific information.
Operator Criteria used in queries such as less than, equal to, not equal to, greater than.
Wizard Used to create queries, forms and reports but is limited to the appearance of the output.
Primary Key This is used on fields which contain unique identifiers such as Autonumber fields and allows tables to be related.
Foreign Key This is used when linking tables as the Primary Key in one table becomes the Foreign key in the linked table.
Created by: donnaowen