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CIT201 DB Terms Ch 1
CIT201 DB Module 1 Terms
Term | Definition |
---|---|
database | Collection of data organized in a manner that allows for access, retrieval, and use of that data. |
database management system | Software that allows you to use a computer to create a database; add, change, and delete data in the db; ask and answer questions; and create forms and reports using the data. |
relational database | Database containing a collection of tables, each of which contains information on a specific subject, but are related. |
records | Rows in db table. Contain information on a given person, product, or event. |
fields | The columns in the table. Contains a specific piece of information within a record. |
unique identifier | Way of uniquely identifying each record in the db. Also called a primary key. |
autonumber field | Primary key created automatically by Access. Starts with 1, next 2, and so on. |
data type | Type of data that can be stored in the field. Examples: Short text, Number, etc. |
short text | Data type that can contain any characters up to 255 characters. |
number | Data type that can contain any positive or negative number and can be used in arithmetic calculations. |
currency | Data type can only contain monetary data and will appear with currency symbols. Can be used in arithmetic calculations. |
date and time | Data type can contain dates and/or times. |
long text | Data type can contain any characters over 255 characters. |
autonumber | Data type can store unique sequential number that Access assigns to record. Increments by 1. |
yes/no | Data type can store 1 of 2 values. Yes/No, On/Off, True/False |
OLE object | Data type can store OLE object which is object link to or embedded in the table. |
Hyperlink | Data type can store text that can be used as Hyperlink address. |
Attachment | Data type can contain an attached file. |
Calculated | Data type specifying a calculation based on other fields. Value is not actually stored. |
caption | Allows you to display caption instead of actual field name when creating a db table. |
Portrait orientation | printout will be across the width of the page |
Landscape orientation | printout will be across the height of the page |
import | Make a copy of the data as a table in the Access db. |
queries | Questions that can be answered using the data stored in a db. |
database properties | Details about a db that helps you organize and identify the db. Also known as metadata. Include such information as the author, title, or subject. |
Keywords | Words or phrases that further describe the db such as a class name or db topic |
Standard Properties | Associated with all Microsoft documents and include author, title, and subject. |
Automatically Updated Properties | Include file system properties and include the date you create or modify a file, the file size, etc. |
Recover | Process of returning a damaged db to a correct state. |
Backup Copy | Important to backup the db so you may recover if damaged. Makes a copy of the db. |
Live db | Database currently working on. |
Database Design | Process of determining the tables and fields that make up the db. |
Redundancy | Storing the same fact in more than one place. Try to avoid this while creating db tables. |