click below
click below
Normal Size Small Size show me how
Behind the Scenes
| Term | Definition |
|---|---|
| Database | collection of related data that can be easily stored, sorted, organized, and queried |
| Data Redundancy | duplicated data |
| Data Inconsistency | not possible to tell which data was correct easily |
| Data Centralization | ensures data integrity |
| Data Integrity | the data contained in the database is accurate and reliable |
| Database Administrator | an individual trained in the design and building of databases |
| Field | place where a database stores each category of information;p displayed in columns |
| Data Type | indicates what type of data can be stored in the field |
| Field Name | way of describing the field |
| Text Field | can hold any combination of alphanumeric data but is most often used to hold words |
| Numeric Field | stores numbers |
| Computational Field | a numeric field that stores the contents of a calculation |
| Date/Time Field | Holds data such as birthdays and due dates |
| Memo Field | Like a text field but can hold long pieces of text |
| Object Field | Holds items such as pictures, video clips, or documents |
| Hyperlink Field | stores hyperlinks to web pages |
| Table | a group of related records |
| Primary Key | Unique field that is used to keep records distinct |
| Record | a group of related fields |
| Relation | a table that contains related data |
| Object-oriented Database | stores data in object rather than in tables |
| Structured Data | analytical |
| Unstructured Data | nontraditional data such as audio clips |
| Binary Large Object | encoded in binary form |
| Query Language | a specially designed computer language that is used to manipulate data in or extract data from a database |
| Multidimensional Database | stores data in more than two dimensions |
| Database Management System | specially designed application software that interacts with the user, other applications, and the database to capture and analyze data. |
| Data Dictionary | Place where the description of the data is stored |
| Default Value | value the database uses for the field unless the user enters another value |
| Metadata | data that describes other data |
| Input Form | provides a view of the data fields to be filled |
| Validation | the process of ensuring that data entered into the database is correct and complete |
| Validation Rule | set up in the student database to alert the user if a clearly wrong entry is entered |
| Range Check | ensures that the data entered into the databases falls within a certain range of numbers |
| Field Constraint | a property that must be satisfied for an entry to be accepted into the field |
| Completeness Check | ensures that all fields defined as required have data entered into them |
| Consistency Check | compares the values of data in two or more fields to see if these values are reasonable |
| Browsing | Viewing records |
| Query | Question or inquiry |
| Relationship | a link between tables that defines how the data is related |
| Normalization | Reduce data redundancy by recording data only once |
| Foreign Key | the primary key of another table that is included for purposes of establishing relationships with one another |
| Referential Integrity | for each value in the foreign key of the table, there is a corresponding value in the primary key of the related table |
| Time-variant Data | doesn't all pertain to one period in time |
| Clickstream Data | captured information about each click that users make as they navigate through the site |
| Data Staging | extraction, transformation, and storage |
| Data Mart | small slices of the data warehouse |
| Information System | software-based solution used to gather and analyze information |