| Table | a relation that consists of a set of columns with a heading and a set of rows. |
| Time Variant Data | data whose accuracy is relevant to some one moment in time. |
| Top down methodology | Involves in building a datawarehouse first and then building datamarts.. |
| Transaction Processing | the activity of executing many short, fast running programs, providing the end user with consistent two or three second response time. |
| Transition Data | data possessing both primitive and derived characteristics; usually very sensitive to the running of the business. |
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