DateDim View
Purpose
A "Date" dimension table typically provides a key that is a simplified string version of a date (e.g., "20180723") along with many different string descriptors of that date, making it easy to filter a Fact table based on different types of date and calendar representations (e.g., day, month, quarter). These tables do not typically take hour into account unless the desired analyses require time of day. Accordingly, the DateDim view does not include a calendar representation shorter than a single day. Part of the Core View Collection.
SQL Object Name
analytics.DateDim
Usage Notes
School Calendar concepts can be important for the overall analytics data model, but these properties are school-specific dimensions that do not belong in the Date view.
Data Source
The range of dates to include is generated from the edfi.CalendarDateCalendarEvent table, removing duplicates due to SchoolId being unnecessary. The example values below are based on July 19, 2018.
Structure
Name | Data Type | Description | Example |
|---|---|---|---|
| DateKey | string | Date without time component | 20180719 |
| Date | DateTime | Raw date at midnight | 2018-07-19 00:00:00.000 |
| Day | tinyint | Day number within a month | 19 |
| Month | tinyint | Numeric month number | 7 |
| MonthName | string | English name | July |
| CalendarQuarter | tinyint | Based on 1: Jan-Mar, 2: Apr-Jun, 3: Jul-Sep, 4: Oct-Dec | 3 |
| CalendarQuarterName | string | Ordinal name | Third |
CalendarYear | smallint | Full four digit year | 2018 |
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