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PL/SQL refers to a class as an "Abstract Data Type" (ADT) or "User Defined Type" (UDT), and defines it as an Oracle SQL data-type as opposed to a PL/SQL user-defined type, allowing its use in both the Oracle SQL Engine and the Oracle PL/SQL engine. The constructor and methods of an Abstract Data Type are written in PL/SQL.
Default date sorting does not work for spelled-out month–year or year–month combos and dates before the year 100, but it works in most other circumstances. For more information, see Help:Sortable tables § Date sorting problems .
Reserved words in SQL and related products In SQL:2023 [3] In IBM Db2 13 [4] In Mimer SQL 11.0 [5] In MySQL 8.0 [6] In Oracle Database 23c [7] In PostgreSQL 16 [1] In Microsoft SQL Server 2022 [2]
Fact_Sales is the fact table and there are three dimension tables Dim_Date, Dim_Store and Dim_Product. Each dimension table has a primary key on its Id column, relating to one of the columns (viewed as rows in the example schema) of the Fact_Sales table's three-column (compound) primary key (Date_Id, Store_Id, Product_Id).
This template returns the number of full years, surplus months, and surplus days between two specified dates. If the second set of parameters is not included, it will return the number of years, months and days between a specified date and today's date. Template parameters Parameter Description Type Status Year ('from' date) 1 year The year of the (first) date Number required Month ('from ...
While a simple SQL date-timestamp is useful for providing accurate information about the time a fact was recorded, it can not give information about holidays, fiscal periods, etc. An SQL date-timestamp can still be useful to store in the fact table, as it allows for precise calculations.
Template:Years or months ago displays the number of years (or months if less than 1 year) between a specified year/month date and the current year/month. It will also work correctly when only the year is given. Optionally, a second year/month date can be specified to be used instead of the current year/month.
This template returns the duration between two specified dates as a number of full years and remaining months. If the second set of parameters is not included, the duration is between the specified date and today's date.