The Data module lets you use database tables that are foreign to Drupal.
You can 'adopt' a table in your database that ordinarily Drupal would not be aware of. This might be external data you have imported, or a table that another application has created. You can modify this table's schema in Data's UI, and you can also create custom tables in the Data UI.
A table that Data is aware of can be shown in Views. It can also be declared as the base table for a custom Entity type. This allows Field API fields to be added, and relationships to be created to other entities with Entity Reference fields.
In addition to creating tables in your Drupal database, the Data module can provide access to existing, non-Drupal tables by "adopting" the
This page covers how to use Views and Date module with fields in your Data table which contain date-related data.
Needs review/summary update, but the main information is in this rather old support request: [#580650]
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