# UDP Event store

The UDP Event store is a collection of Google BigQuery tables that store all behavioral data for all time. It is a major component of the [UDP Data lake](/products/data-and-analytics/unizin-data-platform/data-stores/data-lake.md).

<table data-view="cards"><thead><tr><th></th><th></th></tr></thead><tbody><tr><td><a href="/pages/WGQb5nMT4luEia09SrxV"><strong>Accessing the Event store</strong></a></td><td>Learn how to connect to your institution's UDP Event store, which is implemented in Google BigQuery.</td></tr><tr><td><a href="/pages/6YBRnIJ7bA8GxrqJoz0n"><strong>Expanded table</strong></a></td><td>The <code>expanded</code> table represents Caliper tables in a wide table of diverse columns and structures. By exploding JSON-source Caliper events into a wide tabular structure, the <code>expanded</code> table offers a performant, scalable method of accessing terabytes of event data at low-cost.</td></tr><tr><td><a href="#event-table"><strong>Event table</strong></a></td><td>The <code>events</code> table is a legacy BigQuery table that captures all event data for all time. Its schema provides complete, but basic, access to Caliper events captured by the UDP. This table has been deprecated and is no longer in use.</td></tr></tbody></table>


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