'Query Tool' is the main component through which users construct, refine, and submit i2b2 queries. Query construction is primarily based on drag-and-drop and selecting the appropriate options. This page describes the various operations and options of 'Query Tool' and how to use it in conjunction with other components. The Table of Content below offers links to quickly jump to relevant topics. In addition, a quick start video show the query process and to demonstrate the basic query-building features.

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