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In order to create your query, you will need to define what information will be retrieved from the databases. Selected items from other i2b2 Web Client views can be dragged and dropped (copied) into the Query Tool view.  Below is a list of the various items that can be dragged and dropped in to the Query Tool as you create your query:

Concepts

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Concepts can be defined as terms, results, providers, etc. They can be added as a group (folder ()) or individually by dragging the item(s) from Navigate Terms, Find Terms, and Workplace views.

Modifiers

Modifiers are associated with a concept or group of concepts. They can be added as a group ( modifier folder) or individually by dragging the item(s) from Navigate Terms, Find Terms, and Workplace views.

Previous Query

A new query can be created from one that has already been run by dragging the previous query from Previous Query and Workplace views.

Patient Set

A patient set can be can be used in a query by dragging the patient set from Previous Query and Workplace views . When you run the query it will use the patient set to query against.

Encounter Set

An encounter set () can be used in a query by dragging the patient set from Previous Query and Workplace views. When you run the query it will use the encounter set to query against.

and Concept Folders

Modifiers and Modifier Folders

Previous Queries

Patients and Patient Sets

Encounter Sets

Operators

There are two operators, known as SQL Logical Operators, which are necessary when running a query that has more than one item. These operators provide a way to specify exactly what you want to retrieve. The operators are the 'AND' and 'OR' operators.

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