1. Introduction

The MGRID QueryBuilder is a web-based tool for visual query building on healthcare databases. The QueryBuilder is used by researchers to select research data from existing healthcare databases, such as clinical datawarehouses, and export the data to a safe location for analysis.

Actual data delivery is controlled by an approval process that allows data stewards to either approve or deny each query before processing. If the source database contains personally identifiable data, the data can be de-identified before extraction. This de-identification can be either pre-configured for the source database, or be configured per query (subject to approval by a data steward).