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Learn the basics of Qualys Query Language with this video series. You use Qualys Query Language (QQL) for building search queries to fetch information from Qualys databases. A database query is a string of search attributes (we call them 'search tokens' or simply 'tokens') structured in the compatible syntax, which returns the targeted values. In QQL, you pick the tokens from our token repository, use a query operator, and specify the expected token values. Our robust search mechanism helps you find the relevant information about various aspects of your IT infrastructure in the context of your Qualys subscription.