A specialized programming language used to retrieve and manipulate data from databases or other data sources. Like asking specific questions to find exactly the information you need.
SQL is the most common query language, letting you ask questions like 'show me all customers who ordered last month' from a database.
A query language (e.g., SQL) is a general concept, not a single cloud service. All major clouds support query languages through their database, data warehouse, and analytics services (for example, SQL in managed relational databases and data warehouses).