Queries can be programmatically built by passing predicate functions to chainable function calls. You can use a syntax familiar to ECMAScript5 Array built-ins and popular JavaScript libraries like lodash. Queries are parsed by the JavaScript runtime to be executed efficiently using Azure Cosmos DB’s indices. To learn more about this release, read the blog announcement: Azure Cosmos DB: JavaScript as Modern Day T-SQL. For more information about Azure Cosmos DB, visit the Azure Cosmos DB page.