{"id":8,"date":"2025-02-02T14:39:36","date_gmt":"2025-02-02T14:39:36","guid":{"rendered":"https:\/\/mrdataengineer.com\/?p=8"},"modified":"2026-01-07T21:01:24","modified_gmt":"2026-01-07T20:01:24","slug":"a-beginners-guide-to-graphql-part-1-2","status":"publish","type":"post","link":"https:\/\/mrdataengineer.com\/index.php\/2025\/02\/02\/a-beginners-guide-to-graphql-part-1-2\/","title":{"rendered":"A Beginner\u2019s Guide to GraphQL- Part 1"},"content":{"rendered":"\n

What Is GraphQL?<\/strong><\/h1>\n\n\n\n

GraphQL is a query language for APIs, paired with a server-side runtime that executes queries based on a type system you define. Released as open-source in 2015 by Facebook, it works with various programming languages and databases, offering flexibility for developers.<\/p>\n\n\n\n

Unlike REST APIs, which use multiple endpoints for different data, GraphQL uses a single endpoint<\/strong> (e.g., \/graphql) to handle all requests. This makes APIs more efficient and easier to use.<\/p>\n\n\n\n

How Does GraphQL Work?<\/strong><\/h1>\n\n\n\n

In a typical REST API, you might interact with endpoints like:<\/p>\n\n\n\n

    \n
  • GET \/books<\/code><\/strong> to fetch all books.<\/li>\n\n\n\n
  • GET \/books\/:id<\/code><\/strong> to fetch a single book by ID.<\/li>\n<\/ul>\n\n\n\n

    This approach has two common issues:<\/p>\n\n\n\n

      \n
    • Over-fetching<\/strong>: You get more data than needed (e.g., book title, author, genre, when you only want title and author). more data than you need.<\/li>\n\n\n\n
    • Under-fetching<\/strong>: You need multiple requests to gather related data.<\/li>\n<\/ul>\n\n\n\n

      GraphQL solves this by letting you request exactly the data you need in a single query.<\/p>\n\n\n\n

      Example:<\/p>\n\n\n\n

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