import Thumbnail from '@site/src/components/Thumbnail'; import VersionedLink from '@site/src/components/VersionedLink'; import Schema from '@site/static/icons/features/schema.svg';

<Schema /> GraphQL Schema

<div className="overview-header"> <div className="overview-text"> <p> Hasura's GraphQL Engine can be used to build a flexible and scalable GraphQL API on top of your existing Postgres, MySQL, Microsoft SQL Server, Athena, Snowflake, BigQuery, or Oracle database. </p> <p> The Hasura GraphQL Engine automatically generates a GraphQL schema based on the tables and views in your database.{' '} <b>You no longer need to write a GraphQL schema, endpoints, or resolvers</b>. </p> <p> The Hasura GraphQL Engine lets you do anything you would usually do with your database by giving you GraphQL over native constructs. </p> <h4>Quick Links</h4> <ul> <li> <VersionedLink to="/schema/quickstart"> Create tables on a connected data source in less than 30 seconds. </VersionedLink> </li> <li> <VersionedLink to="/getting-started/how-it-works/index">Learn more about how Hasura works.</VersionedLink> </li> </ul> </div> <iframe src="https://www.youtube.com/embed/zV7y7XTQZ3w" frameBorder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowFullScreen /> </div>

Understanding the GraphQL Schema

<div className="overview-gallery"> <VersionedLink to="/schema/postgres/postgres-guides/import-data-from-csv/"> <div className="card"> <h3>Import data from a CSV</h3> <p> Learn how to quickly and easily import data from a CSV file into a table in your Postgres database using psql. </p> </div> </VersionedLink> <VersionedLink to="/schema/postgres/custom-functions/"> <div className="card"> <h3>Extend your GraphQL schema with SQL functions</h3> <p> Learn how to extend your GraphQL schema with SQL functions. This is useful when you want to add custom business logic to your GraphQL API. </p> </div> </VersionedLink> <VersionedLink to="/schema/postgres/views/"> <div className="card"> <h3>Extend your GraphQL schema with Postgres views</h3> <p> Learn how to extend your GraphQL schema with Postgres views. This is allows you to view the results of a custom query as a virtual table. </p> </div> </VersionedLink> </div>