Compared with SQL, however, HQL is fully object-oriented and understands notions like inheritance, polymorphism and association. With the exception of names of Java classes and properties, queries are case-insensitive. FOO is not org. Foo , and foo. This manual uses lowercase HQL keywords. Some users find queries with uppercase keywords more readable, but this convention is unsuitable for queries embedded in Java code.
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Learn about GraphQL, how it works, and how to use it in this series of articles. Looking for documentation on how to build a GraphQL service? There are libraries to help you implement GraphQL in many different languages. For an in-depth learning experience with practical tutorials, visit the How to GraphQL fullstack tutorial website.
GraphQL is a query language for your API, and a server-side runtime for executing queries by using a type system you define for your data. GraphQL isn't tied to any specific database or storage engine and is instead backed by your existing code and data.
A GraphQL service is created by defining types and fields on those types, then providing functions for each field on each type. For example, a GraphQL service that tells us who the logged in user is me as well as that user's name might look something like this:. A received query is first checked to ensure it only refers to the types and fields defined, then runs the provided functions to produce a result.
Learn more about GraphQL — the query language, type system, how the GraphQL service works, as well as best practices for using GraphQL in the articles written in this section; they help to solve common problems.
These are online courses outside the o7planning website that we introduced, which may include free or discounted courses. Hibernate Framework Tutorials. View more Tutorials: Hibernate Framework Tutorials. Hibernate is a library formed in order to work with all types of DB , it does not depend on any types of DB you choose". In the post, I use the simplehr , which is a simple database used in lots of tutorials on o7planning.
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