The Java Persistence Query Language (JP QL) is a specialized way of asking databases for information that combines regular database language with more advanced object-oriented programming ideas. Instead of having to write complex SQL queries, programmers can use JP QL to ask for data in a simpler, more flexible way. This language can be converted into SQL commands that work on many different database systems. JP QL makes it easier for developers to work with databases by using a language that's more like how they think about the program code itself.