March 2015
Intermediate to advanced
284 pages
6h 13m
English
book
Hibernate Recipes: A Problem-Solution Approach, Second Edition
by Joseph Ottinger, Srinivas Guruzu, Gary Mak
Content preview from Hibernate Recipes: A Problem-Solution Approach, Second Edition
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CHAPTER 9
Querying with Criteria and Example
In the previous chapter, you saw how to use Hibernate Query Language (HQL) and Java Persistence Query Language (JPA QL). HQL forces you to interact with the database using SQL-like syntax. You must have some knowledge of SQL to create complex queries, which makes it difficult to develop applications that use multicriteria queries.
With HQL and JPA QL, it’s easy to make mistakes with string concatenation and SQL syntax.1 Sometimes, errors occur simply because there is no space between two clauses in SQL. Because these errors are uncovered only at runtime, if you don’t have decent unit tests, you must ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.