What are Hibernate queries and how do I use them?
Hibernate queries are used to retrieve data from a database using Hibernate ORM. You can use HQL (Hibernate Query Language) or Criteria API to create queries.
Can you give me an example of an HQL query?
Sure! An example of an HQL query is: FROM Employee WHERE salary > 50000
. This retrieves all employees with a salary greater than 50,000.
How does the Criteria API differ from HQL?
The Criteria API is a programmatic way to create queries using Java objects, while HQL is a string-based query language. The Criteria API is more type-safe and easier to build dynamically.
What are some common pitfalls when using Hibernate queries?
Common pitfalls include not managing sessions properly, using inefficient queries, and forgetting to close resources, which can lead to memory leaks.
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