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JPA Query Structure (JPQL / Criteria)

The syntax of the Java Persistence Query Language (JPQL) is very similar to the syntax of SQL. Having an SQL-like syntax in JPA queries is an important advantage because SQL is a very powerful query language and many developers are already familiar with it. The main difference between SQL and JPQL

Privacy Policy

) for users in California. If you have any questions regarding this privacy policy or you would like

ObjectDB - Object Database for Java (JPA/JDO)

of experienced developers and easier learning curve. More complete solution that will more likely

Query Parameters in JPA

required for running queries and are likely to be less commonly used.

CRUD Database Operations with JPA

. If you have used SQL you should find the syntax very familiar. JPQL, the JPA query language, supports a SQL like

Eclipse Public License - v 1.0

may accept certain responsibilities with respect to end users, business partners and the like

Database Connection using JPA

another method for instantiation of EntityManager that, like the factory, takes a map of properties as

JPA Criteria API Queries

, quot, mod, abs, neg, sqrt). String expressions (like, length, locate, lower, upper, concat, substring

GROUP BY and HAVING clauses

for the GROUP BY clause is like the WHERE clause for the FROM clause. ObjectDB supports the HAVING

[ODB1] Chapter 8 - ObjectDB Server

, if you edit the default.xml file, it is likely that your modifications will be overwritten

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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