About COUNT

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Manual
20

CRUD Database Operations with JPA [2011-02-11]

objects in the database by using a simple query: Query q1 = em.createQuery("SELECT COUNT(p) FROM Point ... COUNT(p) FROM Point p") instructs JPA to count all the Point objects in the database. If you have used
Manual
20

CRUD Database Operations with JPA

objects in the database by using a simple query: Query q1 = em.createQuery("SELECT COUNT(p) FROM Point ... COUNT(p) FROM Point p") instructs JPA to count all the Point objects in the database. If you have used
Manual
11

Numbers in JPQL and Criteria Queries

Numeric values may appear in JPQL queries in many forms: as numeric literals - e.g. 123, -12.5. as parameters - when numeric values are assigned as arguments. as path expressions - in navigation to persistent numeric fields. as aggregate expressions - e.g. COUNT. as collection functions
Manual
11

FROM clause (JPQL / Criteria API)

_LENGTH, CHARACTER_LENGTH, CLASS, COALESCE, CONCAT, COUNT, CURRENT_DATE, CURRENT_TIME, CURRENT
Manual
11

JPA Criteria API Queries

, having, count, sum, avg, min, max, ...). ORDER BY clause (orderBy, Order, asc, desc). The links
Manual
11

ORDER BY clause (JPQL / Criteria API)

WHERE 'Europe' MEMBER OF c.continents GROUP BY c.currency HAVING COUNT(c) > 1 ORDER BY c.currency
FAQ
11

Is ObjectDB better than competing object databases?

queries (max, min, count, sum and avg). ObjectDB supports rich queries, including aggregate queries
Manual
11

JPA Query Structure (JPQL / Criteria)

GROUP BY / HAVING (groupBy, having, count, sum, avg, min, max, ...). Criteria ORDER BY (orderBy, Order, asc, desc).
Manual
11

Strings in JPQL and Criteria Queries

. LENGTH - Counting Characters in a String The LENGTH(str) function returns the number of characters in
Tutorial
11

Step 3: Add a Main Class [2011-02-11]

(); // Find the number of Point objects in the database: Query q1 = em.createQuery("SELECT COUNT(p