io.ebean.annotation

Annotation Type Aggregation

@Retention(value=RUNTIME)
 @Target(value=FIELD)
public @interface Aggregation

Specify a property to be an aggregation formula.

The aggregation formula should be a sum, count, avg, min or max. By default aggregation properties are treated as transient and not included in a query. To populate the aggregation property it must be explicitly included in the select().

Example:

@Aggregation("count(details)")
Long totalCount;

@Aggregation("sum(details.quantity*details.unitPrice)")
Long totalAmount;

Example query

 List<TEventOne> list = Ebean.find(TEventOne.class)
      .select("name, totalCount, totalUnits, totalAmount")
      .where()
        .startsWith("logs.description", "a")
      .having()
        .ge("count", 1)
      .orderBy().asc("name")
      .findList();

Required Element Summary

Required Elements

Modifier and Type	Required Element and Description
String	value Aggregation formula using sum, count, avg, min, max.

Element Detail

value

public abstract String value

Aggregation formula using sum, count, avg, min, max.