Basic predicates

A basic predicate compares two values.

Basic predicates can be of two forms, for example:

expression-1 comparison-operator expression-2

expression-3 comparison-operator ( subselect )

The subselect must not return more than one value and the subselect cannot return a type of an EJB reference. Boolean types and reference types only support = and <> comparisons.

Example: Basic predicates

d.name='Java Development'
e.salary > 20000
e.salary > ( select avg(e.salary) from EmpBean e)

Related concepts

EJB query language

WHERE clause

Related tasks

Use EJB query