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Basic predicates

 

A basic predicate compares two values. Basic predicates can be of two forms

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