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 Enterprise JavaBean (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
Using EJB query
Concept topic    

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Last updated: Oct 20, 2010 11:50:58 PM CDT
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