Chapter 6 Query Language Components : From Clause

From Clause
Just as a rule declaration specifies the scope of the rule, the from clause specifies the scope of the query. The items in the from clause must exist in the project ontology.
Continuous Queries
The from clause in a continuous query can specify window policies. See Overview of Continuous Queries and sections following, for more information.
Examples
The select and from clauses are required for all queries.
select * from /Concepts/Address as A
select * from /Concepts/Customer B
select * from /EntityA as A
select * from /EntityB B
select * from /EntityX, /EntityY, /EntityZ