What is a Continual Query (CQ) ?

 
A continual query CQ is a standing query that can monitor updates at data sources and return new query results whenever the updates have reached a specified threshold(the trigger condition). A continual query consists of three key components: an SQL-like query, a trigger condition, and a stop condition
CQ Elements Examples
SQL-like query select COMPANYNAME, HIGH, LOW, VOLUME from stock
Trigger condition Time-based 6am every Monday
Content-based STOCK.HIGH INCBYP 20 WHERE
STOCK.COMPANYNAME = 'IBM'
Stop condition 23pm June 1, 1999
In order to run continual queries at the server, you MUST first go to "Registration" (make sure your email address is correct), then go to "Install CQ". But you may use "Normal Query" without registration. To view or remove your installed CQ, use "Browse CQ"
 

Why do you need to register?

Registering allows us to update you when the information you requested is relevant.  Currently we simply send you an email, but this will be expanded in the future to other forms of communication.
 

Other Resources

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