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I saw a query run in a log file on an application. and it contained a query like:
SELECT ID FROM CUST_ATTR49 WHERE 1=0
what is the use of such a query that is bound to return nothing?
A query like this can be used to ping the database. The clause:
Ensures that non data is sent back, so no CPU charge, no Network traffic or other resource consumption.
A query like that can test for:
WHERE 1=0 OR <condition>)