How would I get all friends greater than the average age?
CREATE TABLE friends ( firstname CHAR(15), lastname CHAR(20), age INTEGER)
SELECT firstname, lastnameFROM friendsHAVING age >= AVG(age)ERROR: Attribute friends.firstname must be GROUPed or used
inanaggregate function
This fails too:
SELECT firstname, lastnameFROM friendsWHERE age >= AVG(age)ERROR: Aggregates not allowed in WHERE clause
This fails. I am stumped.
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