Early QBE, IBM's Query Management Facility (QMF)

Table 1. Find all sailors whose rating is equal to 10

Sailors	sid	sname	rating	age
P.			10

Table 2. Find sailors who have reserved a boat for 8/24/96 and who are older than 25

Sailors	sid	sname	rating	age		Reserves	sid	bid	day
	_Id	P._S		>25			_Id		'8/24/96'

Table 3. Find average age of sailors for each rating

Sailors	sid	sname	rating	age
			G.P.	_A	P.AVG._A