From The Free On-line Dictionary of Computing (19 January 2023):
Query By Example
QBE
<database, language> (QBE) A user-friendly query language
developed by Moshé Zloof of IBM in 1975.
(http://informatik.uni-trier.de/~ley/db/indices/a-tree/z/Zloof:Mosh=eacute=_M=.html).
[Moshé M. Zloof, "Query By Example", AFIPS NCC 1975: 431-438].
[Moshé M. Zloof, "Query-by-Example: A Data Base Language", IBM
Systems Journal 16(4): 324-343, 1977].
["QBE/OBE: A Language for Office and Business Automation",
M.M. Zloof, Computer pp.13-22, May 1981].
(2001-03-25)