Availability::- use_module(library(bdb)).(can be autoloaded)
[nondet]bdb_del(+DB,
?Key, ?Value)Delete the first matching key-value pair from the database. If the
database allows for duplicates, this predicate is non-deterministic,
otherwise it is semidet. The enumeration performed by this
predicate is the same as for bdb_get/3.
See also bdb_delall/3.