Merges one record into another
record <- [attribute: value, ... ]
record <- [attribute: value, ... ] merges the anonymous record
[attribute: value, ... ] into the record bound to
record. Merge is useful for setting multiple attributes on a record at once.
Search for a record and merge another record into it.
search celia = [#Celia] bind celia <- [#student grade: 10, school: "East"]