Template
single collection
multiple collections
mgodatagen
update
indexe
explain
Stage
Database
bson
mgodatagen
[{"key":1,AmbientTemp:12},{"key":2,AmbientTemp:10}]
Query
db.collection.update({},[{$addFields:{TrueAmbientTemp:{$add:[-8,{$multiply:["$AmbientTemp",47]}]}}}])
Result