db.MAIN_COLLECTION_NAME.aggregate([
{$match: {
"ANY_FIELD_0": "ANY_VALUE",
}},
{$lookup: {
from: "COLLECTION_NAME_TO_LOOKUP_FROM",
let: {
"FIELD_ALIAS_1": "$MAIN_COLLECTION_ANY_FIELD_1",
"FIELD_ALIAS_2": "$MAIN_COLLECTION_ANY_FIELD_2",
},
pipeline: [
{$match: {
$expr: {$eq: ["$ANY_FIELD_1", "$$FIELD_ALIAS_1"]},
$expr: {$eq: ["$ANY_FIELD_2", "$$FIELD_ALIAS_2"]},
}},
],
as: "LOOKUP_RESULTS_FIELD_ALIAS"
}},
]);