what should be the mongo query for this - node.js

Question

Below if a document from my collection of over 20,000,000 documents.
I need to find documents by a particular zip, out of these documents I need to select one record from each postal address (ADDR, CITY, STATE, ZIP, APT) and which has a age value of 18 or higher.
The results need to be limited to a number as well which is entered by the end-user.
{
"_id" : ObjectId("55e86e98f493590878bb45d7"),
"RecordID" : 84096380,
"FN" : "Michael",
"MI" : "",
"LN" : "Horn",
"NAME_PRE" : "MR",
"ADDR" : "160 Yankee Camp Rd",
"CITY" : "Telford",
"ST" : "TN",
"ZIP" : 37690,
"APT" : "",
"Z4" : 2200,
"DPC" : 605,
"CAR_RTE" : "R001",
"WALK_SEQ" : 228,
"LOT" : "0136A",
"FIPS_ST" : 47,
"FIPS_CTY" : 179,
"LATITUDE" : 36.292787,
"LONGITUDE" : -82.568171,
"ADDR_TYP" : 1,
"MSA" : 3660,
"CBSA" : 27740,
"ADDR_LINE" : 3,
"DMA_SUPPR" : "",
"GEO_MATCH" : 1,
"CENS_TRACT" : 61900,
"CENS_BLK_GRP" : 1,
"CENS_BLK" : 17,
"CENS_MED_HOME_VALUE" : 953,
"CENS_MED_HH_INCOME" : 304,
"CRA" : "",
"Z4_TYP" : "S",
"DSF_IND" : 1,
"DPD_IND" : "N",
"PHONE_FLAG" : "Y",
"PHONE" : NumberLong("4237730233"),
"TIME_ZN" : "E",
"GENDER" : "M",
"NEW_TO_BLD" : "",
"SOURCES" : 19,
"BASE_VER_DT" : 20101,
"COMP_ID" : NumberLong("3769001836"),
"IND_ID" : 1,
"INF_HH_RANK" : 1,
"HOME_OWNR_SRC" : "V",
"DOB_YR" : 1975,
"DOB_MON" : 7,
"DOB_DAY" : 10,
"EXACT_AGE" : 39,
"AGE" : 39,
"HH_INCOME" : "D"
}

Answer 1

if you are using mongoose, we can chain the operations by dot(.) operator. Since i see all your needs is conditional here is the example -
Person.
find({
ZIP: "37690",
ADDR : "",
STATE : "", //so on
AGE: { $gt: 18 }
}).
limit(10).
exec(callback);
more info - http://mongoosejs.com/docs/queries.html

Answer 2

You need to use aggregate operation.
var pipeline = [
{
$match: {ZIP: 37690, AGE: {$gt: 18}}
}, {
$group: {
_id: {ADDR: '$ADDR', CITY: '$CITY', STATE: '$STATE', ZIP: '$ZIP', APT: '$APT'},
PHONE: {$first: '$PHONE'}
}
},
{$limit: 10}
];
db.mycoll.aggregate(pipeline)
enhance the above to project whatever fields you require in results

Answer 3

I think This query will solve your problem.
Person.find({
ZIP: "37690",
AGE: { $gt: 18 }
}).
limit(50).
exec(callback);