mongodb_help

28> db.collections.help()
DBCollection help
        db.collections.find().help() - show DBCursor help
        db.collections.bulkWrite( operations, <optional params> ) - bulk execute
 write operations, optional parameters are: w, wtimeout, j
        db.collections.count( query = {}, <optional params> ) - count the number
 of documents that matches the query, optional parameters are: limit, skip, hint
, maxTimeMS
        db.collections.copyTo(newColl) - duplicates collection by copying all do
cuments to newColl; no indexes are copied.
        db.collections.convertToCapped(maxBytes) - calls {convertToCapped:'colle
ctions', size:maxBytes}} command
        db.collections.createIndex(keypattern[,options])
        db.collections.createIndexes([keypatterns], <options>)
        db.collections.dataSize()
        db.collections.deleteOne( filter, <optional params> ) - delete first mat
ching document, optional parameters are: w, wtimeout, j
        db.collections.deleteMany( filter, <optional params> ) - delete all matc
hing documents, optional parameters are: w, wtimeout, j
        db.collections.distinct( key, query, <optional params> ) - e.g. db.colle
ctions.distinct( 'x' ), optional parameters are: maxTimeMS
        db.collections.drop() drop the collection
        db.collections.dropIndex(index) - e.g. db.collections.dropIndex( "indexN
ame" ) or db.collections.dropIndex( { "indexKey" : 1 } )
        db.collections.dropIndexes()
        db.collections.ensureIndex(keypattern[,options]) - DEPRECATED, use creat
eIndex() instead
        db.collections.explain().help() - show explain help
        db.collections.reIndex()
        db.collections.find([query],[fields]) - query is an optional query filte
r. fields is optional set of fields to return.
                                                      e.g. db.collections.find(
{x:77} , {name:1, x:1} )
        db.collections.find(...).count()
        db.collections.find(...).limit(n)
        db.collections.find(...).skip(n)
        db.collections.find(...).sort(...)
        db.collections.findOne([query], [fields], [options], [readConcern])
        db.collections.findOneAndDelete( filter, <optional params> ) - delete fi
rst matching document, optional parameters are: projection, sort, maxTimeMS
        db.collections.findOneAndReplace( filter, replacement, <optional params>
 ) - replace first matching document, optional parameters are: projection, sort,
 maxTimeMS, upsert, returnNewDocument
        db.collections.findOneAndUpdate( filter, update, <optional params> ) - u
pdate first matching document, optional parameters are: projection, sort, maxTim
eMS, upsert, returnNewDocument
        db.collections.getDB() get DB object associated with collection
        db.collections.getPlanCache() get query plan cache associated with colle
ction
        db.collections.getIndexes()
        db.collections.group( { key : ..., initial: ..., reduce : ...[, cond: ..
.] } )
        db.collections.insert(obj)
        db.collections.insertOne( obj, <optional params> ) - insert a document,
optional parameters are: w, wtimeout, j
        db.collections.insertMany( [objects], <optional params> ) - insert multi
ple documents, optional parameters are: w, wtimeout, j
        db.collections.mapReduce( mapFunction , reduceFunction , <optional param
s> )
        db.collections.aggregate( [pipeline], <optional params> ) - performs an
aggregation on a collection; returns a cursor
        db.collections.remove(query)
        db.collections.replaceOne( filter, replacement, <optional params> ) - re
place the first matching document, optional parameters are: upsert, w, wtimeout,
 j
        db.collections.renameCollection( newName , <dropTarget> ) renames the co
llection.
        db.collections.runCommand( name , <options> ) runs a db command with the
 given name where the first param is the collection name
        db.collections.save(obj)
        db.collections.stats({scale: N, indexDetails: true/false, indexDetailsKe
y: <index key>, indexDetailsName: <index name>})
        db.collections.storageSize() - includes free space allocated to this col
lection
        db.collections.totalIndexSize() - size in bytes of all the indexes
        db.collections.totalSize() - storage allocated for all data and indexes
        db.collections.update( query, object[, upsert_bool, multi_bool] ) - inst
ead of two flags, you can pass an object with fields: upsert, multi
        db.collections.updateOne( filter, update, <optional params> ) - update t
he first matching document, optional parameters are: upsert, w, wtimeout, j
        db.collections.updateMany( filter, update, <optional params> ) - update
all matching documents, optional parameters are: upsert, w, wtimeout, j
        db.collections.validate( <full> ) - SLOW
        db.collections.getShardVersion() - only for use with sharding
        db.collections.getShardDistribution() - prints statistics about data dis
tribution in the cluster
        db.collections.getSplitKeysForChunks( <maxChunkSize> ) - calculates spli
t points over all chunks and returns splitter function
        db.collections.getWriteConcern() - returns the write concern used for an
y operations on this collection, inherited from server/db if set
        db.collections.setWriteConcern( <write concern doc> ) - sets the write c
oncern for writes to the collection
        db.collections.unsetWriteConcern( <write concern doc> ) - unsets the wri
te concern for writes to the collection
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