# MongoDB参考

- [运算符](https://docs.mongoing.com/can-kao/yun-suan-fu.md)
- [查询与映射运算符](https://docs.mongoing.com/can-kao/yun-suan-fu/query-and-projection-operators.md)
- [比较查询运算符](https://docs.mongoing.com/can-kao/yun-suan-fu/query-and-projection-operators/comparison-query-operators.md)
- [$eq](https://docs.mongoing.com/can-kao/yun-suan-fu/query-and-projection-operators/comparison-query-operators/eq.md)
- [$gt](https://docs.mongoing.com/can-kao/yun-suan-fu/query-and-projection-operators/comparison-query-operators/gt.md)
- [$gte](https://docs.mongoing.com/can-kao/yun-suan-fu/query-and-projection-operators/comparison-query-operators/gte.md)
- [$in](https://docs.mongoing.com/can-kao/yun-suan-fu/query-and-projection-operators/comparison-query-operators/in.md)
- [$lt](https://docs.mongoing.com/can-kao/yun-suan-fu/query-and-projection-operators/comparison-query-operators/lt.md)
- [$lte](https://docs.mongoing.com/can-kao/yun-suan-fu/query-and-projection-operators/comparison-query-operators/lte.md)
- [$ne](https://docs.mongoing.com/can-kao/yun-suan-fu/query-and-projection-operators/comparison-query-operators/ne.md)
- [$nin](https://docs.mongoing.com/can-kao/yun-suan-fu/query-and-projection-operators/comparison-query-operators/nin.md)
- [逻辑查询运算符](https://docs.mongoing.com/can-kao/yun-suan-fu/query-and-projection-operators/logical-query-operators.md)
- [$and](https://docs.mongoing.com/can-kao/yun-suan-fu/query-and-projection-operators/logical-query-operators/and.md)
- [$not](https://docs.mongoing.com/can-kao/yun-suan-fu/query-and-projection-operators/logical-query-operators/not.md)
- [$nor](https://docs.mongoing.com/can-kao/yun-suan-fu/query-and-projection-operators/logical-query-operators/nor.md)
- [$or](https://docs.mongoing.com/can-kao/yun-suan-fu/query-and-projection-operators/logical-query-operators/or.md)
- [元素查询运算符](https://docs.mongoing.com/can-kao/yun-suan-fu/query-and-projection-operators/element-query-operators.md)
- [评估查询运算符](https://docs.mongoing.com/can-kao/yun-suan-fu/query-and-projection-operators/evaluation-query-operators.md)
- [地理空间查询运算符](https://docs.mongoing.com/can-kao/yun-suan-fu/query-and-projection-operators/geospatial-query-operators.md)
- [数组查询运算符](https://docs.mongoing.com/can-kao/yun-suan-fu/query-and-projection-operators/array-query-operators.md)
- [按位查询运算符](https://docs.mongoing.com/can-kao/yun-suan-fu/query-and-projection-operators/bitwise-query-operators.md)
- [$comment](https://docs.mongoing.com/can-kao/yun-suan-fu/query-and-projection-operators/comment.md)
- [映射运算符](https://docs.mongoing.com/can-kao/yun-suan-fu/query-and-projection-operators/ying-she-yun-suan-fu.md)
- [更新运算符](https://docs.mongoing.com/can-kao/yun-suan-fu/update-operators.md)
- [字段更新运算符](https://docs.mongoing.com/can-kao/yun-suan-fu/update-operators/field-update-operators.md)
- [数组更新运算符](https://docs.mongoing.com/can-kao/yun-suan-fu/update-operators/array-update-operators.md)
- [按位更新运算符](https://docs.mongoing.com/can-kao/yun-suan-fu/update-operators/bitwise-update-operator.md)
- [聚合管道阶段](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-stages.md)
- [聚合管道操作符](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators.md)
- [$abs (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/abs-aggregation.md)
- [$acos (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/acos-aggregation.md)
- [$acosh (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/acosh-aggregation.md)
- [$add (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/add-aggregation.md)
- [$addToSet (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/addtoset-aggregation.md)
- [$allElementsTrue (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/allelementstrue-aggregation.md)
- [$and (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/and-aggregation.md)
- [$anyElementTrue (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/anyelementtrue-aggregation.md)
- [$arrayElemAt (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/arrayelemat-aggregation.md)
- [$arrayToObject (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/arraytoobject-aggregation.md)
- [$asin (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/asin-aggregation.md)
- [$asinh (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/asinh-aggregation.md)
- [$atan (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/atan-aggregation.md)
- [$atan2 (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/atan2-aggregation.md)
- [$atanh (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/atanh-aggregation.md)
- [$avg (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/avg-aggregation.md)
- [$ceil (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/ceil-aggregation.md)
- [$cmp (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/cmp-aggregation.md)
- [$concat (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/concat-aggregation.md)
- [$concatArrays (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/concatarrays-aggregation.md)
- [$cond (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/cond-aggregation.md)
- [$convert (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/convert-aggregation.md)
- [$cos (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/cos-aggregation.md)
- [$dateFromParts (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/datefromparts-aggregation.md)
- [$dateToParts (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/datetoparts-aggregation.md)
- [$dateFromString (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/datefromstring-aggregation.md)
- [$literal (aggregation)](https://docs.mongoing.com/can-kao/yun-suan-fu/aggregation-pipeline-operators/literal-aggregation.md)
- [查询修饰符](https://docs.mongoing.com/can-kao/yun-suan-fu/query-modifiers.md)
- [数据库命令](https://docs.mongoing.com/can-kao/shu-ju-ku-ming-ling.md)
- [聚合命令](https://docs.mongoing.com/can-kao/shu-ju-ku-ming-ling/ju-he-ming-ling.md)
- [地理空间命令](https://docs.mongoing.com/can-kao/shu-ju-ku-ming-ling/geospatial-commands.md)
- [查询和写操作命令](https://docs.mongoing.com/can-kao/shu-ju-ku-ming-ling/query-and-write-operation-commands.md)
- [查询计划缓存命令](https://docs.mongoing.com/can-kao/shu-ju-ku-ming-ling/query-plan-cache-commands.md)
- [认证命令](https://docs.mongoing.com/can-kao/shu-ju-ku-ming-ling/ren-zheng-ming-ling.md)
- [用户管理命令](https://docs.mongoing.com/can-kao/shu-ju-ku-ming-ling/user-management-commands.md)
- [角色管理命令](https://docs.mongoing.com/can-kao/shu-ju-ku-ming-ling/role-management-commands.md)
- [复制命令](https://docs.mongoing.com/can-kao/shu-ju-ku-ming-ling/replication-commands.md)
- [分片命令](https://docs.mongoing.com/can-kao/shu-ju-ku-ming-ling/sharding-commands.md)
- [会话命令](https://docs.mongoing.com/can-kao/shu-ju-ku-ming-ling/sessions-commands.md)
- [管理命令](https://docs.mongoing.com/can-kao/shu-ju-ku-ming-ling/guan-li-ming-ling.md)
- [诊断命令](https://docs.mongoing.com/can-kao/shu-ju-ku-ming-ling/zhen-duan-ming-ling.md)
- [免费监控命令](https://docs.mongoing.com/can-kao/shu-ju-ku-ming-ling/free-monitoring-commands.md)
- [系统事件审计命令](https://docs.mongoing.com/can-kao/shu-ju-ku-ming-ling/system-events-auditing-commands.md)
- [mongo Shell 方法](https://docs.mongoing.com/can-kao/mongo-shell-methods.md)
- [集合方法](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods.md)
- [db.collection.aggregate()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-aggregate.md)
- [db.collection.bulkWrite()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-bulkwrite.md)
- [db.collection.copyTo()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-copyto.md)
- [db.collection.count()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-count.md)
- [db.collection.countDocuments()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-countdocuments.md)
- [db.collection.estimatedDocumentCount()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-estimateddocumentcount.md)
- [db.collection.createIndex()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-createindex.md)
- [db.collection.createIndexes()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-createindexes.md)
- [db.collection.dataSize()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-datasize.md)
- [db.collection.deleteOne()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-deleteone.md)
- [db.collection.deleteMany()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-deletemany.md)
- [db.collection.distinct()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-distinct.md)
- [db.collection.drop()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-drop.md)
- [db.collection.dropIndex()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-dropindex.md)
- [db.collection.dropIndexes()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-dropindexes.md)
- [db.collection.ensureIndex()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-ensureindex.md)
- [db.collection.explain()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-explain.md)
- [db.collection.find()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-find.md)
- [db.collection.findAndModify()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-findandmodify.md)
- [db.collection.findOne()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-findone.md)
- [db.collection.findOneAndDelete()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-findoneanddelete.md)
- [db.collection.findOneAndReplace()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-findoneandreplace.md)
- [db.collection.findOneAndUpdate()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-findoneandupdate.md)
- [db.collection.getIndexes()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-getindexes.md)
- [db.collection.getShardDistribution()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-getsharddistribution.md)
- [db.collection.getShardVersion()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-getshardversion.md)
- [db.collection.insert()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-insert.md)
- [db.collection.insertOne()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-insertone.md)
- [db.collection.insertMany()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-insertmany.md)
- [db.collection.isCapped()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-iscapped.md)
- [db.collection.latencyStats()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-latencystats.md)
- [db.collection.mapReduce()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-mapreduce.md)
- [db.collection.reIndex()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-reindex.md)
- [db.collection.remove()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-remove.md)
- [db.collection.renameCollection()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-renamecollection.md)
- [db.collection.replaceOne()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-replaceone.md)
- [db.collection.save()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-save.md)
- [db.collection.stats()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-stats.md)
- [db.collection.storageSize()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-storagesize.md)
- [db.collection.totalIndexSize()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-totalindexsize.md)
- [db.collection.totalSize()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-totalsize.md)
- [db.collection.update()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-update.md)
- [db.collection.updateOne()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-updateone.md)
- [db.collection.updateMany()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-updatemany.md)
- [db.collection.watch()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-watch.md)
- [db.collection.validate()](https://docs.mongoing.com/can-kao/mongo-shell-methods/collection-methods/db-collection-validate.md)
- [MongoDB中的限制与阈值](https://docs.mongoing.com/can-kao/mongodb-limits-and-thresholds.md)
- [MongoDB系统集合](https://docs.mongoing.com/can-kao/sytem-collections.md)
- [词汇表](https://docs.mongoing.com/can-kao/glossary.md)
- [默认的MongoDB端口](https://docs.mongoing.com/can-kao/default-mongodb-port.md)
- [默认的MongoDB读/写关注](https://docs.mongoing.com/can-kao/default-mongodb-read-concerns-and-write-concerns.md)
- [服务器会话](https://docs.mongoing.com/can-kao/server-sessions.md)


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