I have fields A, B, C, D and need records with A,B,C,D closet to this vector MY = (2, 3, 4, 5). MY is different on every query.
Is there any Mongo (command line) function that I can turn a string into object? e.g. JSON.parse or something like that?
I just start learning about nosql database, specially MongoDB (no specific reason for mongodb). I browse few tutorial sites, but still cant figure out, how it handle relationship between two documents
I have val maxId = new ObjectId(...) and I want to query something like this: collection.find(\"_id\" $lte maxId). This is a compilation failure since ObjectId doesn\'t include the appropriate trait V
In my use case, I occasionally need to retrieve many 1000s of rows by ID and use a query of the form:
In doing some preliminary tests of MongoDB sharding, I hoped and expected that the time to execute queries that hit only a single chunk of data on one shard/machine would remain relatively constant as
Does MongoDB support something akin to ordinary database partitioning on a single machine?I’m looking for very fast queries (writes are less important) on a single large table on one machine.
Is $size equivalent operator for query condition in pymongo? like {\'a\'开发者_Python百科: {\'$size\': 3}}
I have a large csv file which contains over 30million rows.I need to load this file on a daily basis and identify which of the rows have changed.Unfortunately there is no unique key field but it\'s po
I\'m trying to run a FindAndModify operation in MongoDB, but I\'m getting an unusual exception var query = Query.EQ(\"_id\", wiki.ID);
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