nosql

来源： https://stackoverflow.com/questions/63885700/select-from-tarantool-using-multiple-conditions

来源： https://stackoverflow.com/questions/63885700/select-from-tarantool-using-multiple-conditions

来源： https://stackoverflow.com/questions/26328891/push-value-to-array-if-key-does-not-exist-mongoose

来源： https://stackoverflow.com/questions/26328891/push-value-to-array-if-key-does-not-exist-mongoose

来源： https://stackoverflow.com/questions/63295972/not-able-to-to-delete-or-update-a-record-in-cassandra-3-11-2-using-cqlsh

来源： https://stackoverflow.com/questions/63295972/not-able-to-to-delete-or-update-a-record-in-cassandra-3-11-2-using-cqlsh

来源： https://stackoverflow.com/questions/63295972/not-able-to-to-delete-or-update-a-record-in-cassandra-3-11-2-using-cqlsh

来源： https://stackoverflow.com/questions/60712117/updating-multiple-documents-in-mongoose-at-once

问题 I am developing an app that will offer the possibility to filter the users you search (gender, age, location, ...). I want to make this fast and as cheaper as possible, so I have decided to store my data as a n-ary tree, just something like this: ----- Users ----- Root Node: Gender (male or female) -male --country (nodes: USA, UK, Spain, Germany, France, Italy, ...) ---age (nodes: 18, 19, 20, 21, 22, ..., 60) ->user (leaf nodes) -female --country (nodes: USA, UK, Spain, Germany, France, Italy

问题 I am developing an app that will offer the possibility to filter the users you search (gender, age, location, ...). I want to make this fast and as cheaper as possible, so I have decided to store my data as a n-ary tree, just something like this: ----- Users ----- Root Node: Gender (male or female) -male --country (nodes: USA, UK, Spain, Germany, France, Italy, ...) ---age (nodes: 18, 19, 20, 21, 22, ..., 60) ->user (leaf nodes) -female --country (nodes: USA, UK, Spain, Germany, France, Italy