mongodb filter field

相關問題 & 資訊整理

mongodb filter field

MongoDB Manual - How to query an array: query on the array field as a whole, ... value, use the filter <field>: <value> } where <value> is the element value. ,If the field holds an array, then the $in operator selects the documents whose field holds an array that contains at least one element that matches a value in the ... ,[1], Starting in MongoDB 4.2, users can no longer use the query filter $type: 0 as a synonym for $exists:false . To query for null or missing fields, see Query for ... ,The item : null } query matches documents that either contain the item field ... [1], Starting in MongoDB 4.2, users can no longer use the query filter $type: 0 as a ... ,[1], Starting in MongoDB 4.2, users can no longer use the query filter $type: 0 as a synonym for $exists:false . To query for null or missing fields, see Query for ... ,Specifies the fields to return in the documents that match the query filter. ... The find() method always returns the _id field unless you specify _id: 0 to suppress ... ,$filter has the following syntax: ... Field, Specification ... The following example filters the items array to only include documents that have a price greater than or ... ,Project Fields to Return from Query¶. This page provides examples in: Mongo Shell; Compass; Python; Java (Sync); Node.js; PHP; Motor; Java (Async); C#; Perl ... ,Set Query Filter¶. In the Filter field, enter a filter document. You can use all of the MongoDB query operators except the $ ... ,Query/select by embedded documents/nested fields/subdocuments. ... condition on a field that is an embedded/nested document, use the query filter document ...

相關軟體 MongoDB 資訊

MongoDB
MongoDB 是一個免費且開放源碼的跨平檯面向文檔的數據庫程序。分類為 NoSQL 數據庫程序,MongoDB 使用類似 JSON 的文檔與模式。它為使用 MongoDB 包括數據庫開發人員和 DBA 的任何人提供了豐富的 GUI 工具。主要功能包括:全功能嵌入 MongoDB Shell,用戶友好的 Map-Reduce 操作編輯器,創建 / 刪除數據庫,管理集合及其索引的能力,用戶友好的 G... MongoDB 軟體介紹

mongodb filter field 相關參考資料
Query an Array — MongoDB Manual

MongoDB Manual - How to query an array: query on the array field as a whole, ... value, use the filter &lt;field&gt;: &lt;value&gt; } where &lt;value&gt; is the element value.

https://docs.mongodb.com

$in — MongoDB Manual

If the field holds an array, then the $in operator selects the documents whose field holds an array that contains at least one element that matches a value in the&nbsp;...

https://docs.mongodb.com

$exists — MongoDB Manual - MongoDB Documentation

[1], Starting in MongoDB 4.2, users can no longer use the query filter $type: 0 as a synonym for $exists:false . To query for null or missing fields, see Query for&nbsp;...

https://docs.mongodb.com

Query for Null or Missing Fields — MongoDB Manual

The item : null } query matches documents that either contain the item field ... [1], Starting in MongoDB 4.2, users can no longer use the query filter $type: 0 as a&nbsp;...

https://docs.mongodb.com

$type — MongoDB Manual

[1], Starting in MongoDB 4.2, users can no longer use the query filter $type: 0 as a synonym for $exists:false . To query for null or missing fields, see Query for&nbsp;...

https://docs.mongodb.com

MongoDB db.collection.find() - MongoDB Documentation

Specifies the fields to return in the documents that match the query filter. ... The find() method always returns the _id field unless you specify _id: 0 to suppress&nbsp;...

https://docs.mongodb.com

$filter (aggregation) — MongoDB Manual

$filter has the following syntax: ... Field, Specification ... The following example filters the items array to only include documents that have a price greater than or&nbsp;...

https://docs.mongodb.com

Project Fields to Return from Query — MongoDB Manual

Project Fields to Return from Query¶. This page provides examples in: Mongo Shell; Compass; Python; Java (Sync); Node.js; PHP; Motor; Java (Async); C#; Perl&nbsp;...

https://docs.mongodb.com

Query Your Data — MongoDB Compass stable

Set Query Filter¶. In the Filter field, enter a filter document. You can use all of the MongoDB query operators except the $&nbsp;...

https://docs.mongodb.com

Query on EmbeddedNested Documents — MongoDB Manual

Query/select by embedded documents/nested fields/subdocuments. ... condition on a field that is an embedded/nested document, use the query filter document&nbsp;...

https://docs.mongodb.com