Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Login
Remember
Register
Ask
Q&A
All Activity
Hot!
Unanswered
Tags
Users
Ask a Question
Ask a Question
Categories
All categories
Topic[话题] (13)
Life[生活] (4)
Technique[技术] (2.1m)
Idea[创意] (3)
Jobs[工作] (2)
Others[杂七杂八] (18)
Code Example[编程示例] (0)
Recent questions tagged Mongodb
0
votes
1.0k
views
1
answer
mongodb - Mongo field A greater than field B
i'm trying a simple query in Mongo which in MySQL would look like this. select * from emails where bounceCount ... the sentCount in that shell? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
1.1k
views
1
answer
mongodb - "group by" queries on meteor collection
My data mongoDB: >db.CUSTOMER.find() {"Name": "A", "CreatedDate": "Wed Jan 29 2014"} {"Name": "B", " ... I can do to make it works? Thank you See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
1.0k
views
1
answer
mongodb - Does Meteor have a distinct query for collections?
I'd like to return distinct fields in my collection. I know these are the docs for mongo operators, but I'm not ... "myField": 1 }); }); See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
1.5k
views
1
answer
mongodb - Easiest way to copy/clone a mongoose document instance?
My approach would be to get the document instance, and create a new one from the instance fields. I am sure there is a better way to do it. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
1.2k
views
1
answer
mongodb php - how to do "INNER JOIN"-like query
I'm using the Mongo PHP extension. My data looks like: users { "_id": "4ca30369fd0e910ecc000006", "login": "user11", ... u ON n.user_id = u.id See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
920
views
1
answer
mongodb - Docker: change folder where to store docker volumes
On my Ubuntu EC2 I host an application using docker containers. db data and upload data is being stored in ... this? Thank you in advance. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
1.5k
views
1
answer
mongodb - Sort nested array of objects
I'm looking for a way to sort a nested array of objects. Here's an example: { answers : [ { name : ' ... how can I sort them in ascending order? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
1.0k
views
1
answer
mongodb - Mongo Query question $gt,$lt
I have a query below. I want get items between 4 and 6 so only a:1 should match because it has the value ... }}); > No documents were returned. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
969
views
1
answer
mongodb find by comparing field values
Is it possible to express the following SQL query in mongodb: SELECT * FROM table AS t WHERE t.field1 > t. ... records even if we need only one See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
1.2k
views
1
answer
mongodb - How to save date properly?
I'm trying to save date (using C# official driver): val = DateTime.Parse(value).Date; //Here date is {11/11/ ... to save only the date I want? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
1.0k
views
1
answer
mongodb - How do you tell Mongo to sort a collection before limiting the results?
I want to select the most recent documents from a collection. The answer from this question mongodb: how to ... userLanguagePref: "Cantonese" } See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
1.2k
views
1
answer
mongodb - Mongo: count the number of word occurrences in a set of documents
I have a set of documents in Mongo. Say: [ { summary:"This is good" }, { summary:"This is bad" }, ... I understand it to some degree already :) See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
910
views
1
answer
mongodb - How do I check if an index is being used
I have a mongodb replica set with a lot of databases, collections & indexes. We did a lot of refactor and optimization and, ... ); } } } } } } See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
988
views
1
answer
mongodb - "VersionError: No matching document found" error on Node.js/Mongoose
I'm relatively new to Node.js and Mongo/Mongoose, and I'm having a very difficult time troubleshooting a specific ... .emit (events.js:96:17) See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
1.1k
views
1
answer
mongodb - How to aggregate by date when a full timestamp is given in aggregation framework?
I have a collection of errors, so that every error carries a date field. How can I aggregate/count/group ... smart projection should be applied. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
1.1k
views
1
answer
mongodb - Proper way to import json file to mongo
I've been trying to use mongo with some data imported, but I'm not able to use it properly with my ... object to obtain my desired result? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
976
views
1
answer
mongodb - File write operations in mongo script?
Is this possible to write the query result to the file from mongo js script. I have searched a lot, but I didn't find ... to file ????<br/> } See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
788
views
1
answer
mongodb - Hadoop Map/Reduce vs built-In Map/Reduce
What are the key differences to do map/reduce work on MongoDB using Hadoop map/reduce vs built-in map/reduce of ... on data stored in mongodb? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
1.2k
views
1
answer
mongodb - Printing Mongo query output to a file while in the mongo shell
2 days old with Mongo and I have a SQL background so bear with me. As with mysql, it is very convenient to be ... of a question I posted on SO See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
983
views
1
answer
mongodb - Mongo: find items that don't have a certain field
How to search for documents in a collection that are missing a certain field in MongoDB? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
911
views
1
answer
mongodb - Mongos Install/Setup in Elastic Beanstalk
Looking down the road at sharding, we would like to be able to have multiple mongos instances. The ... all the software installed. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
1.1k
views
1
answer
mongodb - Python dictionary : removing u' chars
How do I remove u chars from the following dictionary? {u'name': u'A', u'primary_key': 1} This data is coming ... name': 'A', 'primary_key': 1} See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
1.3k
views
1
answer
mongodb - Why getting error mongod dead but subsys locked and Insufficient free space for journal files on Linux?
I have installed mongo-10gen mongo-10gen-server on Linux CentOS server. I followed the steps from Link. I ... space for journals, terminating See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
1.5k
views
1
answer
mongodb - How can I save multiple documents concurrently in Mongoose/Node.js?
At the moment I use save to add a single document. Suppose I have an array of documents that I wish ... is done would be problematic. See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
1.2k
views
1
answer
mongodb - Redirect output of mongo query to a csv file
I am using MongoDB 2.2.2 for 32-bit Windows7 machine. I have a complex aggregation query in a .js file. I ... query. Thanks for any help :) See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
890
views
1
answer
mongodb - Calculate the count of nested objects with C#
I am developing a software using ASP.Net core 2.0 web api. I need to calculate count of some fields in my ... I write that query in mongoDB? See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
1.1k
views
1
answer
mongodb - Golang mgo getting empty objects
I'm trying to learn Go API development. I have a MongoDB instance running in a Docker container. I'm trying ... with robomongo if that helps. See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
0
votes
804
views
1
answer
mongodb - Sorting by maximum array field, ascending or descending
In my Meteor app, I have a collection of documents with an array of subdocuments that look like this: /* 1 */ ... API features are no good :( See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mongodb
Page:
« prev
1
...
3
4
5
6
7
8
9
10
11
12
13
...
26
next »
Ask a question:
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question
Just Browsing Browsing
[1] javascript - JS calling django function
[2] swagger - How to return an array of objects in SwaggerHub?
[3] sql - Select distinct the latest rows
[4] 微前端中前端路由和数据如何设计??
[5] 请问对象有什么遍历方法?
[6] c# - Transform Keras .h5 model to model usable by Emgu (OpenCV)
[7] #1064 - You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near
[8] ssl - NullPointerException at org.bouncycastle.crypto.signers.PSSSigner.generateSignature on Tomcat server. ERR_SSL_PROTOCOL_ERROR on chrome
[9] MySQL 针对 json 字段条件查询
[10] echarts重新setOption问题
2.1m
questions
2.1m
answers
60
comments
57.0k
users
Most popular tags
javascript
python
c#
java
How
android
c++
php
ios
html
sql
r
c
node.js
.net
iphone
asp.net
css
reactjs
jquery
ruby
What
Android
objective
mysql
linux
Is
git
Python
windows
Why
regex
angular
swift
amazon
excel
algorithm
macos
Java
visual
how
bash
Can
multithreading
PHP
Using
scala
angularjs
typescript
apache
spring
performance
postgresql
database
flutter
json
rust
arrays
C#
dart
vba
django
wpf
xml
vue.js
In
go
Get
google
jQuery
xcode
jsf
http
Google
mongodb
string
shell
oop
powershell
SQL
C++
security
assembly
docker
Javascript
Android:
Does
haskell
Convert
azure
debugging
delphi
vb.net
Spring
datetime
pandas
oracle
math
Django
联盟问答网站-Union QA website
Xstack问答社区
生活宝问答社区
OverStack问答社区
Ostack问答社区
在这了问答社区
在哪了问答社区
Xstack问答社区
无极谷问答社区
TouSu问答社区
SQlite问答社区
Qi-U问答社区
MLink问答社区
Jonic问答社区
Jike问答社区
16892问答社区
Vigges问答社区
55276问答社区
OGeek问答社区
深圳家问答社区
深圳家问答社区
深圳家问答社区
Vigges问答社区
Vigges问答社区
在这了问答社区
DevDocs API Documentations
Xstack问答社区
生活宝问答社区
OverStack问答社区
Ostack问答社区
在这了问答社区
在哪了问答社区
Xstack问答社区
无极谷问答社区
TouSu问答社区
SQlite问答社区
Qi-U问答社区
MLink问答社区
Jonic问答社区
Jike问答社区
16892问答社区
Vigges问答社区
55276问答社区
OGeek问答社区
深圳家问答社区
深圳家问答社区
深圳家问答社区
Vigges问答社区
Vigges问答社区
在这了问答社区
在这了问答社区
DevDocs API Documentations
Xstack问答社区
生活宝问答社区
OverStack问答社区
Ostack问答社区
在这了问答社区
在哪了问答社区
Xstack问答社区
无极谷问答社区
TouSu问答社区
SQlite问答社区
Qi-U问答社区
MLink问答社区
Jonic问答社区
Jike问答社区
16892问答社区
Vigges问答社区
55276问答社区
OGeek问答社区
深圳家问答社区
深圳家问答社区
深圳家问答社区
Vigges问答社区
Vigges问答社区
在这了问答社区
DevDocs API Documentations
广告位招租
...