nosql-aggregation Questions
3
Stages of MongoDB aggregation pipeline are always executed sequentially. Can the documents that the pipeline processes be changed between the stages? E.g. if stage1 matches some docs from collectio...
Goodell asked 18/1, 2023 at 0:1
3
How is aggregation achieved with dynamodb? Mongodb and couchbase have map reduce support.
Lets say we are building a tech blog where users can post articles. And say articles can be tagged.
user
...
Earleenearlene asked 24/5, 2017 at 6:3
1
Solved
I am new to MongoDB so I am not sure if I have phrased my question correctly.
I have a collection in which data looks like this:
{
"_id" : ObjectId("66666"),
"Id" : 994,
"PostType" : 1,
...
Curculio asked 6/10, 2018 at 0:13
5
Solved
I'm using mongo 2.2.3 and the java driver.
My dilemma, I have to $push a field and value into an array, but I cant seem to figure out how to do this. A sample of my data:
"_id" : 1,
"scores" : [
...
Eaglet asked 15/3, 2013 at 15:44
3
Solved
We are using Cassandra for OLTP DB, storing DB transactions, and evaluating requirements for reporting solution.
We are evaluating using Cassandra for reporting database with flattened schema.
...
Crat asked 8/1, 2018 at 19:1
4
Solved
I am trying to remodel a SQL database Cassandra such that, I can find the Cassandra equivalent for the SQL queries. I use CQL 3 and Cassandra v1.2. I modeled the db design in cassandra so that it s...
Amphibiotic asked 27/6, 2013 at 11:40
3
Solved
I'm struggling doing aggregations on a JSONB field in a PostgreSQL database. This is probably easier explained with an example so if create and populate a table called analysis with 2 columns (id a...
Korns asked 7/3, 2016 at 15:23
2
Solved
I need to aggregate (group-by) using 3 fields in ES.
Can I do that in 1 query or that I need to use a facet + iterate for each column?
Thank you
Wert asked 6/1, 2013 at 11:34
1
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