Articles on aggregation

Finding Duplicate Documents in MongoDB

Finding Duplicate Documents in MongoDB

Need to find duplicate documents in your MongoDB database? This article will show you how to find duplicate documents in your…

Abdullah Alger
Abdullah Alger
Aggregations in MongoDB by Example

Aggregations in MongoDB by Example

In this second half of MongoDB by Example, we'll explore the MongoDB aggregation pipeline. The first half of this series cov…

John O'Connor
John O'Connor
Deeper into Postgres 9.5 - New Group By Options for Aggregation

Deeper into Postgres 9.5 - New Group By Options for Aggregation

If you use PostgreSQL, you'll know that its relational model and aggregate functions lend themselves easily to the creation o…

Lisa Smith
Lisa Smith