Remove c
article thumbnail

Should You Use ClickHouse as a Main Operational Database?

Percona

2006-01-01 ? With the latest ClickHouse version, all of these features are available, but some of them may not perform fast enough. Currently, an issue has been opened to make the “tailing” based on the primary key much faster: slow order by primary key with small limit on big data. count()?? ? 2018-05-31 ?

article thumbnail

Data Mining Problems in Retail

Highly Scalable

The space of possible actions can be defined as a set of send/no-send decisions with regard to individual customers and the gross margin of the campaign depends both on actions (who will receive the incentive and who will not) and data such as expected revenue from a given customer and mailing costs. The model (2.1)

Retail 152