DataLens

DataLens is a business intelligence and data visualization system: it connects to databases, models the data into datasets, and renders charts and dashboards on top of them. It is offered as a managed service in Yandex Cloud, deployed on-premise, and run internally at Yandex.

This file orients and routes. It does not teach any one interface — pick the interface below and follow the skill that owns it.

Data flow

database → connection → source → dataset → chart → dashboard

• connection — credentials and driver for one database.
• source — a table or a SQL query exposed by that connection.
• dataset — the modelling layer: fields, calculated fields, joins, parameters, row-level security.
• chart — one visualization. Wizard charts sit on a dataset; QL charts skip the dataset and query a connection directly; editor charts are custom JavaScript.
• dashboard — tabs, widgets, selectors, and layout over charts.