What is Data warehouse
A database built for analysis rather than running an app. It answers big questions across all of a company's data.
In plain terms
A data warehouse holds cleaned, organized copies of a company's data so analysts can query all of it with SQL. Regular databases answer many small requests fast, and a warehouse scans billions of rows to answer one big question, like revenue by region by month. Snowflake, BigQuery, Redshift, and Databricks dominate the category.
What it tells you about a developer
Warehouse experience marks the analytics side of data work: modeling clean tables, writing heavy SQL, and serving dashboards and metrics. A developer who lives in the warehouse is often an analytics engineer, a distinct role from the data engineer who builds the pipelines feeding it. Titles blur the two constantly, so confirm which side the req actually needs.
Related
Read the lesson on Data warehouse More in Who does what on a team