A practical guide to how databases work, covering schema design, SQL, indexing, transactions, concurrency, caching, pagination, and database selection.

Jeff's been involved in the IT industry since before the Internet and spent more than 20 years working in technical support, system administration, network administration, and consulting roles. He ...

Ontology-based query answering and data integration is a research field that combines formal knowledge representation with database technologies to enable unified access to heterogeneous, distributed ...

Dremio launched an updated version of its SQL query acceleration tool that enables customers to run queries significantly faster than unaccelerated queries. Reflections has been part of Dremio's ...

I’ve created a script that monitors a table in a SQL Server database. I’m only interested in one column in the table: TimeStamp. If the maximum (newest) value in TimeStamp is more than 30 minutes ...