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This tutorial demonstrates some useful features built into Query view in Apache Druid. Query view lets you run Druid SQL queries and native (JSON-based) queries against ingested data. You can use ...

I've tried all kinds of combinations of selecting the top 10 with a count query but can't seem to get the 10 records to be anything but the last 10 inserted. <BR><BR>Not being a strong SQL guy ...

Query federation is a way to make use of distributed data sources on the Web, including many SPARQL endpoints as well as relational databases. SWObjects makes use of mapping rules represented as ...

Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement.