Using the W3C OWL ontology standard lets you get more out of all kinds of data. Find out how this standard and some free software lets you query two databases as if they were one. by Bob DuCharme
What would a birthday party be without presents? Good thing PostgreSQL didn't have to find out. The open source database project celebrated its 10th year this weekend at its Anniversary Summit event held in Toronto.
Interactive tutorial cover SQL in various dialects including SQL Server, Oracle, DB2, MySQL and Postgres
The tutorial uses three tables (download as text or MsSql-Script) to explain subqueries in joins and GroupBy. Differences between Access- and Ansi-Update are discussed, a freeware-tool allows to execute Queries directly.
Database design, development and administration discussions
Interactive/On-line SQL Tutorial with SQL Interpreter and Live Database
SQL Server News and Information Source
DBMan is a full featured database manager that provides a web interface to add/remove/modify/view records in a flatfile ascii database.