Overview: Consistent SQL practice across varied platforms builds real job-ready confidence.Guided lessons help beginners, while timed challenges sharpen intervi ...

After all of these years, SQL injection vulnerabilities still stand as an old reliable for attackers seeking to break into corporate databases. "SQL injection is still out there for one simple reason: ...

Here's a look at different ways to query Hadoop via SQL, some of which are part of the latest edition of MapR's Hadoop distribution SQL: old and busted. Hadoop: new hotness. That’s the conventional ...

I have taught several classes on the new features of SQL Server 2008, made a Web Seminar and written a Whitepaper on the subject. I have also attended the SQL PASS Summit in Seattle where there were ...

I had the recent good fortune to undertake a speaking tour in which I talked to eight chapters of the Professional Association for SQL Server (PASS) throughout the American Midwest and South. (You can ...

The next big version of the open source database has relatively few features aimed at the NoSQL market and instead focuses on major SQL-centric changes The next major release of the PostgreSQL open ...

I have a table that logs a record containing a userid, a fileid and a date, one record inserted every time that file is downloaded.<BR><BR>I want to get the top 10 downloads by count for a given date ...