Overview: SQL remains a core skill for data management across industries in 2026Free courses build fundamentals while paid ...

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Shelley Doll finishes her coverage of SQL data types with an overview of datetime and interval data types. Learn more about the basic syntax of these standard SQL types. Datetimes and intervals are ...

Normalized data giving you problems? Learn how to use the SQL subselect statement and handle your database like a pro! Do you ever find yourself juggling queries to get the information you need?

So, my client and their subcontractor(s) have found themselves in a bit of a pickle, as no one bothered to spec or price a DB for a software implementation, so now I've been handed the bag. The client ...