The structured query language is a powerful tool for connecting ... You can also deploy a simple backend as the HTML to SQL connection that communicates with the front-end code that actually ...

A common SQL habit is to use SELECT * on a query, because it’s tedious to list all the columns you need. Plus, sometimes those columns may change over time, so why not just do things the easy way?

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 ...

Maybe the query runs well on a local set of test data but fails miserably on the production system. I don’t expect SQL developers to become administrators, but they must take production issues ...

Whether it’s parsing XML content, building HTML for the browser or trying to understand what ... especially when user data is involved. Such is the case with SQL queries. They seem so innocent, and so ...

The free course takes you from the basics of creating database tables and selecting data to more advanced SQL queries and tasks, like joining multiple tables together and modifying databases.