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SQL performance tuning

SQL performance tuning can be an incredibly difficult task, particularly when working with large-scale data where even the most minor change can have a dramatic (positive or negative) impact on performance.

In mid-sized and large companies, most SQL performance tuning will be handled by a Database Administrator (DBA). But believe me, there are plenty of developers out there who have to perform DBA-like tasks. Further, in many of the companies I’ve seen that do have DBAs, they often struggle to work well with developers—the positions simply require different modes of problem solving, which can lead to disagreement among coworkers.When working with large-scale data, even the most minor change can have a dramatic impact on performance.

On top of that, corporate structure can also play a role. Say the DBA team is placed on the 10th floor with all of their databases, while the devs are on the 15th floor, or even in a different building under a completely separate reporting structure—it’s certainly hard to work together smoothly under these conditions.  In this article, I’d like to accomplish two things:

  1. Provide developers with some developer-side SQL performance tuning techniques.
  2. Explain how developers and DBAs can work together effectively.