Profiling Queries with SQL Explain Analyze

Using the query planner within SQL is the equivalent of using the debugger tools in browsers. By using explain with options for formatting and actually executing with analyze, we can see how our query performs.

Maybe we need to implement our query differently. Which includes possibly adding an index, using a sub-query instead of another table, or dozens of other options.

In the end, we need to first know how to profile our query and we do that with explain.

Video notes: https://explain.depesz.com