Understanding SQL Query Execution - What Happens When You Run A SQL Command

Here is something school probably didn't teach you about SQL

Or at the very least you likely forgot.

When you write a query, hit submit, and then run the query or that little triangle in DBBeaver…

…what exactly happens?

Sure, you likely understand that data is pulled from multiple tables, data is filtered, and aggregations occur.

But behind the scenes, what is going on?


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About me:
I have spent my career focused on all forms of data. I have focused on developing algorithms to detect fraud, reduce patient readmission and redesign insurance provider policy to help reduce the overall cost of healthcare. I have also helped develop analytics for marketing and IT operations in order to optimize limited resources such as employees and budget. I privately consult on data science and engineering problems both solo as well as with a company called Acheron Analytics. I have experience both working hands-on with technical problems as well as helping leadership teams develop strategies to maximize their data.

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