</blockquote>No it doesn't. Write a terribly long query that takes many seconds to run, and look at the estimated execution plan come to you almost instantaneously. It is the query optimizer doing its ...

In part 1 of my SQL Server 2022 features series, you learned about the improvements to the cardinality estimator component of query optimization. In this installment, you will learn about another ...

In SQL Server 2017, the query optimizer can now sense a bad join choice in a plan and dynamically switch to a better join algorithm during the execution of the code. This addresses some common ...

Query compilation and execution form the critical backbone of database systems, where high-level queries are translated into efficient low-level machine code and then executed to retrieve data.

“SQL on everything” is the tagline associated with Presto, the query engine that was initially developed by Facebook to rapidly analyze massive amounts of data — particularly data that lay scattered ...

As a consultant whose job description includes putting out performance fires, I get to see a lot of problematic queries that can dramatically harm overall server performance and throughput. Wondering ...