Alex Xu(@alexxubyte):Visualizing a SQL query in 5 mins SQL statements are executed by the database system in several steps, including: - Parsing the SQL statement and checking its validity - Transforming the SQL into an internal representation, such as relational algebra - Optimizing the internal representation and creating an execution plan that utilizes index information - Executing the plan and returning the results

Alex Xu

@alexxubyte

Co-Founder of ByteByteGo | Author of the bestselling book series: ‘System Design Interview’ | YouTube:

Joined July 2010

606 Following 293.7K Followers

Alex Xu@alexxubyte

2026.08.24 15:56

Visualizing a SQL query in 5 mins SQL statements are executed by the database system in several steps, including: - Parsing the SQL statement and checking its validity - Transforming the SQL into an internal representation, such as relational algebra - Optimizing the internal representation and creating an execution plan that utilizes index information - Executing the plan and returning the results