Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Databases Querying Relational Databases Joining Table Data with SQL Inner Joins

Posted by Ankur Saxena
Ankur Saxena
681 Points

Which is better in terms of Query execution and performance metrics?

SELECT make.makename,model.modelname FROM make, model WHERE make.makeid = model.makeid AND make.Makename ='Chevy';

SELECT make.makename,model.modelname FROM make INNER JOIN model ON make.makeid =model.makeid WHERE make.makename = 'Chevy';

1 Answer

Steven Parker
Steven Parker
231,236 Points
Steven Parker
Steven Parker
231,236 Points

For most databases, this is most likely an alternate syntax that resolves to the same thing internally, so the efficiency would be the same.

Some database systems have built-in benchmarking tools you can use to compare efficiencies or execution costs and be sure.