Which performs first WHERE clause or JOIN clause

Question

Which clause performs first in a SELECT statement?

I have a doubt in select query on this basis.

consider the below example

Answer 1

You can refer MSDN

The rows selected by a query are filtered first by the FROM clause join conditions, then the WHERE clause search conditions, and then the HAVING clause search conditions. Inner joins can be specified in either the FROM or WHERE clause without affecting the final result.

You can also use the SET SHOWPLAN_ALL ON before executing your query to show the execution plan of your query so that you can measure the performance difference in the two.