The Stairway Series aren't meant for you to necessarily work through them all. They aren't designed as a course for all of SQL Server.

They are designed to get you up to speed in a particular area. So if you want to learn about T-SQL, we have two.

Stairway to T-SQL DML (Beginner)[/url]

Stairway to T-SQL: Beyond the Basics (Intermediate)[/url]

That doesn't necessarily come before or after the Stairway to SSIS, or Stairway to SSRS or Stairway to Data.

Choose the items in the areas that matter to you.