SQL Server : group by userId - merge 2 rows into 1 row

Question

When I query a user by UserName I get two rows but I would like to merge them into one row. For example,

Current result:

Desired result:

Answer 1

You can do aggregation :

select userid, username, 
       max(case when phonetype = 'primary' then phonenumber end) as primary_no,
       max(case when phonetype = 'secondary' then phonenumber end) as secondary_no
from t
group by userid, username;