sql server - two row to one row in sql -


i have table below. 

customer_number      note       loayltystatus    tier_code 123                  yes 123                  yes        1                  123                                               1

how combine 1 row 2 row above in select statement?

eg: 

customer_number      note       loayltystatus    tier_code     123                  yes    1                1 

select customer_number, max(note),max(loyaltystatus),max(tier_code) yourtable group customer_number

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