sql server - SQL select distinct by 2 or more columns -


i have table lot of columns , need write select take unique values. main problem need check 3 columns @ same time , if 3 columns have same values in columns(not between them, in own column) distinct. idea should distinct(column1 , column2 , column3)

any ideas? or need more information, because i'm not sure if gets have in mind.

this example. select should return 2 rows this, 1 last column have yes , other row withno`.

this example

this distinct keyword for:

select distinct col1, col2, col3   mytable

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