sql - how to get the unique records with min and max for each user -


i have following table:

id  gender  age highest weight  lowest weight   abc   f       30  90              70              1.3   f       30  90              65              null   f       30  null            null            1.3 b   m       40  100             86              2.5 b   m       40  null            80              2.5 c   f       50  105             95              6.4

i need result in sql server. need minimum of weight , maximum of weight , 1 record per user.

id  gender  age highest weight  lowest weight   abc   f       30  90              65              1.3 b   m       40  100             80              2.5 c   f       50  105             95              6.4

just grouping:

select id,         max(gender),         max(age),         max([highest weight]),         min([lowest weight]),         max(abc) sometable group id

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