Answers for "do an substraction of 2 values of same row mysql"

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how to subtract of two numbers in mysql

select sum(s0.w - s1.w) as total_weight_loss
from (select idMember, max(weight) as w from Measurements m
      where m.date = (select min(date)  from Measurements n
                      where m.idMember = n.idMember)
      group by idMember) s0
join (select idMember, min(weight) as w from Measurements m
      where m.date = (select max(date)  from Measurements n
                      where m.idMember = n.idMember)
      group by idMember) s1
on s0.idMember = s1.idMember
Posted by: Guest on January-07-2021

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