Thank you for your answer...

But my issue is not resolved

Because of this sort must be based on the Id field

I used the following method

_{SET @SQLStr ='DECLARE @F3 bigint=0}

update viwe1 set @f3=f3=@f3+ (f1-f2),

f5 = case when @f3<0 then ''c''

when @f3>0 then "b" when @f3=0 then "a" end '+

@where

EXEC(@SQLStr);

But sometimes makes mistakes

It is right on the main table

But the mistaken view