sql - Compare rows and calculate column of same row -


if see 2 abc's calculate total 9*2 = 18 , second row 15*2 = 30 

add fun1    fun2    fun3 9   abc     wxy     abc 15  def     abc     abc

a series of case expressions should trick:

select add * ((case fun1 when 'abc' 1 else 0 end) +                (case fun2 when 'abc' 1 else 0 end) +                (case fun3 when 'abc' 1 else 0 end)) total   mytable

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