Using a Case statement IN where clause

Question

Problem: When category= books & FMCG then shipping_cost less then selling_price else no check.. Please suggest..:)

Actual Condition: WHERE a.shipping_cost < a.selling_price

Expected Condition: WHERE CASE WHEN a.category IN('Books','FMCG') then a.shipping_cost < a.selling_price END

Answer 1

You could put it like that i think :

WHERE (a.category IN('Books','FMCG') AND a.shipping_cost < a.selling_price) OR 
  (a.category NOT IN('Books','FMCG'))