select decode(1,2,3,11,4,15,11,14,19,17) tt from dual; if 1=2 then 3 elsif 1=11 then 4 elsif 1=15 then 11 elsif 1=14 then 19 elsif 1=17 then 17 endif; select decode(1,2,3,11,4,15,11,14,19,1,2,4) tt from dual; if 1=2 then 3 elsif 1=11 then 4 elsif 1=15 then 11 elsif 1=14 then 19 elsif 1=1 then 2 endif;