sql - adding to column in case expression? -


i've tried find answer everywhere, can't seem figure out.

i'm trying add column of row when terms met, , have display results. like,

select itemname case demand when 'high' price + 2             when 'low' price - 1             else price itemtable

assuming data like:

item1 | high | 2

the output be:

item1 | 4

this in oracle sql developer, , i've tried using select statement inside of then, subquery seems little on top this.

you need comma separate 2 column definitions, , give name computed column;

select      itemname,         case demand          when 'high' price + 2         when 'low' price - 1         else price     end demand itemtable

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