Do it like this example:
try to run this
set @fulfillStatus = 1;
select
CASE
when @fulfillStatus = 0 then 'open'
when @fulfillStatus = 1 then 'processing'
when @fulfillStatus = 2 then 'complete'
when @fulfillStatus = 5 then 'Shipped'
when @fulfillStatus = 9 then 'void'
else "None"
END as "Order Status"
3
solved MySql case statement error