Is there a faster way to write those 3 same queries?

Is there any faster query way of rewriting these queries or by combining them?

update products
set shop = '1' 
where shop LIKE '%demo%'

update products
set shop = '2' 
where shop LIKE '%car%'

update products
set shop = '3' 
where shop LIKE '%a开发者_如何学Crt%'

update products
set shop =
case 
when shop like '%demo%' then 1
when shop like '%car%' then 2
when shop like '%art%' then 3
else shop
end

Maybe a stored procedure: http://www.sqlinfo.net/mysql/mysql_stored_procedure_UPDATE.php