如果数字是整数，MySQL 从小数部分删除零

Question

I have a sales table with price column as decimal(8, 2) and I'm running the query below to get the total price

select sum(case when status = 1 then price * quantity when status = 2 then price * quantity * -1 else 0 end) as total from sales;

It's working perfectly but my results are usually intergers so I end up with trailing zeros all the time. It'd be nice to just return the whole number if there is no decimal part

Answer 1

like akina said in his comment ...

you can cast the sum result to UNSIGNED INTEGER

select 
CAST(sum(case when status = 1 then price * quantity when status = 2 then price * quantity * -1 else 0 end) AS UNSIGNED)
 as total from sales;