使用 SQL 将字段值增加原始值的设定百分比

Question

How can i set balance to be balance + 2% (two percent of balance)

I have tried to do the following:

UPDATE users SET balance = balance + 2 '%';

but it didn't work.

Also tried this:

UPDATE users SET balance = balance + 2%;

It still didn't work.

Answer 1

Simply 2% represent 2 of 100%

-- 2% = balance * (2/100)
UPDATE users SET balance = balance + balance * (2/100);