MySQL - How can I always round up decimals?

Question

For instance I have the following value:

0.000018

This is 6 decimal places, but I want to round it up the nearest whole 4th decimal place, so th

Answer 1

There's another method, which is to add half a multiple of 10. For example: round(x+0.005, 2) where x is 0.923 = 0.93 which reduces the maximum floating point division error.