Special Rounding

Question

How can I round price value to the desired results, when use round it gives me different results and also ceiling is different !

select ceiling(price)

 -------------------------------------------------------------------------
 | test following numbers as inputted price value | Is my desired Output |
 |             INPUT                              |   OUTPUT             |
 -------------------------------------------------------------------------
 |  879999.51357924604783137                      |  880000              |
 |  879999.50720242608036391                      |  880000              |
 |  879999.47819604919865821                      |  880000              |
 |  879999.49455676516329704                      |  880000              |
 |  880000.5                                      |  880000              |
 -------------------------------------------------------------------------

Answer 1

Ceiling returns the integer equal to or higher than the value

SELECT ceiling(879999.51357924604783137)

round(X,N) rounds to N digits:

N > 0: round to N digits to the right of the decimal point.

N = 0: round to the nearest integer.

N < 0 : round to N digits to the left of the decimal point .

then

 select cast(round(879999.51357924604783137,-1) as decimal(18,0))
 select cast(round( 880000.5,-1) as decimal(18,0))