特别舍入

Question

如何将价格值四舍五入到所需的结果，当使用四舍五入时它会给我不同的结果而且上限也不同！

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等于或大于值

的整数

SELECT ceiling(879999.51357924604783137)

round(X,N) 四舍五入到 N 位：

N > 0：四舍五入到小数点右边N位。

N = 0：四舍五入到最接近的整数。

N < 0:四舍五入到小数点左边N位.

然后

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

特别舍入

Special Rounding

sql

rounding

floor

ceil