四舍五入从Teradata SQL助手提取的值时出现问题

Question

I need to round off couple of fields that I extract from Teradata SQL assistant. Currently I am using CAST(Field1 as numeric(20,2)) as Field1 18.529 is rounded to 18.53 but 36.425 is rounded to 36.42 instead I am expecting 36.43 How can this be achieved?

Answer 1

The rounding rules for CASTs depend on a global setting, RoundHalfwayMagUp in dbscontrol.

You might try the ROUND function which defaults to the rounding rules you prefer:

ROUND(36.425,2)

Answer 2

I found an old post on a forum here which states that the RoundHalfwayMagUp controls whether .5 rounds up or down. See the docs for more info

Answer 3

because in 36.425, 5 is near to 0 not to 10, if you put 36.426 it will round of to 36.43

Round :

It will work like below

between 0 and 5 > increment by 0( replaced )

between 5 to 10 > increment by 1 ( replaced)