我怎样才能得到小数后面的数字?

How do I get only the numbers after the decimal?

如何只得到小数后面的数?

Example: 2.938 = 938

例如:2.938 = 938

10 个解决方案

#1

one way, works also for negative values

一种方法，也适用于负值

declare @1 decimal(4,3)
select @1 = 2.938

select PARSENAME(@1,1)

#2

try this:

试试这个:

SELECT (num % 1)

#3

You can use FLOOR:

您可以使用地板:

select x, ABS(x) - FLOOR(ABS(x))
from (
    select 2.938 as x
) a

Output:

输出:

x                                       
-------- ----------
2.938    0.938

Or you can use SUBSTRING:

或者可以使用子字符串:

select x, SUBSTRING(cast(x as varchar(max)), charindex(cast(x as varchar(max)), '.') + 3, len(cast(x as varchar(max))))
from (
    select 2.938 as x
) a

#4

The usual hack (which varies a bit in syntax) is

通常的hack(在语法上有所不同)是。

x - floor(x)

That's the fractional part. To make into an integer, scale it.

小数部分。要使其成为整数，请对其进行缩放。

(x - floor(x)) * 1000

#5

More generalized approach may be to merge PARSENAME and % operator. (as answered in two of the answers above)

更广义的方法可能是合并PARSENAME和%运算符。(如以上两个答案所述)

Results as per 1st approach above by SQLMenace

结果，按第1方法，由sql威胁。

select PARSENAME(0.001,1) 

Result: 001

结果:001

select PARSENAME(0.0010,1) 

Result: 0010

结果:0010

select PARSENAME(-0.001,1)

Result: 001

结果:001

select PARSENAME(-1,1)

Result: -1 --> Should not return integer part

结果:-1——>不应该返回整数部分。

select PARSENAME(0,1)

Result: 0

结果:0

select PARSENAME(1,1)

Result: 1 --> Should not return integer part

结果:1——>不返回整数部分

select PARSENAME(100.00,1)

Result: 00

结果:00

Results as per 1st approach above by Pavel Morshenyuk "0." is part of result in this case.

根据上面帕维尔·莫申约克“0”的第1种方法得出的结果是这种情况下的结果的一部分。

SELECT (100.0001 % 1)

Result: 0.0001

结果:0.0001

SELECT (100.0010 % 1)

Result: 0.0010

结果:0.0010

SELECT (0.0001 % 1)

Result: 0.0001

结果:0.0001

SELECT (0001 % 1)

Result: 0

结果:0

SELECT (1 % 1)

Result: 0

结果:0

SELECT (100 % 1)

Result: 0

结果:0

Combining both:

结合这两个:

SELECT PARSENAME((100.0001 % 1),1)

Result: 0001

结果:0001

SELECT PARSENAME((100.0010 % 1),1)

Result: 0010

结果:0010

SELECT PARSENAME((0.0001 % 1),1)

Result: 0001

结果:0001

SELECT PARSENAME((0001 % 1),1)

Result: 0

结果:0

SELECT PARSENAME((1 % 1),1)

Result: 0

结果:0

SELECT PARSENAME((100 % 1),1)

Result: 0

结果:0

But still one issue which remains is the zero after the non zero numbers are part of the result (Example: 0.0010 -> 0010). May be one have to apply some other logic to remove that.

但是仍然有一个问题仍然存在，那就是非零数之后的0是结果的一部分(示例:0.0010 -> 0010)。也许你必须运用一些其他的逻辑来去除它。

#6

If you know that you want the values to the thousandths, place, it's

如果你想要的值是千分位

SELECT (num - FLOOR(num)) * 1000 FROM table...;

#7

Make it very simple by query:

通过查询使其非常简单:

select substr('123.123',instr('123.123','.')+1, length('123.123')) from dual;

Put your number or column name instead 123.122

把你的号码或列名改为123.122

#8

If you want to select only decimal numbers use this WHERE clause:

如果你想只选择十进制数字使用这个WHERE子句:

    (CAST(RIGHT(Myfield, LEN( Myfield)-CHARINDEX('.',Myfield)+1 ) AS FLOAT)) <> 0

If you want a clear list you can sort by decimal/integer:

如果你想要一个清晰的列表，你可以按十进制/整数排序:

    CASE WHEN 0 = CAST(RIGHT(Myfield, LEN( Myfield)-CHARINDEX('.',Myfield)+1 ) AS FLOAT) THEN 'Integer' ELSE 'Decimal' END AS Type

#9

You can use RIGHT :

你可以使用权利:

 select RIGHT(123.45,2) return => 45

#10

CAST(RIGHT(MyField, LEN( MyField)-CHARINDEX('.',MyField)+1 ) AS FLOAT)

将(右(MyField, LEN(MyField)-CHARINDEX('.'，MyField)+1)转换为FLOAT)