如何识别小数点后只有零的记录？

Question

请参阅屏幕截图：

您将如何编写case语句来识别小数点后只有零的记录。

这是我的select case语句的结构如下：

SELECT CASE WHEN (ONLY ZEROS AFTER 
DECIMAL POINT)
THEN CAST(VALUE AS int) FROM MyTable

---

我之所以保留varchar(25)只是因为还有两个字段需要与上述数字组合。

Answer 1

一种方法是：

'The truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all().

Answer 2

您可以执行与Gordon答案类似的操作，但是要考虑到您将数字存储为varchar(25)

declare @mytable table (value varchar(25) not null)
insert into @mytable (value) values ('1.31'),('5.00'),('2.500'),('6.00'),('8.0000'),('1.0'),('3.0000000')

select coalesce(cast((case when DecimalValue = floor(DecimalValue) then cast(DecimalValue as int) end) as varchar(25)), VarcharValue)
from (select cast(value as decimal(18,9)) as DecimalValue, value as VarcharValue from @mytable) as tmp

http://rextester.com/QRRW4456