Question

我试图阻止在任何范围内处理负值的输入，而如果它们是负数，则它们应该下降到第一个案例语句的末尾为“无效”。这不起作用，因为当我对（-1000）的输入运行测试时，我得到＆lt; = 50K的行。我担心我的语法错了，但不知道为什么。

ALTER FUNCTION [dbo].[FN_1ST_UPB_Bands]
(
    @FN_1ST_UPB_Band            int
     )

RETURNS varchar(16)
AS
BEGIN

declare @Return varchar (16)

select @Return =

        Case
           When ISNUMERIC(@FN_1ST_UPB_Band)= 1 then  

        case 
            When @FN_1ST_UPB_Band is NULL then  '    Missing'
            When @FN_1ST_UPB_Band = 0 then '  0'
            When @FN_1ST_UPB_Band < = 50000 then ' <=50K'
            When @FN_1ST_UPB_Band between 50000 and 100000 then ' 50-100'
            When @FN_1ST_UPB_Band between 100000 and 150000 then '100-150'
            When @FN_1ST_UPB_Band between 150000 and 200000 then '150-200'
            When @FN_1ST_UPB_Band between 200000 and 250000 then '200-250'
            When @FN_1ST_UPB_Band between 250000 and 300000 then '250-300'
            When @FN_1ST_UPB_Band between 300000 and 350000 then '300-350'
            When @FN_1ST_UPB_Band between 350000 and 400000 then '350-400'
            When @FN_1ST_UPB_Band between 400000 and 450000 then '400-450'
            When @FN_1ST_UPB_Band between 450000 and 500000 then '450-500'
            When @FN_1ST_UPB_Band > 500000 then '500K+'
            else null End
         else 'Invalid' End

    RETURN @return
End

Answer 1

ISNUMERIC在INT字段上始终为true，您可以安全地将其丢弃。

试试这个：

declare @FN_1ST_UPB_Band INT
SET  @FN_1ST_UPB_Band = -1000

select  case 
            When @FN_1ST_UPB_Band is NULL then  '    Missing'
            When @FN_1ST_UPB_Band < 0 Then 'Invalid'
            When @FN_1ST_UPB_Band = 0 then '  0'
            When @FN_1ST_UPB_Band < = 50000 then ' <=50K'
            When @FN_1ST_UPB_Band between 50000 and 100000 then ' 50-100'
            When @FN_1ST_UPB_Band between 100000 and 150000 then '100-150'
            When @FN_1ST_UPB_Band between 150000 and 200000 then '150-200'
            When @FN_1ST_UPB_Band between 200000 and 250000 then '200-250'
            When @FN_1ST_UPB_Band between 250000 and 300000 then '250-300'
            When @FN_1ST_UPB_Band between 300000 and 350000 then '300-350'
            When @FN_1ST_UPB_Band between 350000 and 400000 then '350-400'
            When @FN_1ST_UPB_Band between 400000 and 450000 then '400-450'
            When @FN_1ST_UPB_Band between 450000 and 500000 then '450-500'
            When @FN_1ST_UPB_Band > 500000 then '500K+'
            else null
        End

Answer 2

在那种情况下（没有双关语）

这样做

When @FN_1ST_UPB_Band < 0 Then 'Invalid'
When @FN_1ST_UPB_Band >= 0 and @FN_1ST_UPB_Band < = 50000 then ' <=50K'

因为-1000小于50000

Answer 3

因为它们是按顺序计算的，所以-1000是＆lt; = 50000，所以它的计算结果为true并返回“＆lt; = 50000”。您需要between 1 and 49999代替（不是50000，因为50000会在2种情况下评估为真）。

Answer 4

好不是-1000还不到50000？你不需要那个案子：

当@ FN_1ST_UPB_B介于0和49999之间时，'＆lt; = 50K'

在案例中需要测试ISNUMERIC的语法帮助

4 个答案: