使用临时表删除硬编码值的问题

Problem in removing hardcoded values using temp table(使用临时表删除硬编码值的问题)

问题描述

首先祝大家新年快乐.我在编写查询时遇到问题.执行查询时出现错误.

First of all Wish u all Happy New Year. I have a problem in writing query. While executing my query I am getting an error.

查询:

select case 

when S.R1 = '6' then 5

when S.R1 =  '7' then 6

when S.R1 = '8' then 7

when S.R1 = '9' then 8

when S.R1 ='10' then 9 

else S.R1 end as Q

FROM [HelpService].[dbo].[help] s
-----------------------------------------------

SELECT [Source], [Score] 

INTO #Temp_Q

FROM [HelpDesk].[dbo].[Survey] 

WHERE [data_Source Name] = 'Text Data'

-----------------------------------------------

select CONVERT(REAL, a.[Dell Score]) as Q

FROM [HelpService].[dbo].[help] s

LEFT OUTER JOIN #CE_Temp_Q a on

s.[R1] = a.[Source] 

错误

消息 8114，级别 16，状态 5，第 1 行

Msg 8114, Level 16, State 5, Line 1

将数据类型 varchar 转换为 real 时出错.

Error converting data type varchar to real.

我被要求做的是我需要删除硬编码值并需要使用临时表编写查询.

What I am asked to do is I need to remove the hard coded values and need to write queries with a temp table.

提前致谢，夏什拉

推荐答案

将数据类型 varchar 转换为 real 时出错

Error converting data type varchar to real

这意味着您的一个值包含一些不是数字的东西.

This means one of your values contains somthing that isn't a Number.

例如以下工作正常

SELECT convert(Real, '1')
UNION SELECT convert(Real, ' ')
UNION SELECT convert(Real, NULL)
UNION SELECT convert(Real, '123.123')
UNION SELECT convert(Real, '   456  ')

但是以下任何一项都会产生与您相同的错误

​ But either of the following will yield the same error you are getting

SELECT convert(Real, '   456  ')


SELECT CONVERT(Real, '1 2')

更新

有时问题值是什么并不那么明显

Sometimes its not so obvious what the problem values are

尝试以下方法找到它

SELECT DISTINCT 
        a.[Dell Score]
FROM 
      [HelpService].[dbo].[help] s
      LEFT OUTER JOIN #CE_Temp_Q a on
      s.[R1] = a.[Source]

或

  SELECT DISTINCT 
        a.[Dell Score],
        DATALENGTH (a.[Dell Score])
  FROM 
      [HelpService].[dbo].[help] s
      LEFT OUTER JOIN #CE_Temp_Q a on
      s.[R1] = a.[Source]

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