[英]SQL Server 2017 Convert Varchar to Date
I have a date stored as nvarchar
which I cannot seem to convert to a date.我有一个存储为nvarchar
的日期,我似乎无法将其转换为日期。
I have tried the following but get the error message我尝试了以下但收到错误消息
Conversion failed when converting date and/or time from character string从字符串转换日期和/或时间时转换失败
select cast([month-year] as date) from [Reporting].[AIM].[Hires_PBI]
select convert(date, [month-year], 103)from [Reporting].[AIM].[Hires_PBI]
Any ideas here?这里有什么想法吗?
Find the values that are causing the problem using try_convert()
:使用try_convert()
查找导致问题的值:
select [month-year]
from [Reporting].[AIM].[Hires_PBI]
where try_convert(date, [month-year], 103) is null and
[month-year] is not null;
Once you see what values are causing the problem, you can adjust the conversion logic to convert all values.一旦您看到导致问题的值,您就可以调整转换逻辑以转换所有值。 Or just use try_convert()
to get NULL
for the non-convertible values.或者只是使用try_convert()
来获取NULL
以获得不可转换的值。
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