SQL Server日期存储为“ 2016年8月19日星期五，格林尼治标准时间-0400”

Question

I inherited some tables and some of the supposed date columns have this type of value Fri Aug 19 2016 01:00:00 GMT-0400 in them. How could I convert it to just mm/dd/yyyy hh:mm in my query?

I tried a lot of things and it keeps complaining

Cannot convert from string to datetime format

Thanks in advance!

Answer 1

It sounds like your columns are not datetimes but strings. It would be better to convert those columns to the datetime type. But you can achieve what your looking for with something like this:

SELECT CONVERT(varchar, CONVERT(datetime, SUBSTRING(mydatecolumn,5,20)), 101) 
       + ' ' + 
       CONVERT(varchar, CONVERT(datetime, SUBSTRING(mydatecolumn,5,20)), 8)

Answer 2

Below query works in SQL Server 2012 and not considering UTC value

DECLARE @Input varchar(32), @Output VARCHAR(32)
SELECT @Input = 'Fri Aug 19 2016 1:00:00 GMT-400'
SELECT @Output = FORMAT(CONVERT(DATETIME, STUFF(STUFF(@Input, 1, 4, ''), PATINDEX('%[^0-9 :]%', LTRIM(SUBSTRING(STUFF(@Input, 1, 4, ''), PATINDEX('%[^A-Z]%', STUFF(@Input, 1, 4, '')), LEN(STUFF(@Input, 1, 4, ''))))) + PATINDEX('%[^A-Z]%', STUFF(@Input, 1, 4, '')), LEN(STUFF(@Input, 1, 4, '')), '')), 'MM/dd/yyyy HH:mm')
SELECT @Output

Answer 3

If the Date string values have the same exact format (ie ddd mmm dd yyyy hh:nn:ss) then the following should work:

DECLARE @Dt NVARCHAR(50) = 'Fri Aug 19 2016 01:00:00 GMT-0400'

SELECT
    CAST(CONVERT(VARCHAR(20), SUBSTRING(@Dt, CHARINDEX(' ', @Dt) + 1, LEN(@Dt)), 120) AS DATETIME)

SqlFiddle