SQL Datetime format change - sql-server

Question

I am having below formatted Date time value in my SQL Server database table.
2017-02-01 14:31:53.000
2017-09-01 14:54:11.000
I want to swap the Month & Date values like
2017-01-02 14:31:53.000
2017-01-09 14:54:11.000
Is there any way to achieve it?
There are multiple records with such format.
I tried using Excel to convert the same and create query. but it is not working.

Answer 1

As I wrote in my comment, DateTime are stored without display format.
If you want to select the dates in a specific format, you need to use either Format() (available in versions 2012 or higher) or CONVERT() (supports only predefined formats)
Now, assuming your desired format is yyyy-mm-dd hh:mi:ss, you can use convert with 120 style:
SELECT CONVERT(char(19), DateTimeColumn, 120) As FormattedDateTime
FROM TableName

Answer 2

/*
#formatString(varchar)
- the format string to use (Examples "dd mm yyyy", "mmm.dd.yy")
Description:
Formats a given date based on the format specified in #formatString
d - one digit day (when applicable)
dd- two digit day
ddd- short day name
dddd- long day name
m- one digit month (when applicable)
mm- two digit month
mmm- short month name
mmmm- long month name
yy- two digit year
yyyy- four digit year
*/
create function dbo.fnFormatDate
(
#inputDate datetime,
#formatString varchar(25)
)
returns varchar(20) as
begin
declare #returnValue varchar(25)
-- Declare local vairables
declare #formattedDate varchar(25),
#day varchar(20), #month varchar(20), #year varchar(20),
#dayFormat varchar(5), #monthFormat varchar(5), #yearFormat varchar(5)
set #dayFormat = ''
set #monthFormat = ''
set #yearFormat = ''
-- Convert the supplied date to day mon year (25 Jan 2008)
set #formattedDate = convert(varchar, #inputDate, 106)
-- If the format string contains a format for the day
if charindex('d', #formatString) > 0
-- Get the day format string
set #dayFormat = master.dbo.fn_pcre_replace(#formatString, '.*?(d{1,4}).*', '$1')
-- If the format string contains a format for the month
if charindex('m', #formatString) > 0
-- Get the month format string
set #monthFormat = master.dbo.fn_pcre_replace(#formatString, '.*? (m{1,4}|M{1,4}).*', '$1')
-- If the format string contains a format for the year
if charindex('y', #formatString) > 0
-- Get the year format string
set #yearFormat = master.dbo.fn_pcre_replace(#formatString, '.?(y{2,4}).', '$1')
-- Format the day value based on the format string for the day
select#day =
case #dayFormat
when 'dd' then master.dbo.fn_pcre_replace(#formattedDate, '^(\d+).*', '$1')
when 'ddd' then substring(datename(dw, #formattedDate), 1, 3)
when 'dddd' then datename(dw, #formattedDate)
else convert(varchar, day(#formattedDate))
end
-- Format the month value based on the format string for the month
select#month =
case #monthFormat
when 'mm' then master.dbo.fn_pcre_replace(convert(varchar, #inputDate, 101), '^(\d+)/.*', '$1')
when 'mmm' then master.dbo.fn_pcre_replace(#formattedDate, '\d+\s(\w+)\s\d+', '$1')
when 'mmmm' then datename(m, #formattedDate)
else convert(varchar, month(#formattedDate))
end
-- Format the year value based on the format string for the year
select#year =
case #yearFormat
when 'yy' then substring(convert(varchar, year(#formattedDate)), 3, 2)
else convert(varchar, year(#formattedDate))
end
set #returnValue = #formatString
-- If the day format was specified
if #dayFormat <> ''
-- Replace the day format string with the actual day value
set #returnValue = master.dbo.fn_pcre_replace(#returnValue, #dayFormat, #day)
-- If the month format was specified
if #monthFormat <> ''
-- Replace the month format string with the actual month
set #returnValue = master.dbo.fn_pcre_replace(#returnValue, #monthFormat, #month)
-- If the year format was specified
if #yearFormat <> ''
-- Replace the year format string with the actual year
set #returnValue = master.dbo.fn_pcre_replace(#returnValue, #yearFormat, #year)
-- Return the formated value
return #returnValue
end