How to define if a string is date or datetime? - sql

Question

I have incoming string, for instance 12.10.03 00:00:00.0000000. How to define if there is time in this string or just date?
Note that, date and time can have different formats. For example:
date can be January 03, 2012
time can be 1:1

Answer 1

If this doesn't return zero there is time:
SELECT DATEDIFF(SECOND,#VariableOrColumn,CAST(#VariableOrColumn AS DATE))
Add more precision for DATETIME2(7) by adding nano seconds if needed.

Answer 2

Use the LIKE operator;
if (#MyString like '%[0-9][0-9]:[0-9][0-9]:[0-9][0-9]%') ...

Answer 3

You can write as:
SELECT CASE WHEN PATINDEX( '%:%','12.10.03 00:00:00.0000000')> 0 THEN 'datetime'
ELSE 'Date' END AS Result
and to validate a date you can use ISDATE function.

Answer 4

You can take like this:
SELECT x = SUBSTRING('12.10.03 00:00:00.0000000', 1, 8);
Edit code for different formats;
SUBSTRING('12.10.03 00:00:00.0000000', 1,CHARINDEX(' ','12.10.03 00:00:00.0000000'));

Answer 5

First cast your string as datetime to put it in a proper format then just cast the resulting datetime as time and compare it with midnight as time and viola:
Select Case when Cast(Cast(#yourstring as datetime) as Time) = Cast('00:00:00.0000000' as time) then Cast(#yourstring as date) else Cast(#yourstring as datetime) end

Answer 6

if(#x='12.10.03').it is valid datetime and time is 00:00:00
if(#x='12.10.03 00:00:00.0000000').it is valid datetime and time is again 00:00:00
So what do you mean by saying if it contain time.
you can test this script thoroughly with different input .I tested and its running fine .
BEGIN TRY
declare #x varchar(32) = '12.10.03 00:00:00.0000000'
-- or '12.10.03' or '00:00:00.0000000' or '0000000' or 'fgdfgg'
Declare #outputdt datetime2(7)
Declare #hr int
Declare #minute int
Declare #sec int
set #outputdt=#x
--select #outputdt
if isdate(LEFT(#x, 21))=1
BEGIN
select LEFT(#x, 21)
select #hr=DATEPART(hour,#outputdt)
,#minute=DATEPART(minute,#outputdt)
,#sec=DATEPART(minute,#outputdt)
END
else
BEGIN
select #hr=DATEPART(hour,#outputdt)
,#minute=DATEPART(minute,#outputdt)
,#sec=DATEPART(minute,#outputdt)
select 'Not valid1'
END
END TRY
BEGIN CATCH
select 'not valid'
END CATCH
select #hr,#minute
if(#hr>0)
select 'Todo'

Answer 7

After some r&d , I do this and I think this will help you.
You are not mention Sql version, so this sample will work SQLSERVER2008 and above
For more info :-
http://blog.sqlauthority.com/2012/09/12/sql-server-get-date-and-time-from-current-datetime-sql-in-sixty-seconds-025-video/
declare #s nvarchar(200) = '12.10.03' -- 00:00:00.0000000'
--select CONVERT(time, #s)
Select
case
when isdate(#s ) = 1
then
case
when CONVERT(time, #s) = '00:00:00.0000000'
then 'no time'
else 'it has time'
end
else
'no time'
end
as dateHaveTimeOrNOT
set #s = '12.10.03 01:20:00'
Select cast (#s as date) , isdate(#s ),CONVERT(time, #s),
case
when isdate(#s ) = 1
then
case
when CONVERT(time, #s) = '00:00:00.0000000'
then 'no time'
else 'it has time'
end
else
'no time'
end
as dateHaveTimeOrNOT