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datetime format error

SQL Server 2005

I was reading an excel file from sql server query and got this error.
"Conversion failed when converting datetime from character string"
There were some issues in dateformat, which I found out manually looking one
by one row.

I am simulating the problem like this

declare @t table( dt varchar(50), tm varchar(50))
insert @t select '25-Sep-2014','06:19:32 pm'
insert @t select '24-Sep-2014','06:17:45 pm'
insert @t select '23-Sep-2014','06:44:35 pm'
insert @t select '23-Sep-2014','06:27:43 pm'
insert @t select '21-Sep-2014','06:19:39 pm'
insert @t select '20-eep-2014','06:19:01 pm'
insert @t select '19-Sep-2014','06:19:07 pm'
insert @t select '20-Sep-2014','06:19:08 pm'
insert @t select '18-Sep-2014','06:19:09 pm'


select convert(datetime,dt + ' ' + tm)
from @t
there will be error   "Conversion failed when converting datetime from character string"

my question is how to find by query which row has invalid format.
0
Mehram
Asked:
Mehram
1 Solution
 
Phillip BurtonDirector, Practice Manager and Computing ConsultantCommented:
Insert of using CONVERT, use TRY_CONVERT.
0
 
Phillip BurtonDirector, Practice Manager and Computing ConsultantCommented:
So change the last bit of your code to:

select dt, tm, try_convert(datetime,dt + ' ' + tm) as Combined
from @t
where try_convert(datetime,dt + ' ' + tm) is null

Open in new window

0
 
Guy Hengel [angelIII / a3]Billing EngineerCommented:
your code is assuming implicit data type conversion (type), see here:
http://www.experts-exchange.com/Database/Miscellaneous/A_1499-DATE-and-TIME-don%27t-be-scared-and-do-it-right-the-first-time.html

to check the date value, you could try to use isdate() function, but which doesn't have the option to specify which "style" to use in the convert function.

you could then change your sql login settings to use a language which has the relevant "style" value as default, or create a function that catches the error to tell...
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MehramAuthor Commented:
same error
0
 
Nuno RogadoCommented:
Hi,

Change it to:

declare @t table( dt varchar(50), tm varchar(50))
insert @t select '09-25-2014','06:19:32 pm'
select convert(datetime,dt + ' ' + tm)
from @t

It will work.

Best Regards,
Nuno Rogado
0
 
Phillip BurtonDirector, Practice Manager and Computing ConsultantCommented:
To whom are you commenting, Mehram?

If to me, my code does not produce an error.
0
 
MehramAuthor Commented:
Hi Guy Hengel [angelIII / a3]
thats what I wanted

select dt, tm, isdate (dt + ' ' + tm)
from @t

dt      tm      (No column name)
25-Sep-2014      06:19:32 pm      1
24-Sep-2014      06:17:45 pm      1
23-Sep-2014      06:44:35 pm      1
23-Sep-2014      06:27:43 pm      1
21-Sep-2014      06:19:39 pm      1
20-eep-2014      06:19:01 pm      0
19-Sep-2014      06:19:07 pm      1
20-Sep-2014      06:19:08 pm      1
18-Sep-2014      06:19:09 pm      1
0
 
Phillip BurtonDirector, Practice Manager and Computing ConsultantCommented:
So change your last bit of your code to:

select dt, tm, iif(try_convert(datetime,dt + ' ' + tm) is null, 0, 1)
from @t

Open in new window

0
 
MehramAuthor Commented:
Hi phillip Button

I did mention , my sql server version in my question.
0
 
MehramAuthor Commented:
Isdate() worked.

any other idea will be appreciated.

thanks
0
 
Phillip BurtonDirector, Practice Manager and Computing ConsultantCommented:
Does this work?

select dt, tm, case when try_convert(datetime,dt + ' ' + tm) is null then 0 else 1 end
from @t

Open in new window

0
 
MehramAuthor Commented:
<<select dt, tm, case when try_convert(datetime,dt + ' ' + tm) is null then 0 else 1 end
from @t>>

I am working in SQL Server 2005
0

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