Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

datetime format error

Posted on 2014-09-26
12
Medium Priority
?
185 Views
Last Modified: 2014-09-26
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
Comment
Question by:Mehram
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
12 Comments
 
LVL 24

Expert Comment

by:Phillip Burton
ID: 40345756
Insert of using CONVERT, use TRY_CONVERT.
0
 
LVL 24

Expert Comment

by:Phillip Burton
ID: 40345757
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
 
LVL 143

Accepted Solution

by:
Guy Hengel [angelIII / a3] earned 2000 total points
ID: 40345758
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...
0
Free Backup Tool for VMware and Hyper-V

Restore full virtual machine or individual guest files from 19 common file systems directly from the backup file. Schedule VM backups with PowerShell scripts. Set desired time, lean back and let the script to notify you via email upon completion.  

 

Author Comment

by:Mehram
ID: 40345760
same error
0
 
LVL 4

Expert Comment

by:Nuno Rogado
ID: 40345761
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
 
LVL 24

Expert Comment

by:Phillip Burton
ID: 40345763
To whom are you commenting, Mehram?

If to me, my code does not produce an error.
0
 

Author Comment

by:Mehram
ID: 40345771
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
 
LVL 24

Expert Comment

by:Phillip Burton
ID: 40345775
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
 

Author Comment

by:Mehram
ID: 40345779
Hi phillip Button

I did mention , my sql server version in my question.
0
 

Author Closing Comment

by:Mehram
ID: 40345780
Isdate() worked.

any other idea will be appreciated.

thanks
0
 
LVL 24

Expert Comment

by:Phillip Burton
ID: 40345782
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
 

Author Comment

by:Mehram
ID: 40345786
<<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

Featured Post

New feature and membership benefit!

New feature! Upgrade and increase expert visibility of your issues with Priority Questions.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

There are some very powerful Dynamic Management Views (DMV's) introduced with SQL 2005. The two in particular that we are going to discuss are sys.dm_db_index_usage_stats and sys.dm_db_index_operational_stats.   Recently, I was involved in a di…
In this article I will describe the Backup & Restore method as one possible migration process and I will add the extra tasks needed for an upgrade when and where is applied so it will cover all.
This course is ideal for IT System Administrators working with VMware vSphere and its associated products in their company infrastructure. This course teaches you how to install and maintain this virtualization technology to store data, prevent vuln…
Monitoring a network: how to monitor network services and why? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the philosophy behind service monitoring and why a handshake validation is critical in network monitoring. Software utilized …

722 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question