Conversion failed when converting datetime from character string

I have a strange problem that I need help troubleshooting. I have the
following statement in a stored procedure:
SELECT IsNull(NullIf(Convert(varchar(20), Cast(Value AS datetime), 126), '')
,
'')
FROM #TFieldValues TFV
WHERE TFV.DataType = 'Date'
When this statement is run, it returns the following error;
Msg 241, Level 16, State 1, Procedure <the name of my procedure>, Line 142
Conversion failed when converting datetime from character string.
The field #TFieldValues.Value is created as varchar(2000).
So, I run the following statement, and 21 rows are returned, where 8 are dat
e
values and 13 are empty strings:
SELECT Value FROM #TFieldValues WHERE DataType = 'Date'
The 8 date values returned are the following:
2/23/2006
03/21/2006
08/23/2006
1O/18/2OO5
1O/18/2OO5
1O/18/2OO5
02/26/2007
02/26/2007
I then run the following statement
SELECT
TFV.Value
FROM #TFieldValues TFV
WHERE
CASE
WHEN ISDATE(Value) = 0 THEN 0
WHEN ISDATE(Value) = 1 THEN 1
END = 1
AND TFV.DataType = 'Date'
Instead of 8 date values being returned, I only return 5, which are the
following:
2/23/2006
03/21/2006
08/23/2006
02/26/2007
02/26/2007
In just looking at the returns in the grid in Management Studio, when I run
the select statement that returned the 8 date values, it appears the
1O/18/2OO5 values are of a different font size. This can probably even be
seen as you compare the zero's from the following paste:
08/23/2006
1O/18/2OO5
Any ideas on validation, or handling this situation?
Message posted via droptable.com
http://www.droptable.com/Uwe/Forum...server/200703/1"cbrichards via droptable.com" <u3288@.uwe> wrote in message
news:6f39ac268793b@.uwe...
>I have a strange problem that I need help troubleshooting. I have the
> following statement in a stored procedure:
> SELECT IsNull(NullIf(Convert(varchar(20), Cast(Value AS datetime), 126),
> ''),
> '')
> FROM #TFieldValues TFV
> WHERE TFV.DataType = 'Date'
> When this statement is run, it returns the following error;
> Msg 241, Level 16, State 1, Procedure <the name of my procedure>, Line 142
> Conversion failed when converting datetime from character string.
> The field #TFieldValues.Value is created as varchar(2000).
> So, I run the following statement, and 21 rows are returned, where 8 are
> date
> values and 13 are empty strings:
> SELECT Value FROM #TFieldValues WHERE DataType = 'Date'
> The 8 date values returned are the following:
> 2/23/2006
> 03/21/2006
> 08/23/2006
> 1O/18/2OO5
> 1O/18/2OO5
> 1O/18/2OO5
> 02/26/2007
> 02/26/2007
> I then run the following statement
> SELECT
> TFV.Value
> FROM #TFieldValues TFV
> WHERE
> CASE
> WHEN ISDATE(Value) = 0 THEN 0
> WHEN ISDATE(Value) = 1 THEN 1
> END = 1
> AND TFV.DataType = 'Date'
> Instead of 8 date values being returned, I only return 5, which are the
> following:
> 2/23/2006
> 03/21/2006
> 08/23/2006
> 02/26/2007
> 02/26/2007
> In just looking at the returns in the grid in Management Studio, when I
> run
> the select statement that returned the 8 date values, it appears the
> 1O/18/2OO5 values are of a different font size. This can probably even be
> seen as you compare the zero's from the following paste:
> 08/23/2006
> 1O/18/2OO5
No - it isn't a font issue. These are capital O characters, not zeros.
Switch to a font that uses slashed zeros and you will more clearly see this.
Consider this one of the "advantages" to using the EAV data model - store
anything