Concatenate Text Fields to Date Field

Concatenate Text Fields to Date Field

Post by YWxob3Rja » Fri, 21 May 2010 00:55:01


I have three (3) columns in a table which represent the month, day, and year.
The values in these columns are 04 (month) 21 (day) 2010 (year). I want to
insert these thre values into another table where the field in the record is
a Date/Time type. Here's the SQL statement (in part):

INSERT INTO ....... SELECT [tblTable].[fMonth] & "/" & [tblTable].[fDay] &
"/" & [tblTable].[fYear] AS fDate

I get an error about this "append" that complains about "... set 1 fields(s)
to Null due to type conversion failure, and it didn't add 0 record(s) the the
table ..." However, the value gets entered into the destination table.

The field type for fDate is Date/Time. The three fileds for month, day,
year, are text. The concatination works in that the string is together but I
want to correct the "type conversion failure" error.
 
 
 

Concatenate Text Fields to Date Field

Post by RG9yaWF » Fri, 21 May 2010 01:02:01

Try surrounding whole thing with CDate( )
e.g.
INSERT INTO ....... SELECT CDate([tblTable].[fMonth] & "/" &
[tblTable].[fDay] &
"/" & [tblTable].[fYear]) AS fDate

or maybe try...

INSERT INTO ....... SELECT "#" & [tblTable].[fMonth] & "/" &
[tblTable].[fDay] &
"/" & [tblTable].[fYear] & "#" AS fDate

regardless it wont work if your tblTable contains null in any year/month/day
field or if any constructed date is invalid.

-- Dorian
"Give someone a fish and they eat for a day; teach someone to fish and they
eat for a lifetime".

 
 
 

Concatenate Text Fields to Date Field

Post by SmVycnkgV2 » Fri, 21 May 2010 01:25:01

Good point. I would run something like this first:

SELECT [tblTable].[fMonth], [tblTable].[fDay], [tblTable].[fYear]
FROM tblTable
WHERE IsDate([tblTable].[fMonth] & "/" &
[tblTable].[fDay] & "/" & [tblTable].[fYear]) = False

This will show any problem records.
--
Jerry Whittle, Microsoft Access MVP
Light. Strong. Cheap. Pick two. Keith Bontrager - Bicycle Builder.
 
 
 

Concatenate Text Fields to Date Field

Post by YWxob3Rja » Fri, 21 May 2010 01:33:01

Thanks for the prompt reply, Dorian. The CDate statement did not work.
Neither did the "#" parameter. In both cases, the "append" did not work. No
records were "appended". However, when I use my origial SELECT statement, the
records do get updated even though I get the "type violation fialure" message.
 
 
 

Concatenate Text Fields to Date Field

Post by Bob Barrow » Fri, 21 May 2010 01:38:45


Try DateSerial instead:

INSERT INTO ....... SELECT
DateSerial([tblTable].[fYear],[tblTable].[fMonth] , [tblTable].[fDay])
AS fDate

Test by running it without the INSERT part to make sure valid dates are
being created. There may be data in one of the rows that makes it
impossible to create a date.

--
HTH,
Bob Barrows
 
 
 

Concatenate Text Fields to Date Field

Post by YWxob3Rja » Fri, 21 May 2010 02:43:01

Thanks to all of you for your input. I have found that one of the records
that I am trying to "append" has "zero" values in the fMonth, fDay, and fYear
fields. When I correct the invalid values, my original INSERT INTO query
works. Jerry Whittle's reply would catch these "zero" value entries.

I'm back in business. Thanks for enlightening me on the options to use
CDate, DateSetial, and IsDate functions in my expressions. You ALWAYS learn
something new when working with these forums.