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Community Links Social Groups Pictures & Albums Members List Calendar Search Forums Show Threads Show Posts Tag Search Advanced Search Find All Thanked Posts Go to Page... Thread Tools Rating: Display Modes 04-23-2010, 08:12 AM #1 ms access null date value BrokenBiker ManicMechanic Join Date: Mar 2006 Location: Not where I should... Posts: 128 access set date field to null Thanks: 0 Thanked 0 Times in 0 Posts Null Date Value and String vs Date and #Error I have a query w/a calculated filed how to insert null value in datetime field in ms access (TngDue). Some of those records have no date. When I use CDate to convert the TngDue field to a date format, the records w/o date entries give me an #Error. I've tried to use IIf and IsNull to get ms access insert null into date field rid of the #Errors and still maintain a date format, but am so far unsuccessful. Code: TngDueDate: IIf(IsNull([TngDue]),"",CDate([TngDue])) It seems that if I try to handle the null values to get rid of the #Errors, I have to live w/a text string. If I want a date value, I'll have to live w/the #Errors. Is there any way to handle null values w/a date field and still have the result as a date as opposed to a string?
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BrokenBiker View Public Profile Find More Posts by BrokenBiker 04-23-2010, 03:36 PM #2 Galaxiom Super Moderator Join Date: Jan 2009 Location: NSW Australia Posts: 10,243 Thanks: 51 Thanked 1,170 Times in 1,107 Posts Re: Null Date Value and String vs Date and #Error The Null string is not valid in a date field. TngDueDate: IIf(IsNull([TngDue]),Null,CDate([TngDue])) Galaxiom View Public Profile Find More Posts by Galaxiom 04-23-2010, 06:47 PM #3 BrokenBiker ManicMechanic Join Date: Mar 2006 Location: Not where I should... Posts: 128 Thanks: 0 Thanked 0 Times in 0 Posts Re: Null Date Value and String vs Date and #Error Thanks for the reply, but that gave me the same #Error. Is there a way to use the IsDate fx? Possibly If Not (IsDate(TngDue)...etc....? I'll give it a shot and see what it does. BrokenBiker View Public Profile Find More Posts by BrokenBiker 04-24-2010, 05:18 AM #4 BrokenBiker ManicMechanic Join Date: Mar 2006 Location: Not where I should... Posts: 128 Thanks: 0 Thanked 0 Times in 0 Posts Re: Null Date Value and String vs Date and #Error Yep, that did it! TngDueDate: IIf(Not IsDate([TngDue]),Null,CDate([TngDue])) BrokenBiker View Public Profile Find More Posts by BrokenBiker 04-25-2010, 02:31 AM #5 Galaxiom Super Moderator Join Date: J
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Us Learn more about Stack Overflow the company Business Learn more about hiring access is null developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up date error handling in Access SQL http://www.access-programmers.co.uk/forums/showthread.php?t=191989 up vote 1 down vote favorite I have a table x with the following values of type Text: +-----------+ | dateValue | +-----------+ | 12/9/1906 | | 7/49/54 | | 27945 | +-----------+ I want to query this table and return the date equivalent of each string, or the original string and an error indicator if the string cannot be parsed to a date. I tried this: http://stackoverflow.com/questions/26519337/date-error-handling-in-access-sql select iif(isError(cdate(dateValue)),dateValue&" isError",cdate(dateValue)) as parseDate from x which should return 7/49/54 isError for the invalid string, but that query instead returns: +-----------+ | parseDate | +-----------+ | 12/9/1906 | | #Error | | 7/4/1976 | +-----------+ Is there any way to handle the invalid date string to return the desired result? EDIT: added the cdate() parse in the query. sql ms-access share|improve this question asked Oct 23 '14 at 0:23 sigil 3,5191361110 add a comment| 2 Answers 2 active oldest votes up vote 1 down vote I would use IsDate() function instead of IsError() because CDate() would throw an #Error if argument is not a valid date expression. Try this one: select iif(IsDate(dateValue), cdate(dateValue), dateValue & " isError") as parseDate from x share|improve this answer answered Oct 23 '14 at 4:51 mdialogo 1489 This doesn't parse the 27945 value correctly; I had to use this for the conditional check instead: isdate(dateValue) or isnumeric(dateValue) –sigil Oct 23 '14 at 21:59 add a comment| up vote 0 down vote You are trying to mix types. You have a string in one row and a date in another. That isn't possible. You could do: select iif(isError(cdate(dateValue)),dateValue&" isError", dateV
message about data type mismatch Applies To: Access 2016, Access 2013, Access 2010, Access 2007, Less Applies To: Access 2016 , Access 2013 , Access 2010 , Access 2007 , More... Which version do I have? More... This error indicates that Access cannot match an input value to the data type it expects https://support.office.com/en-us/article/I-get-a-message-about-data-type-mismatch-c75b62ff-bcfd-4bb0-83f8-8129f372d59f for the value. For example, if you give Access a text string when it is expecting http://allenbrowne.com/ser-36.html a number, you receive a data type mismatch error. To troubleshoot this message, try the following: If you just changed the Default Value for a field in a table and see a message about data type mismatch when you try to enter new records, open the table in Design view and make sure the expression you use for the field's Default Value evaluates as the same data ms access type as the field. For example, if the field has the Number data type, make sure you don't put quote marks around the Default Value expression (e.g., "1" would evaluate as text, not a number.) Verify that the criteria for a column matches the data type of the column's underlying field. If you specify text criteria for a numeric or date/time field, you'll get this error. As an example, if you type the criteria "50" or "12/13/12", an error message is returned because Access date error access interprets values in quote marks as text, not numbers. So be sure to remove those quote marks. You'll know when you enter a valid date in the Criteria field because # signs will appear around the date, like #12/13/12#. Other situations that cause a data type conflict include: You're specifying criteria for a Lookup field, and the criteria use the values that are shown (like a name) in the lookup list instead of their associated foreign key values (like an ID). Because the foreign key values are the values actually stored in the underlying table, you should use them when you specify criteria for a field. You typed the dollar sign ($) in criteria you specified for a Currency field. Remove the dollar sign, and then view the results. You can tell if the numeric criteria you entered isn't a number if it has quote marks around it. When you type the $ sign, Access automatically encloses the string you type in quote marks. Verify that the data type of each pair of joined fields in the query is the same. If not, change the data type of one of the joined fields to match the data type of the other so you don't get the mismatch error. Share Was this information helpful? Yes No Great! Any other feedback? How can we improve it? Send No thanks Thank you for your feedback! × English (United States) Contact Us Privacy & Cookies Terms of use & sale Trademarks Accessibility Legal ©
date separators are dots or dashes, not slashes. If you are outside the USA, or developing applications that may be used in other countries, you must know to handle dates in Access. When you type a date into Access, your entry is stored as a number, where the integer part represents the date and the fraction part the time (part of a day). Things can go wrong at four points: Access misinterprets a date entry. You fail to format dates correctly in code. Access does not know an entry is a date. You use WeekdayName(). For information on date standards beyond Access, see ISO 8601. For details on how to get the user's regional settings, see Michael Kaplan's basIntlFormats code. 1. Misinterpretation in the User Interface Define the date format for your locale in Windows Control Panel | Regional Settings. You can therefore use your local date format when you enter dates into the user interface part of Access: tables, queries, forms, or the Criteria of Query Design View. Unfortunately, Microsoft tried to be too smart at helping Access accept dates. If you enter a date that is invalid for your local settings, Access spins the date around trying to find an interpretation that works. For example, with British dates in Control Panel, if you enter 10/13/01, Access realises there is no 13th month, and decides you must have intended 13-Oct-01. The results can be bizarre. The entry 02/29/01 should generate an error message that 2001 is not a leap year. It doesn't. Instead, Access plays with the entry and decides you must have intended Feb-1-2029 !!! Aside from this madness (which cannot be turned off), just remember the user interface in Access uses the local Control Panel settings to interpret dates typed into the user interface. 2. Wrong Formatting in Code In VBA code, delimit dates with the "#" symbol. Regardless or your regional settings, Access expects these literal dates to be in the American format, e.g. #12/31/1999#. To demonstrate t