UPDATEing Null Dates
Aug 29, 2005
I've got a few questions on storing dates in an MDB using SQL UPDATE...
(1) I would prefer to have empty date fields really be empty (rather than some unusal date like January 1, 0001 or whatever).
If a textbox.text equals "", what would I set the corresponding field in the database to? Some sort of Null value..?
I tried setting it equal to a DBNull value, but it didn't like that. It said, "Parameter?_10 has no default value."
(2) If a user types garbage into a text box that is supposed to hold a date, CDate(thatTextBox.text) complains loudly.
Is there a cleaner way to test the contents of the text box for valid date than to allow CDate() to attempt the conversion and then clean up the mess afterwards? Maybe something like a IsValidDate("10/11/2001") that would return a true or false.
Here is some code to put this question into context. The Null part does not work.
Dim Null as System.DBNull
[...]
' Prepare Paramater [HireDate]
pm = New OleDb.OleDbParameter
pm.OleDbType = OleDb.OleDbType.DBDate
pm.Value = iif (isdate(cdate(txtHireDate.Text),cdate(txtHireDate. Text), Null)))
dbCmd.Parameters.Add(pm)
[...]
update personnel set [Lastname]=?, [Firstname]=?, [HireDate]=? where [ssno]=?
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Apr 27, 2007
Thanks for your time to look at this... I am working a project that has some checkboxes on a form. I would like to have it so when a checkbox (Check1) is clicked and then the "Submit" button is pressed, it updates a form ("InputH"). I currently have the table set up with Yes/No data types. I need when submit is pressed for the Yes/No checkbox in the table is updated to show a check. Here is what I have so far:
Private Sub Command21_Click()
Dim update As String
If Check1 = True Then
update InputH.Table
Set Completed = (Hazard1 = -1)
Else
update InputH.Table
Set Completed = (Hazard1 = 0)
End If
End Sub
However, when I try to execute the scripting, I am getting an error: "Compile Error: Expected Sub, Function, or Property" and it has the word 'update' highlighted in the line: (update InputH.Table). What could I be doing wrong?
Thanks in advance for your help.
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Jun 23, 2006
Hi again. One other problem I got in my database is updating forms after inserting new data.
Example: I've made a system for sending invoices. Connected to the invoice is serveral order-lines which is shown in a subform (I use access in norwegian so I'm not sure about that name).
I've made another form for inserting these order-lines. The problem occurs when I close the insert-form, with macro. I cant get the invoice form to update. I have to click on a update-buttom (Macro: update)...
Can this be fixed as well?
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Jun 23, 2006
Hi again. One other problem I got in my database is updating forms after inserting new data.
Example: I've made a system for sending invoices. Connected to the invoice is serveral order-lines which is shown in a subform (I use access in norwegian so I'm not sure about that name).
I've made another form for inserting these order-lines. The problem occurs when I close the insert-form, with macro. I cant get the invoice form to update. I have to click on a update-buttom (Macro: update)...
Can this be fixed as well?
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Apr 30, 2015
I'd like to put a WHERE clause where I confont the date in an unbound textbox with the date in the table. In vba I control the null case of the unbound textbox, but I'm not sure how to control the null value in the sql code.here is the code "strDataRiferiment" that I later insert in a concatenated SQL code. The rest of the code works, while this line doesn't. The problem are the null date records present in the table COMMESSE.What I'd like is a WHERE clause that:
- returns records with all null date values and
- returns records with not null values where these dates are < date chosen in the unbound textbox
Code:
Select Case Nz(Me.InizioDataRif.Value, "Null") 'the unbound textbox
Case "Null"
strDataRiferimento = "AND (([if is not null] COMMESSE.DataChiusura =< #" & Format(Me.FineDataRif, "mm/dd/yyyy") & "#) OR (COMMESSE.DataChiusura IS NULL)) "
Case 'etc
'etc..
end select
I tried for example:
Code:
"AND ( IFF ((COMMESSE.DataChiusura,0) IS NOT NULL,
(COMMESSE.DataChiusura,0) =< #" & Format(Me.FineDataRif, "mm/dd/yyyy") & "#) , (COMMESSE.DataChiusura) IS NULL) )) "
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Nov 29, 2007
Hi, I searched the forum for this but the only thread that came close to what I was looking for was this.
http://www.access-programmers.co.uk/forums/showthread.php?t=125240&highlight=null+chart
Basically I have chart in a report thats based on a query that counts the amount of entries per month between two dates inputted by the user.
It all works fine but the chart that is based on the query only shows months that have an entry.
Eg if it counts all dates between the two dates and say the only month that has an entry is July, the chart will only show July. What I want is the other months to show (Null values) as zero, so every month shows. I'm probably missing something basic but can anyone help?
[TextPriDate] is the start date
[TextPriDate2] is the end date
This is the query code (QryDate)
SELECT
tblMain.ID1, tblMain.Dt
FROM
tblMain
WHERE
(((tblMain.Dt) Between [Forms]![frmSwitchboard]![TextPriDate] And [Forms]![frmSwitchboard]![TextPriDate2]));
This the code from the chart in the Report
SELECT
(Format([Dt],"MMM 'YY")) AS Expr1, Count(*) AS [Count]
FROM
QryDate
GROUP BY
(Format([Dt],"MMM 'YY")), (Year([Dt])*12+Month([Dt])-1);
Thanks
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Jul 5, 2013
My issue is that I am trying to update a date field. When I do the date field may have a date or may be a null. When I try to pass in a NULL date with no quotes, I get a syntax error. When I have single quotes in the statement and a null value is passed in, I get an invalid use of date.
Dim DENIEDDATE1 As Date
If (Not IsDate(rs.Fields("DENIED_DATE"))) Then
DENIEDDATE1 = Null
Else
DENIEDDATE1 = "'" & rs.Fields("DENIED_DATE") & "'"
End If
update table1 set table1.denieddate = " & denieddate1 & " 'get Update syntax error with this statement
update table1 set table1.denieddate = '" & denieddate1 & "' 'fails due to invalid use of null
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Apr 17, 2014
how to return all values in a query when a form critieria is left blank. I have made some progress, the combo box criteria queries were fairly simple, but i'm getting stuck with my date criteria. My query doesn't return null values when I want it to.
I want it to return all records (including null values) if the form OpenFrom and OpenTo dates are blank, and just the values between the selected dates (excluding null values) if the form is completed.
Code:
SELECT qryReportSelector2_Authority.*, qryReportSelector2_Authority.ApplicationDate AS ApplicationDateFilter
FROM qryReportSelector2_Authority
WHERE (((qryReportSelector2_Authority.ApplicationDate) Between Nz([Forms]![frmReportSelector]![OpenFromDate],DMin("[ApplicationDate]","[qryAllCases]")) And Nz([Forms]![frmReportSelector]![OpenToDate],DMax("[ApplicationDate]","[qryAllCases]"))));
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Nov 16, 2014
I do not understand what is happening here. I have foll0wing line in a calculated query field:
m: Switch([EmpID]<5,1) ' run Query 18 in attached example, A2007/2010
this produces 1 for all EmpID<5 and Null for all other EmpID's. All as expected.
But if I do this:
m: Switch([EmpID]<5,1,[EmpID]>=5,Null) ' run Query 19 in attached example
then the entire column is set to Null
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Jul 5, 2013
It might be an easy one but I just wasted the past hour deciphering through my code in order to solve the run-time error '94' that I'm getting when trying to execute the following code:
Code:
Private Sub cmdUpdateDates_Click()
'###################################
'This sub aims at combining the timesheet date and the start and end time into the fields [Start Time] and [End Time].
'###################################
Dim intCounter As Integer
intCounter = 0
Dim rs As ADODB.Recordset
[Code] ....
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Apr 18, 2006
Hello all,
A bit of a weird one, I've got a query and the criteria for showing records is that one particular field is null. However the query is showing records with the values in the field chosen for the Is Null.
Not sure why this is happening, has anyone come across this problem before?
Thanks.
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May 12, 2014
Any way to have a form with Dates as column headers to update a table where the dates are stored in rows???
The table set up is like this:
tblOpHdr
DiaryID (PK) - OpDate (Date)
tblOpDetail
DiaryID (FK) - CostCode - MachineNumber - MachineHours - etc
I'm just wondering if there's any way I can do this with a datasheet or a crosstab type setup?
It's Access 2010.
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Aug 28, 2013
I have built a query to calculate the expiry dates of training courses but I am trying to input a criteria so that only dates within 90 days of todays date show. I am using Date()<90 but it doesn't return the correct information. What the criteria should be for this?
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Apr 3, 2008
I am having problems with setting up a set of combo boxes.
What I am trying to do is if combo Productline is empty then in combo PartNumber would show all products but if combo Productline has a value selected then in the combo partnumber would only be able to select the partnumbers in that productline.
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Nov 16, 2006
Hi, I have some problem with assigmnet with date and string variable. what i wana do is get data from Forms textboxes into variable and then by insert query send to history table.
the problem occurs when there is blank textbox its says invalid use of null.
e.g
myStringVariable = Forms!myform!EmpName
myDateVariable = Forms!myform!EmpDOB
this code is behind the update button which i press when ever i want to shift data to History table
so when the fields are empty the invalid use of null error arrise
any idea how to handle this null specially in date
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Apr 9, 2015
I have a table of records, which has within it two date fields (effectively, a 'start' and 'end' date for that particular record)
I now need to create a query to perform a calculation for each date between the 'start' date and the 'end' date
So the first step (as I see it anyway) is to try to create a query which will give me each date between the two reference dates, in the hope that I can then JOIN that onto another query to perform the necessary calculation for each of the returned dates.
Is there a way to do this?
So basically, if for a particular record, the 'start' date is 01-Apr-2015 and the 'end' date is 09-Apr-2015, can I produce a dataset of 9 records as follows :01-Apr-2015
02-Apr-2015
03-Apr-2015
04-Apr-2015
05-Apr-2015
06-Apr-2015
07-Apr-2015
08-Apr-2015
09-Apr-2015
(The *obvious* solution would be to create a separate table of dates, from which I could just SELECT DISTINCT <Date> Between #04/01/2015# And #04/09/2015# - but that seems like a dreadful waste of space, if that table is only required to generate the above? And it would have to cover all possible options; so it would either have to be massive, and contain every possible date - ever! - or maintained, adding new dates as necessary when they are required. Seems horribly inefficient!)
Is it possible to just select each date between the two reference dates? Or can you only query something which exists somewhere in a table?
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Sep 7, 2006
Hiya-
I have a database with 5000 entries, corresponding to about 10 entries for about 500 people. Each of the entries is dated, and I need to calculate the time intervals between each person's sequential entries in the table.
One way of doing this is to create another column that contains the date of the previous entry. I can then use DateDiff to subtract one date from the other and give me the difference in days.
This approach falls down if I then work with only a subset of the entries - I would have to re-enter the previous entry dates as the time intervals would have changed.
What I really need is a way of subtracting the date from the date in the cell directly above it. Will Access let me do this, or is there a better way?
Many thanks, Jules.
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Jul 8, 2014
I have two tables with dates. Between (!) every two following dates in table1, I want to know the number of dates in table2. How do I write an SQL query for this? The tables I have are up to a few hundred records in table 1 and a few thousand records in table2. So to prevent that this takes hours I need a fast query.
To explain the query I need, for example:
table1
01/01/2014
15/01/2014
17/01/2014
30/01/2014
table2
01/01/2014
02/01/2014
05/01/2014
17/01/2014
18/01/2014
20/01/2014
21/01/2014
25/01/2014
So the answer of the query would be 2,0,4.
Explanation:
Between 01/01/2014 and 15/01/2014 in table 1 there are 2 dates in table2 (01/01/2014 is not included between the dates)
Between 15/01/2014 and 17/01/2014 in table 1 there are 0 dates in table 2
Between 17/01/2014 and 30/01/2014 in table 1 there are 4 dates in table 2
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Nov 15, 2011
I have a master table which shows all transactions per record (person) over a financial year.
Each record person has a seperate package period over which their spend needs to be measured. Therefore although I have all their transactions for the year, I only want to sum their transactions between their given [start date] and [end date] which are in columns.
I need to be able to create a field which sums all expenditure per record between the start and end dates
Name Start Date End Date Invoice Date Amount
Matt 15/5/11 15/9/11 1/11/11 £100
Matt 15/5/11 15/9/11 7/7/11 £200
Matt 15/5/11 15/9/11 12/12/11 £200
In this case I would only want to sum 7/7/11 as this is between the start and end dates
I want to write something like sumif([Invoice Date] is between [start date] and [end date] - not sure where or how exactly
(The start date and end date will always be the same per person)
Is this possible in access?
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Nov 16, 2007
I think the title pretty much sums it up....
I have a query where data is first sorted by user input; first field's criteria: [fieldname], then by another field's criteria: Is Null.
I know there are records containing null values in the second field, as I have run a select query with the criteria: Like "*", to make sure they are null, and not zero-length-strings.
The query is refusing to return any results...
Any ideas?
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Nov 3, 2005
Hi,
Please bear with me here as it's a little involved.
I'm doing a staff profile website which includes a section where they can enter their annual/other leave details.
I decided to store their leave in two fields Start_Date | End_Date rather than each individual date that they took - the short and wide approach vs long and narrow.
This has left me needing to do a query that would return all the dates between the start and end dates inclusive.
Example:
StaffID---Start_Date---End_Date
---1-----12/12/2004--14/12/2004
Returns:
StaffID---Leave_Dates
--1-------12/12/2004
--1-------13/12/2004
--1-------14/12/2004
I appreciate i could do this using some script to loop through a recordset and build an array of dates but i wondered/hoped that it could be done using SQL.
As it is an asp page i can't use user defined functions in a VBA module in Access so the solution would need to be pure SQL.
Is this possible?
Any help v.much appreciated.
TS
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Apr 4, 2012
I have a scenario where the first three rows of date which have dates of 4/1, 4/4/ 4/6 with ndc 5513026701; next six rows that have dates from 4/8 to 4/20 with ndc 5513014801; next three rows that have dates from 4/25, 4/27, 4/29 with ndc 5513026701.
The issue I am having is I do not know how to have separate min/max dates for ndc 5513026701 since when I group by ndc 5513026701 min = 4/1 ; max = 4/29. I need to have min = 4/1 and max = 4/6 for one row and another row of min = 4/25 and max = 4/29.
Any easy way to sequentially create min/max for each ndc 5513026701? I wasn't sure how to verbalize this so I have attached a sample worksheet.....
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Aug 18, 2014
I'm not sure if I am biting off more than I can chew. I have a text field in each record in my database (Inherited) The db has nearly 5,000 records. I would like to split the field into records in a seperate table. An Example of the table as is now;
Code:
MemberIDBoats
5882Opossum(78-80) (87-89) Otter(80-84) Opportune(91-93) Turbulent(97-00).
5883Astute Auriga Aeneas Affray Amphion
2407H34 O10 Porpoise Trenchant Tapir.
I want to create a table as follows;
Code:
MemberIDBoatFromTo
5882Oppossum19781980
5882Oppossum19871989
5882Otter 19801984
5882Opportune19911993
5882Turbulent19972000
5883Astute
5883Auriga
5883Aeneas
5883Affray
5883Amphion
Etc.
Is this possible in one hit or do I need to process the records without dates first and then run another process to split those with Dates? I say dates but the field is a text field. About 15-20% of the records contain dates which are always enclosed in parenthesis.
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Jan 2, 2013
Is there a way in this program to create a list of dates between 2 dates?
i.e I have Arrival Date and Departure Date. Is there a function or expression that will list all the dates on and between?
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Mar 17, 2008
I have a client that wants to enter a range of dates in a query of when they will call that person back. Then they want to be able to type in a range of dates and have a make table query show them all the people that fall in between these two dates....is this even possible???
Ex.
Joe March 3 to March 8
Mary March 4 to March 9
John March 5 to March 10
So if they type into the query March 3 to March 6 all three people should show up because one of the dates specified lies within the parameters they are asking for.....man I am out of ideas
Anyone.....
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Jul 3, 2005
I have created a data base over the last few months I just kept adding information in the fields that I created but now have a problem I have the sections in a drop down menus of which access will let me ad info but when I com to save I get this message
"Index or primary key cannot contain a null value"
Access will not let me save any added info in any field I have tried all the ways that I know to get round this problem to no avail it is most properly some think silly but I am desperate now as I have worked hard on this project.
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