My issue:
Does anyone know the maximum number of (one to one) relationships with cascading deletes a table can have?
Background:
I have a split database peer-to-peer application with ten simultaneous users, 250+ linked tables running on A2K, AXP and A03. MSDE and SQL Server are presently not viable options.
I'm unable to manually or programmatically relate one table to 73 others with referential cascade deletes; some of the 73 are related to still other tables. The one table is used as a recordsource on a subform on each of 73 different main forms, each of the latter having a different recordsource.
In other words, I want to delete a record in any of 73 different main forms, each with a unique table recordsource, and then cascade delete a subform record (which has the same table recordsource, regardless of the main form).
If I combined the 73 into a single table, I'd have a monster record with 500+ fields, assuming the latter is even possible, and in which event perfomance would suffer from excessive network traffic.
What I've tried:
I haven't worked this issue for some time and have forgotten the number of relationships for a single table I've been able to create. As I recall, it's on the order of 20 relationships maximum for one table.
Of course, I can do it programmatically delete the subform record on the OnDelete event of the main form, but, for elegance, I'd like to use a cascade delete.
Peer-to-peer network performance is not presently a problem.
I'm trying to get the maximum number in a table field to increase it by one depending on the member that is selected in a drop down in a field.
I have three tables: members, programs and times. Each member can have N programs and each program can be broadcast N times.
Each member has a three digit code, like XXX. Each program has the three digit code of the member + three numbers that are supposed to auto increment. That is, the first program of member X with the member code XXX is called XXX001.
What I'm trying to do is that when a new program is filled in and I select the member, then the program code should update automatically, adding one to the latest program by that member.
That is, if the last program by member X that was inserted in the database is XXX010, then if a new program is inserted it should automatically be XXX011, even though programs by other members have been added in between.
This is the code I use now, for the AfterUpdate when selecting the member in a dropdown in the form. But although I've played around a bit, I just get error messages...
Private Sub medlemsruta_AfterUpdate() Dim medlemskod medlemskod = Me![medlemsruta].Column(2)
Dim strMax As String
strMax = DMax("programs_kod", "table_programs", "Left$(programs_kod, 3) = medlemskod") Me!program_kod = Left$(strMax, 3) & Format$(Val(Right$(strMax, 3)) + 1, "000") End Sub
Medlemsruta is a dropdown where one selects the member from the members table, where the three digit code is in the third column (Column(2)).
I'm trying to use DMax to get the maximum number for the particular member and after that adding 1 to that for the new program code.
Hi, we use access for localisation in our application. The business object which accessess the access uses DAO connectivity and we often land to "Too many client tasks" problem.
is it wise to change the DAO to ADO? if so the above problem will go off? what are the chances that the problem still persists?
is that access has any limits on the number of connections? like 64, 255? or is that ADO/DAO has any limitaions on the number of concurrent connections to access DB?
I have created a db for my warehouse, now what I want is to set a maximum no of items to be issued to one person = 20 (means 20 rows only) in a subform. If the number exceeds it prompt user that you reached to the maximum no of issues.
I have run into a problem with an ODBC table connection. The table I am connected to exceeds the number of fields allowed in an Access table. I am using Access 2003. When I looked on Microsoft help site I think the max number of fields in a recordset is 242 so I am unable to see all of the fields in the original table I am linking to. Does anyone know if this limitation has changed in the newest version of Access? I checked the Filemaker www site and that program does not have the same limitations. Thanks in advance for any help!
how many columns is the maximum in a query?, because i have one that has 26 columns , but i need some more... what can i do?? is there a way to add some empty columns to a query?? thanks
I have an Access database with a table that contains 11 fields. The first is a unique ID and the other 10 fields are various numbers. I need to know which of the 10 columns contains the highest number for each row and return the 2 rightmost characters of that column name. I started with the "maximum" function that I found on-line and it works to give me the maximum number in each row, but I need it modified to return the 2 rightmost characters of the column name that contains that number.
Code: Function Maximum(ParamArray FieldArray() As Variant) ' Declare the two local variables. Dim I As Integer Dim currentVal As Variant ' Set the variable currentVal equal to the array of values.
I am trying to create a training matrix in which i need a form that if I put or assign maximum of 20 attendees then 20 comboxes will appear in form.for example, i enter in textbox1 6 or 15 depends but max is 20 then if hit enter comboxes will appear but quantity will based on value that i enter in textbox1.
I want to build a Financial Database. We are provided a certain amount of budget under different heads each year. Every month we spend some money from some or all heads. Then we provide a detail of expenditure during the month under each head and the balance thereof. My request is how many tables I need in my database. My opinion is 5 tables each for Years, Months, Heads of Expenditure,Budget Allotted, and Expenditure.
Hi to all; I am not familiar with access function, in Excel its very easy to find the max value at row level, what's the formula in access query to get the max of this example Co1co2 co3….co60max(co1:co60) 200150300 500 ? 212542321 222 ? thanks in advance for respond Majed
I have an expression in a query which is checking a list box on a form. If the list box is empty (is null), then I would like the query to search on the highest (maximum) value in the specified field (CourseFK), otherwise it will look for the value in the list box.
Expr1: IIf([Forms]![frmEditDeleteStudentDetails]![lstEditCourseFK] Is Null,[CourseFK]=Max([CourseFK]),[CourseFK]=[Forms]![frmEditDeleteStudentDetails]![lstEditCourseFK])
However it seems Access will not allow me to do this - I get an error about an aggregate function in a where clause.
Can someone please suggest to me how to get around this? Eg, is there an alternative way to search for the maximum (still needs to be determined dependant on the list box).
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How do you find the maximum of four fields in each record of a query. Say (for example) you have daily records of the rainfall across four cities, where the cities are the fields in the query. how do you write an extra calculated field to the query that shows the max. rainfall across the fields on a paticular day.
I am a beginner and have a very basic query. I would like to create a field which returns the maximum value across a number of fields for each record. Is there a function that would do this?
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I am doing some planning for creating a database with ~90 fields and want to know before I start it whether it will be able to handle that many.
I would like to know if there is a maximum nb of columns to use in a table or at least a prefered max nb. For example i have a table "customers" and inside i have "name" "last name" "age" "gender"..and so on is there a limit? By the way i'm using access 2007
My quiery is supposed to search through a table of names, and find the latest timesheet entry date for each name, as follows:
ID: 1 Name: John Timesheetdate: 1/1/2005
ID is specific to each name.
I want the result to be a single row for each ID/name, and to return ONLY the latest timesheetdate (this could either be the maximum value or the latest entry).
I have a feeling that this is a simple problem, but i just dont have the knowledge to do it, any help would be greatly appreciated!
