Maximum Number Of Fields In Table

Dec 27, 2006

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!

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Maximum Number Of Fields In A Table

Feb 8, 2008

Hello there.

Is it better to have many fields in one table or to split the data between a number of tables and link them?

Thanks.

# gingette

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Aug 17, 2007

I understand that the maximum file size for an Access db is 2GB but can you essentially have as many fields as you like as long as you do not exceed the 2GB threshold?

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Sep 18, 2006

Hi,

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.

Grateful for any advice! Thanks!

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May 4, 2005

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?

Pls help, your help will be highly appreciated.

Thanks,
Venkat.

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May 3, 2006

hi all,

This is general question only. How many number of records that Access can handle as a maximum records?
Or it only depend on size limit (4GB)???
thanks

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Jun 3, 2005

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.

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Nov 1, 2014

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Aug 21, 2007

hi there

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thanks

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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.

[Code] ....

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Dec 19, 2012

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Jul 12, 2007

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Sep 1, 2006

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Thanks in advance.

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Feb 11, 2008

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By the way i'm using access 2007

Thx for the explanation in advance.

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Jul 14, 2005

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Also, I need to know how to export a table into a text file, with a format without any spaces, and each record is divided with a new line. This an old IBM text format file.

Thanks, Torsan

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Jun 4, 2013

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Eg. Record 1 - [inv No] 1 [Vno] 0005
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I have a table that has fields for number input

On my form I have in a TAB form 3 fields to input a figure, in the table these are set up as a Text NOT a Number. If i set it as a Number it keeps rounding up? even after i enforce 2 decimal places it still keeps rounding up.

Field 1 - 42988.62
Field 2 - 0.00
Field 3 - -14330.84

I then created a unbound txtbox so I can add these up

=[ResBF]+[ResRefReC]+[ResSurDef]

what i get in return is this :- 42988.620.00-14330.84

I also tried =Sum([ResBF]+[ResRefReC]+[ResSurDef])

and that just comes up with #Error

I even tried in the table directly to have a calculated field and still having the same problems.

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Jan 21, 2005

Can anyone please tell me the maximum number of records a table can accomodate? Also what happens if the number of records exceeds this maximim value? Awaiting reply

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May 18, 2006

I have an ... interesting issue. I am wondering if others have dealt with this. I have a solution, but am not the happiest with it.

I basically have 2 databases here. (Or I will when I'm done making them) and one is dependent upon the other. In fact, the 2nd's tables are dependent upon the fields in the first database's table.

This database is for quality control checking purposes.

First off,

Database 1:
Basically a list of standardized audits and what needs to be checked for those audits. What needs to be checked can change as things progress, but stays pretty standard.

Database 2:
This will hold the checks that the QC branch will do, based on what type of Quality Check they are doing, they have an audit standard. This audit standard exists in database 1.

What basically ends up happening is that the data in Database1 become Table fields in database2.

Example:

Database1:
Radio Check Audit Standard.
Needs to check following:
Process Specs
EDMS Drawings
Manuals
SoP / Policy
Used Radio callback
Used radio during emergency
Etc.

Another Random Check Audit Standard
Needs to check the following
Process Specs
EDMS Drawings
Manuals
SoP / Policy
Did something specific for this Audit
Didn't do something else, also specific for this Audit.
Etc.

Continue on with other Audits.


Database2: Will keep track of all the quality checks that have been preformed.

Today we will check Radio Protocol
Did they:
Process Specs
EDMS Drawings
Manuals
SoP / Policy
Used Radio callback
Used radio during emergency
Etc.

Yes, No as necessary.

2 Days later, we need to do another QC on the Radio Protocol
Need to check if they did:
Process Specs
EDMS Drawings
Manuals
SoP / Policy
Used Radio callback
Used radio during emergency
Etc.


Etc.


But what will be checked for in Database2 depends on what the standard is for the "Radio Check Protocol," or etc.

Right now, i see 2 options:

Option1
Make the 2 databases, and when a user "Picks" the Radio Check protocol, a linked table is filled with the Name / object that needs to be checked with a field in the same row to hold the data if the object was done / not done etc.
The fields in Database1 are automatically put into this specific instance of Quality Check, etc.

Only problem with this: Requires coding to auto update. Easy to do, but if errors occur, things will screw up.

Option2:
When the user picks the Radio Check protocol, simply allow a subform with a refreshed drop down box. Allow user to pick items they need (Limit it to only this Audit list, etc) to set to true. Assume false for other items not specifically chosen by user.

Problem with this: If an Audit standard changes to remove an item, or add item. Any quality checks done will also change for the assumed false items. If another Item added in, then all old QCs will now also have that item added in / reported assumed false. And if it is deleted, all old QCs will loose the item that was reported false.


I'm seen the first option as the only viable one.

Am I missing this, is there some other way to do this that would be better / wiser? Etc?

Kelemit

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Jan 9, 2008

Hi all, I've searched this with no success.

I have a ODBC (Firebird) table linked using a DSN connection which has >300 fields. In Access, the linked table only show 256 fields (max for Access). Otherwise the link works fine. I have no control over the source Firebird table.

What I'd like to do is limit which fields from the Firebird table are shown in Access. I don't need all the fields, but I need some that are at the end and are not linked in the current setup.

I'm very much a novice at using ODBC, but can I somehow use SQL or some other method to specify which fields to show in the linked table?

Thanks for any suggestions,
John

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The "Application" table also has "StudentID", "First Name" and "Last Name" fields.

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