Tables :: Index On Autonumber Key Column
May 31, 2013Why one would want a unique index on an ID key ? It can't be effectively used in joins and is never used in a where clause. So why have one ?
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Tables :: How To Recreate AutoNumber Column With Values Assigned
Nov 19, 2013I am using a form based on a table in MS Access 2010 for data entry.
The Data Type for column ID is AutoNumber with Increment=1. When I found ID for recent entries gets an anomaly (e.g. should be ... 3, 4, 5 ..., but it shows ... 3, 5, 6 ... that misses 4), I tried to refresh/change the ID column with the following steps:
1). Change the Data Type for column ID from AutoNumber to Number
2). Add a new column IDD and set its Data Type as AutoNumber
3). Delete the original column ID
4). Change column name IDD into column name ID
However, I got a problem with step 2): here the order # for the records becomes messed up, e.g.
Should be:
ID IDD
1 1
2 2
3 3
5 4
6 5
7 6
... ...
But, I got:
ID IDD
1 3
2 4
3 5
5 1
6 2
7 6
... ...
Why? Is this caused by the relationships between this table and other tables?
Tables :: ODBC Imported Tables / How To Ensure Index Is Created
May 13, 2015I am currently using Microsoft Access 2010 32bit, and have one database acting as parent, with a second linked database as a client for people to work with, and the parent database has tables imported from Sage V21 via ODBC. I have used the following code as specified in other examples as follows:
Code:
DoCmd.TransferDatabase acImport, "ODBC Database", "ODBC;DSN=MyDNSMachineName;UID=MyUID;PWD=MyPassword;LANGUAGE=us_english;" & "DATABASE=pubs", acTable, "INVOICE", "INVOICE"
one of the tables has 10k records in it, it only transfers 77 records. After manually attempting an import via the ODBC wizard it finally lets me access all 10k records.I wish to have a single button click delete and import fresh tables without worrying if all the data is coming across.Also, when manually adding a table, I am usually asked by the wizard to specify an index, but with the code above, I am not offered that option and the tables come across with no index. I am led to believe that having tables that link to each other without an index is bad, so how do I ensure an index is created?
Autonumber + Column Value
Apr 25, 2005Hi,
I am trying to create a primary key attribute which uses autonumber but takes its first 5 characters from another attribute in the same table and then assigns an incemental autonumber after it.
For example:
CompanyName+Autonumber
Strawberrysoup + 001 = Straw001
Does anyone have any ideas - this would be greatly appreciated.
Thanks.
Add New Autonumber Column To Table
Oct 19, 2006How do I add a new column to an existing table, and fill it with number (starting at 1) so I can use that column as the PK? Step-by-step instructions would be great, I'm having a lot of trouble with this!
View 4 Replies View RelatedAutonumber Column Not In Sequence
Aug 15, 2007Hi,
Its good to be back after a long time. Hope everyones fine.
I have a query and would appreciate any help.
I have a master-table (tblM) and two related tables (tbl1, tbl2) with one-to-one relation.
Relation1 : tblM.ID (autonumber) related to tbl1.caseID (number;LongInteger)
Relation2 : tblM.ID (autonumber) related to tbl2.caseID (number;LongInteger)
Relations are cascaded (referential integrity imposed).
I import data from excel and feed fields of tblM (I dont feed ID field from excel as it generates autonumber). At a time I feed 150 records (daily).
I have a front-end based on query from three underlying tables. Data-entry-operators do not work on tblM data as it is readonly in the front-end. They enter data in the tbl1 and tbl2 columns.
I noticed as they start entering data in tbl1 columns, the tbl1.caseID column gets data from tblM.ID on its own. Same happens in the case of tbl2.
My observation is :
I find that tblM.ID is not equal to the number of records available in tblM. (ie tblM.ID is more/less than number of records in the table. So the tblM.ID generated is not in serial.
Next time as I start importing data from excel file to tblM it gives me error and not allowing further import.
Any help!
Thanks and regards,
Prodigy.
Autonumber Column In A Query
Sep 23, 2004Is there a way to add a column in a query with an autonamber
function ? What I need to achieve, is to assign a unique number to
identify each row of the query.
Using AutoNumber Primary Key On Sorted Column
Mar 4, 2013I've just begun using microsoft access and would like to create a primary key on a table of data that has been sorted alphabetically. However, when I try to create this key (designview -> auto number-> increment) it autonumbers for the column the way it was before i sorted it. Is there a known way of doing this?
View 7 Replies View RelatedTables :: Index And Relationships In (Sub) Table?
Aug 30, 2013I have tbl_orders which records orders. I have a linked table called tbl_order_lines which details the items against each order.
In a nutshell, an item can only appear once in an order. However, I do not know how to create a relationship or code the frm_order in order to reflect this in my DB.
Tables :: Index For Table With Single Field
Sep 24, 2014I have a couple of tables which only have a single field. Is it worth adding a second field in order to hold an ID number (is this commonly termed an index number?) for each entry.
My other tables with multiple fields include a field for an ID number and these tables are linked via these fields.
At this stage I cannot see any reason why, in the future, I would want to add additional fields to the tables which I am currently planning to make single field.
Tables :: Unique Record Entry - Index Or Primary Key Cannot Contain A Null Value
Dec 6, 2012I am building a database to capture monthly statistics on a number of items. I want to ensure that users don't enter statistics for the same item for the same reporting period. I found the following instruction, but can't make it work:
It suggests that I create multiple primary keys in the table
When I do it, it comes back with an error: Index or primary key cannot contain a null value.
Tables :: Empty Date Field - Using As Unique Identifier In Index?
Mar 5, 2013To prevent duplicate records, I use multiple fields indexes, which worked fine until now. I learned that each "empty" fields are consider unique by Access, so not the best in an index to prevent duplicate records. I managed to have it worked using the default value property to give each "empty" records the same value.
Now my problem is that I have a date field which is optional, but I need to use it as a unique identifier in an index. I could again use a default value, but since it has to be a date, I find it confusing. I would rather have a default value of "No date specified" or "-" or even better, "". Unfortunately none of those works with date fields.
Tables :: Error - No Unique Index Found For Referenced Field Of Primary Table
Oct 8, 2013I am trying to create a one-to-many relationship between these two tables. I want to be able to access the 3 fields on the [Processors] table within reports based on [AllItems]. [AllItems] is a listing of account activity where the [AccountNumber] repeats. I have every field set as the "Primary Key" on [AllItems] as that is the only way to avoid importing duplicate data. I am getting the error: "no unique index found for the referenced field of the primary table"
View 3 Replies View RelatedAutonumber Linked Tables
Oct 12, 2007I have a MAIN table with autonumbering for the project number. In a table related to the MAIN table I have a project number that I want to be updated when the MAIN table has a new project entered. Can I keep these in sinc automatically?
View 8 Replies View RelatedAutonumber-primary Key Across 2 Tables
Feb 1, 2008Hi,
I need to create a table with 2 sets of different information both referring to job types. the problem is that i need the autonumber which created the job number to scale together. so both tables have a primary key of "job number" and i want the autonumber to only ever use 1 number in both tables.
e.g.
job type 1 - autonumbers - 1,2,3,4,6,7,9,10
job type 2 - autonumbers - 5,8,11,12
is there anyway of achieving this?
Any help greatly appreciated
My Main Tables AutoNumber Playing Up.
Jan 5, 2007OK, My main table has an autonumber field in it to make records unique.
At the moment, the number 5-34 are all in use on active records. But when I create a new record either in the front end form, or the back end directly in the table, it attempts to start the record off with an already existing number.
No idea why this is doing this at all.
Is it possible to reset the autonumber to say 50 so all new records start at 50, then 51 etc.
I really dont want to lose the numbers already assigned, as there are other tables that rely on that autonumber as the clients ID to record all the other data.
Its probably something very simple, but I cant carry on with my data entry at the moment.
Linking Tables Using AutoNumber Primary Key
Mar 13, 2006I have three tables.
EAch has a field called ID that is an Autonumber that is the primary key.
When I enter data via a form each record has a different ID across the three tables.
Does this mean they are not linking up correctly?
I have attached my databaset if that helps.
Thanks.
Tables :: Autonumber Counter That Starts From 1 Each Day
Nov 11, 2014I made a simple access project and I want to make a count for my visits, this counter MUST starts from one each morning "every new day", I use autonumber field to give each visit its unique code, I'm ok with that, but i need additional counter that resets each new day,, i watched some videos for making the autonumber starts from different number like 1000 for example using Append query but i didn't figure out how to use this method for resetting counter everyday.
View 6 Replies View RelatedTables :: Add Autonumber After Entering Records
Aug 20, 2013A slight flaw in the design requires this change. What is the best way to do it?
View 8 Replies View RelatedTables :: Creating ID With Text And Autonumber
Dec 1, 2014My database exports data to one of our customers who then inputs the data into their system.
One field i have is "RO Number" which i have as an autonumber which works for the purposes of my part of the system.
However they have it set as "RO9999", (Their system has been set up for years, we are a new "branch") but they aren't in access.
They want the RO number to be a running serial from RO30000, RO30001 etc
The data in entered on a form.
Tables :: Autonumber Sorting Out In Order
Sep 2, 2013I am creating a database for cases. I want to set autonumber into sequence, Let say if there are data numbering 1,2,3,4,5. If I delete no.2, The data will rearrange in oreder from 1,2,3,4. While If I add a new value it would be the no.5.
Instead of data value autonumber 1,2,3,4,5 as I deleted no.2 and add new records. The data has become 1,3,4,5,6.
Tables :: Autofill Additional Fields From AutoNumber
Jul 8, 2014I'm creating a database for a travel agency. There are 2 tables, one for customers and one for their bookings. I have established a relationship between the tables so the AutoNumber for customer ID links to a field on the add booking table.
In practice though, it would be easier to enter the customer NAME into the booking table and have it retrieve their ID that way to link them. This seems like I am missing something simple but can't fathom a way to do it.
The other factor is obviously more than one customer will have the same name so I may need to link first name as well to differentiate?
Tables :: Standard Length On Random Autonumber
May 30, 2014I need to restrict the random autonumber feature to 10 digits and a positive number for a primary key. I work in the medical field, and HIPAA privacy regulations require the use of random ID numbers to identify records. Also, I need the numbers to be positive numbers because we will be using barcode scanning equipment and the possibility of truncating the negative identifier creates the possibility (admittedly remote) of having a duplicate PK barcodes. I understand that we cannot change the Access feature, but any VBA code to generate a truly random 10 digit positive number I can use as a PK?
View 4 Replies View RelatedTables :: Autonumber / Customer Reference Field?
Sep 30, 2014use an account reference from one field in a table on a second table and add a number after it... e.g.
Table 1 Table 2
PEFA PEFA/001
PEFA PEFA/002
PEFA PEFA/003
PEFA PEFA/004
and so on...
Tables :: Autonumber Order In Existing Table
Jul 9, 2015I was adding an autonumber field to an existing table and I assumed the numbering would follow the order of the primary key but that doesn't seem to be the case.
View 9 Replies View RelatedTables :: Lookups Displaying AutoNumber Instead Of Field Name
Oct 21, 2012I have 3 tables: [SurveyVendor], [Surveys] and [SurveyResults]
SurveyVendor has 2 fields:
[VendorID] - PK
[VendorName]
Surveys has 3 fields:
[SurveyID] - PK
[VendorName] - FK
[SurveyName]
SurveyResults has 3 fields:
[SurveyResultID] - PK
[SurveyName] - FK
[SurveyQuantity]
I used the LookUp wizard to establish the relationships, and I chose to include 3 fields when linking [SurveyResults].[SurveyName] to [Surveys].[SurveyID]. I'd like the ID, Survey Name and Vendor Name to be displayed when making a choice in the combo box. And I would like the column to only display the SurveyName.
However, what's happening is the VendorID shows up instead of the VendorName when I click the combo box for [SurveyName]. And the SurveyID shows up in the column results, rather than the Survey Name.