Tables :: Unique Identifier Over Two Fields On A Table?
Jan 22, 2015
Any way on a table that I can have a unique identifier over two fields? E.g.I have a login ID and a Domain field in a table with sample data below.
Login Domain
John Test
Jane Test
Fred Live
John Live
The login names need to be unique to the domain so the integrity cannot be breached. This has to fit into one table (although the domain is actually being pulled from a look up table so is in fact a numerical value) for ease of form creation.
I'm currently in the process of doing a an overhaul of the database including a table, some odd 17,500 records long.
What I need to do is to create a unique identifier from the existing part number, almost like an autonumber, but it only increments when there are duplicates. What I mean is that there would be for example, there would be five records of say, part 000135.
What I'm trying to get at is, how I would have to code to grab the existing part numbers (all formatted to be 6 digits), add an extra 2 digits to be its unique identifier, and then save it all to a Unique Identifier column, that I created.
An example of what I want is say, I have part numbers 000135 and 000136. The numbers would go up from 000135-01, 000135-02, 000135-03, 000136-01, 000136-02.... The dash is not as important as implementing the 2 digit unique identifier.
To 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.
I wonder if someone can help with what must be an easy solution to this problem.
I have a table with 350,000 records, but without a unique identifier field. I just want a simple incrementing number field to become the primary key but dont know how to add this in. I cannot add an autonumber as there are two many records - it falls over.
Ive tried exporting it all to excel, but as well as being cumbersome, something went wrong and so I'm back to square one.
I think there must be a way to add an incrementing number either via a query or in VBA but I dont know how. Please can somebody provide a solution.
Have a table with data in it and I want to add a new field to uniquely identify each record (simple numerical sequence like 1, 2, 3, 4.....). I don't know VBA and don't know SQL.
Tried opening the table in design view, adding a new field with "autonumber" as the data type but get the following error msg: "File sharing lock count exceeded. Increase MaxLocksPerFile registry entry". The table has about 750,000 records in it.
I'm looking into create a small unique identifier to put on top of each invoice generated by the database. (.MDB A2010)where '000' its just 3 zeros added for extra badassery, '1' is the actual ID from the database table and -2014 its the current year when the record was added...So maybe I have info from 2 fields (ID, YEAR)... but How do I add the ceros to the ID field... so its 0001 not 1 or 0135 not 135... ???.
I have a database in Excel that contains farmers who can be identified by a Unique identifier: MZ-01-0001. The registration details for these farmers are not always up to date. Now when I try to append the data for the farmer with MZ-01-0001; with the primary key set on the Unique identifier, Access does not want to do it since there is already a record in the system. When I remove the primary key it doubles the record, which is also not what I want. So I am wondering what I need to do to append the record while keeping the primary key intact.
I have a large table with information about different cars, called "Car Metadata". In this, each car has a unique identifier ("Car Code"), the make ("Manufacturer Name") and the model ("Short Model").
What I want to do is create a form with dropdown menus.I have a first combo box with all the makes in the Metadata table.
What I am having trouble with is that I want a second combo box underneath which would only show the models which correspond to the make selected in the first box.E.g. someone could select Ford in the top box and the second box would only show Fiesta, Focus etc.
Once it has done that I want it to be able to write the Car Codes for the records which match up to the make & model selected to a new table. Just to complicate things further, there can be multiple records with the same make and model but different Codes, I want all these multiple codes to be written to the final table.
So i have a access database with a main field that we can call vendor # (LIFNR) and another called Company code (BUKRS). There are multiple company codes under a single vendor #. Example:
LIFNR BUKRS
0000010535 1010
0000010535 5060
0000010535 5610
0000010536 1010
0000010536 5060
0000010536 5610
What I am trying to do is create a 3rd column where i can have a unique row for each of these fields without it repeating. There is no unique identifier in this table and that is what i am trying to achieve.
How i would best combine values in a table to produce a 'primary key id number.'
For example: the first letter of a city in the ID and the next number available/auto number - Portsmouth -> P233
I know i can create this in a query however i want it as the unique ID for that record entry in a table. If that doesn't make sense i can try to elaborate some more.
I am undertaking an analysis of corporate mobile phone data based on data from the phone provider. The base data consists of a number of monthly text files at transaction level for voice calls, data usage, billing/tariff information, international calls/transfers etc. I have set up VBA code to import the text file data into a number of Access tables.I would like to have a way of joining these tables but the only common field is the phone number (a text field with the groups of numbers separated by hyphens).
I confirmed that joining the tables on the phone number text field does not work.My idea was to create an additional table with just one row for each phone number and link that to the other tables by the ID in the new table. I was able to create this table [PhoneNumbers] (by creating a totals query of the phone numbers from the main call transactions table, I then dumped it into Excel and then imported it into a new Access table with an auto-generated ID column).My problem / challenge is how to get the ID column from my [PhoneNumbers] table to appear in each of the other tables so that I can join them effectively. In the Excel-world, I would have used a vlookup function.I even thought of performing this as an interim step in Excel but there are too many records / rows in some of my tables. It seems that the dlookup function is not what Im looking for and even if the IIF function is suitable, I cannot get the syntax to work for me.
1. I have a database (see attached) with three tables all of them with the same fields. The first three are numbers (InCo_No, Proto_No, Year_No). Each of these fields (numbers) can be the same in the other table(eg. Year_No), but the combination of the three cannot be.
How can I prevent the entry of a duplicate combination of these three fields?
2. I want to have a form to fill the three tables separately, depending the values in the other fields.
I have create 6 tables for library books (which are differentiated by categories). Each table has different category and unique ID name e.g. F1, F2, F3..(for table 1), G1, G2, G3..(for table 2) and so on. How do I combine all those tables into 1 table for easy search for a book rather than open up each table? Tried append query but its ID run as 1, 2, 3... , not F1, F2, F3 and it only append 1 table, not the rest.
How to get this one to display in a single column.
I know how to do this wiht VBA. But, this output will need to reside on a SQL Server View. So I need a SQL language solution. If it can work in MS Access Query, it won't be too difficult to test then translate to SQL Server.
Customer Table with PK Customer_ID.
There are two tables with FK Customer_ID.
1. Table Lease1 - Has 3 Fields - the form code enforces No Fields -or All Fields. The red * indicate a Required field - These 3 are entered together.
2. Table Lease2 - Has 1 field with 0 to Many records.
Goal:
The Type shows up in a single column.
Each Type shows where the data comes from (Lease Type, Surface Owner, Mineral Owner, or Hz Lease Type)
Challenge:
Lease1 table has 3 fields that need to be transformed into a single column.
Lease2 table has 1 field to be appended to the single table.
Then, there is the column that identifies where the data came from based on the column name.
I 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"
I have two tables of data, each relating to three business branches (branches A, B and C).
Table 1 shows the expenditure of each branch (by fuel, premises and wages).
Table 2 shows a number of units for each branch (mileage, floorspace and sales).
What I would like to do is calculate unit costs, based on the expenditure in Table 1, divided by a relevant unit in Table 2. The catch is that I want to have a third table which allows the user to specify which expenditure (from Table 1) is combined with which unit (from Table 2) to generate the calculated unit costs. I've been able to do this in Excel, and have attached an example. I've also attached an incomplete Access version with the first two tables. Given the complexity of my actual data, I feel this could be better handled in Access than Excel.
I'm working on a database that has to be done in Access and in coming up with a unique ID for each worker I want to take the first letter of the first and last name and the last 4 digits of their social to create the UID for the table. So for FIRST_NAME:Homer LAST_NAME:Simpson with SOCIAL:123-45-6789 his UID would be HS6789. Is there a function within Access that would allow me to do that, or is that something that's just too advanced?
I am working on a database of biological samples and test data. A problem is that many times the same subject has multiple ID's. For example, one subject may have the ID "ID234" but they previously had the ID "Sub84" or something like that. I want to be able to have 3 or 4 fields that have ID's for a subject, and I don't want a single one of them to be repeated. So I have column a, b, c, and d, and I don't want to have one record to have the same ID in column a as another record has in column d and so on. All I have been seeing is a way to make sure all of a, b, c, and d are unique combinations, but I want none of the fields to be repeated.
I have a table "Product" and in this table I have two fields "StoragePlaceID1" and "StoragePlaceID2". Both these fields link to the look-up table "StoragePlace"
*Attached Image "Product_StoragePlace" from the Access Relationship Window"*
When I want to add a new Product from my inter face i get the error you can see in the Attached Image "Save_Error".I think the problem is that the Relationship is defined as One-to-Many,there a way to define the relationship as Zero-to-Many.
I have a large query that has information from accounts sorted by date, account repeat but they are always associated with a different date. I'd like to create a report where each date has it's own column with an associated field displayed as the information in the column. However, as data is added to the table I'd prefer to do it without having to make a query to filter each date each time information is added.
The information is added in bulk with all the same dates, so ALL accounts (excluding newly opened accounts that may have no information with a certain date) should have information for each date - there will not be single accounts with their own date. For example: An account numbered 12345 with data of 57% on 1/2/13, 63% on 6/2/13, and 89% on 12/2/13. I'd like each of the dates to have their own column, with the account numbers as the row and the percent data to show under the date they are associated with. how to manage this in a report, or if it is possible.
I have this basic question (obviously not so basic for me): how to pull out only unique records from two fields.
More details - two fields with names of competitors in a tournament (Winner or Loser) and i need to build a query to have all players names participating in the tournament regardless if they have won or lost in one list.
So what is the best way to ensure the third entry is fine as whilst ready salted already exists it doesnt exist for doritos but the fourth entry would pull up a msgbox refusing the entry as it is a repeat of entry one.
