Sql - MS-Access: TableAdapter UpdateCommand For Table Without Primary Key?
Mar 15, 2010
What's the syntax for an Update query for a table without a primary key?Disclaimer: Frustratingly, adding a primary key is not an option. My program is a small program in a much larger system with poor data management. My development time does not include rewriting the other software.
Note: The database is Microsoft Access.
Note: Similar to: Excel: TableAdapter UpdateCommand for table without primary key
UPDATE: Am I correct in saying, "If the table in the database has no explicit primary key, then there can be no valid TableAdapter UpdateCommand?"
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Dec 15, 2011
I have a table in Access with two key fields (let's call them Item and Cust). These key fields *combined* are the primary key. So each record must have a unique Item and User combination. It can have a duplicate Item with other records, and a duplicate Cust with other records, but not a duplicate of both. Because my "primary key" is a combination of two fields, I can't make a primary key on the table in Access (it only supports one field as a primary key).
I have another table in SQLServer which also has Item and Cust, but in addition, is has several descriptive fields that give more details about the Item and Cust. I'm trying to use ADO.NET to bring in that SQL Server table and UPDATE some matching fields in Access with the descriptive fields. [Code]
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Nov 13, 2009
I have a project which contains a large number of lookup tables, and I have all of these lookup tables represented in a single typed DataSet, which contains TableAdapters for each lookup. I've designed an editor for these lookup tables, which should allow editing of one of these at a time. My front-end is written in VB and WinForms, the back-end is a SOAP web service; I can successfully pass the changes to the DataSet back to the web service, but can't find a way to use a TableAdapter to update the single table that has been changed.
What I'm trying to do is instantiate the appropriate TableAdapter for the updated DataTable by sending the name of the table back to the web service along with the DataSet, then referring to the TableAdapter with a dynamic name. The normal way to instantiate a TableAdapter is this:
Dim ta As New dsLookupsTableAdapters.tlkpMyTableTableAdapter
What I'd like to do is this, but of course it doesn't work:
strTableName = "tlkpMyTable"
Dim ta As New dsLookupsTableAdapters(strTableName & "TableAdapter")
Is there any way to achieve this, or am I taking the wrong approach altogether? My other alternative is to write separate code for each table, which I'd prefer to avoid!
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Nov 2, 2009
ive been learning Vb.net at uni. Ive never used it before and im finding it a little difficult ( supposed to be easy )i usually code in c++ and MFC Problem I have craeted the database and added all the fields to the form.
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Aug 24, 2011
I have a View that i am trying to use to fill a TableAdapter with. In my code i fill the table adapter properly the first time, filter my bindingsource and use datarowviews to loop through the rows of data and perform the updates needed (done by a stored procedure). Now the problem is, after these updates take place, i need to fill the tableadapter again so that it reflects these changes. Sometimes the View i am using will have no results, other times it may.[code]This is the exact Error "Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding."Okay, you'll notice that i fill my view, then filter those results on the column Number equal to 1. I loop through all those results and update the table my view is created off of. After exiting the loop i hit the second .fill which times out after about 20 seconds. After testing, this time out only seems to occur when MyView does not hold any records.
I use Visual Studio 2010 and sqlserver 2008. All work is done in VB.NET. Also, during debugging, i paused on the second fill, went to Toad for Data Analysts and ran a SELECT * FROM MyView which did not time out and returned the empty result table in about 19 seconds. I have also tried doing a dispose on the tableadapter before the second fill but it has a similar time out. Sorry if this answer seems obvious or something, i'm only an Intern and am still learning the language. That seems to have done the trick, from my understanding that lets it run until it finishes (SQLServer will shut it down if the connection stays open longer than it allows). The ta.fill runs at about the same pace as Toad coming in around 19-20 second mark and does not error after multiple tests.
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May 8, 2012
After days of labouring, debugging and researching, im on the 3rd to last line and im stuck. This isnt the full code, but the relevant parts.
Dim dbProvider As String
Dim dbSource As String
Dim con As New OleDb.OleDbConnection
[Code].....
I understand this means my table doesnt have a primary key, but i have set one.
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Oct 24, 2009
I would like to have some explaination about the characteristics of a primary key in the table of such database. This is for vb 2008 express edition,since im new to this language,if this is true, as far as i understand about the characteristic in setting the primary key on each field for true.My question is if you are doing an updates/edit records in your table using the DataContext,if you setup the primary key for true of one of your field in the table it would edit all records in one datarow but if you put the primary key for true in all fields except one of them,all the records in the data column of that field which primary key is false could be edited.Basically its impossible to edit all records in the datarow and all the records in the datacolumn of the table in such one event. Is there any further explaination about the characteristics of primary key in the table?
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Aug 3, 2009
I have an access database with 4 tables and two of the tables have absolutely no need for a unique field that would be a primary key. One will only have one record and the other is a detail table for two master tables. I of course get an error like "UpdateCommand is not supported against a SelectCommand that does not return any key column information." when I try to save. Do I have to just create a primary field key I don't need or is there a work around for this?
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Oct 18, 2011
I've got a TableAdapter that could point to one of 2 tables (Live vs Dev) - right now, i'm manually going in and changing the table names when before i publish the project, but it's annoying, to say the least.Is there a way to set the table as a variable / parameter?Basically, I'm looking for the equivalent of:
SELECT @hTable1.*, @hTable2.*
FROM @hTable1
LEFT JOIN @hTable2 ON (@hTable1.PO_ID = @hTable1.PO_ID)
[code].....
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Mar 17, 2011
[Code]....
It is returning all the columns by id. I need only the primary key. When I add the following line it is empty: WHERE SIK.indid = 1 Why is that? Is there other ways to do the same thing and working? Since I am in the rush
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Jun 10, 2011
I'm having some problems trying to input records into a relational database. The design is really simple but I'm running into a wall when it comes to having the foreign key from my child table autopopulate the primary key from the parent table. I've made the connections in Access and from what I understood, so long as I committed a transaction, the child table would populate the primary key from the parent table. This is not happening.
my question is: is there a method that would do what I'm looking for? or am I cornered into using @@IDENTITY and manually inserting the primary key into the child table?
I've tried using datasets and data adapters and created a datarelation within the dataset, but it is still not doing what I need. everything I've tried thus far has allowed me to insert records into multiple tables, but won't relate them because of the missing primary key in the child table.
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Jun 8, 2011
So I have a program that I am converting to .NET FW 3.5 and I am getting the titled exception on the following line:If IsNothing(dsTopPI.Rows.Find(profile.Item("GEMSID"))) Then Continue For
which is in a for each loop. The thing is, I have set the primary key and when I put in the following code:Dim columns() = DSTop30Profiles1.DTtop30profiles.PrimaryKey Console.WriteLine("Column count: " & columns.Length.ToString)For a = 0 To columns.GetUpperBound(0)Console.WriteLine(columns(a).ColumnName & " - " & columns(a).DataType.ToString)Next
I get this in the output:Column count: 1 GEMSID - System.Int32
That would seem to indicate that there is in fact a primary key, right?
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Aug 23, 2010
Storage Unit application, 5 buildings, 107 Units split between the 5 buildings.frmBuildings is a form with:(from the botton up) 1 TLP 5 columns 2 rows5 Group Boxes, 1 per column, Group Box 1 & 2 each have a TLP with 2 columns & 3 rows. 107 buttons on the form that represent each building.The idea is that I want to change the BackColor of any button that represents an Available unit. This is a multi tier applaicationData Access Layer query function:
' Method name: getStorageUnitsAvailable
' Purpose: to return a Data Table from data base
' Parameters: none
[code].....
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Oct 24, 2009
I would like to have some explaination about the characteristics of a primary key in the table of such database.This is for vb 2008 express edition,since im new to this language,if this is true, as far as i understand about the characteristic in setting the primary key on each field for true.My question is if you are doing an updates/edit records in your table using the DataContext,if you setup the primary key for true of one of your field in the table it would edit all records in one datarow but if you put the primary key for true in all fields except one of them,all the records in the data column of that field which primary key is false could be edited.Basically its impossible to edit all records in the datarow and all the records in the datacolumn of the table in such one event.Is there any further explanation about the characteristics of primary key in the table?
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Jan 18, 2010
How would i get the primary key id number from a Table WITHOUT making a second trip to the database in LINQ To SQL?
right now, i submit the data to a table, and make another trip to figure out what id was assigned to the new field (in an auto increment id field). I want to do this in LINQ To SQL and not in Raw SQL (I no longer use Raw SQL).
also, seond part of my question is: i am always careful to know the id of a user thats online because i'd rather call their information in various tables using their id as opposed to using a guid or a username, which are all long strings... i do this because i think that SQL Server doing a numeric compare is much (tentative use of the word 'much') more efficient than doing a username (string) or even a guid (very long string) compare.
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Mar 7, 2009
I hope someone can help me. I have an ATM machine connected to a server. A form takes a textBox entry as a PIN number and matches it to a card number in the same table which is the primary key. The card number is in a comboBox.Selected Item. I have used a dataset to fill the comboBox as the form loads. I have tried for days and got nowhere.
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Mar 8, 2010
Ok i have 3 tables in a dataset
Table1 contains items for sale (referenced)
Table2 contains Stores (Parent)
Table3 Contains items in a particular store (Child)
the problem is the data in this case. Table 2 contains a StoreId field as a primary key. Table1 Contains an ItemId field. My problem is in table 3 this contains 3 fields, StoreId, Name and Quantity.
Now my Table1 contains a field called Name and one called PluralName, I need to determine which field in table one relates to the Name field in table3.
The following 2 constraints exist currently in my app
Table2 - StoreId (one) to Table3 - StoreId (many)
Table1 - Name (one) to Table3 - Name (one)
can i add another constraint :- Table1 - PluralName (one) to Table3 - Name (one) ???
I am presuming if i do i will get a constraint error as the property does not relate on a one to one level if the store has more than one item in stock and vice versa when it has only one in stock.
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Aug 9, 2011
I am trying to append multiple rows in a SQL Server.I have connected to the MS SQL Server and with a DataAdapter, I have downloaded the Table into a DataTable and displayed it in DataGridView.I now want to programatically enter multiple rows into the DataTable and later to update the SQL Table.
I am trying to build an application to do this generically.The problem I have is that the Table and DataTable has an 'ID' Field. In the SQL DB, i is an Auto-incrementing field.When the code loops through creating new rows and entering field values, how do I handle the ID Field that is the Primary Key?
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Apr 19, 2008
I included a MicrosoftReportViewer to my project:
Code:
Private Sub Report_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[code].....
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Jan 10, 2011
I am a veteran programmer . However , I am new to visual basic 2010 . I am trying to create a database that ould store data within an access file *.mdb .I have created the database which includes multiple tables . moreover i have created app.config file using wizard and my database along with dataset appear in the visual basic 2010 project . moreover when i test the function insert in the dataset the function performs well and the output is correct and i can see the new row added in my access database . however when i try to use the ATLtableadapter.insertquery (ATL is a datatable in my database) function in my form (in view code) the row doesn't get added.
When i first used this function an exception occured was something like first system class exception data.dll something along that lines. . however , when i created a new oledb.oledbconnection and put its connection string as the one in windowsapplication1.my.settings.marketconnectionstring. and used the open comand to open a connection . the message stoppped appearing . however , the insertquery is not adding the row in my database still when i use it in the form.
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Jul 20, 2009
I am using a number of tables on my application and two of which have a foreign key constraint I have set between them. When I change the account number on the main table via a combo box all of the relevant information for that table on the form is updated accordingly. However, the child table which has a foreign key reference to the Account Number of the main table is not updated when the acocunt number is changed. I have set the update to cascade in the references but still am having issues.
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May 26, 2011
I defined a database using SQL Server 2008 R2 Express, and connected to it using Visual Basic 2010 Express. For some reason though, when I use the database in the program, it wants to start off using a negative primary key.Is there any way to make the primary key only a positive number?
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Mar 24, 2009
I'm an experienced Office & VBA programmer, I am new to .NET programming. I'm in the process of migrating an Access 2007 database application from Access to Visual Studio Visual Basic project for further development. In particular, I am interested in using .NET controls to display data in a user-friendly hierarchical grid control.The data for each hierarchical display is stored in two separate tables (I call them tblData and tblExtraInfo), and then I use a query to join the data and prepare for display (I call the query qryBOM).
[Code]...
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Apr 12, 2009
I use this save code which is generated when I drog and drop table from data source to form[code]...
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Nov 20, 2011
I was working through Beth Massi's article, "Using TableAdapters to Insert Related Data into an MS Access Database" here: http:blogs.msdn.co...s-database.aspx
And I configured the TableAdapter exactly as shown by Beth, yet I am getting an error here:
Me.OrderDetailsTableAdapter.Update(newOrderDetailsRow) The Error says: "You must enter a value in the 'OrderDetails.CustomerID' field."
I am using this code for inserting a related record:
Namespace MyDataSetTableAdapters
Public Class AccessIDHelper
'<summary>
[Code].....
I am not able to insert and move on as I am getting the error marked above.
What could be possibly wrong with the above code and why is this giving an error ?
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Oct 11, 2009
I have a table with a multiple columns (two) primary key. I get an error on tableadapter.Update .How can I resolve that??
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Mar 15, 2012
I have a VB.net application that has three project in it. Two of the project are DLL with references in the primary project. I have a public Model "RegSaveGet" in the primary project listed below. When I look for the namespace for the module from one of the DLL projects I can not see it. I want to use this module from the two DLL projects. I can only see it from the primary project.
[Code]...
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Feb 21, 2011
I want to check in an Access Database if a primary key exists using VB.Net & OleDb:
By primary key name
By number of fields as primary keys
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Feb 8, 2010
I have a database program, and the first row of the table i'm inserting into is a primary key, just a number that increments by one each row. This is my SQL statement,
SQL = "INSERT INTO Squad VALUES('" & (NUMBER) & "','" & txtfirstname.Text & "','" & txtsurname.Text & "','" & txtdob.Text & "','" & cbxposition.SelectedItem & "','" & lblhiddenid.Text & "')"
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Apr 29, 2009
I am in the process of creating a system using VB in Microsoft Visual Studio 2008. The system which I am creating is connected to an Access database via a tableadapter.Currently, I am coding a form for a table called Employee and this form allows the user to create a new employee, edit or delete an existing employee. Editing and deleting an existing employee works fine but adding a new employee is causing me trouble. When I specify an employeeID (this is the primary key), the declared value is stored appropriately in memory and it also displays in the form, however once I save the new employee to the database, the employeeID always defaults to 0 for some unknown reason. So, the record which I've just entered has a primary key of 0 regardless of what the the primary key should be.
The employeeID is declared as an integer and the value is obtained by getting the employeeID of the last record in the table and adding 1 onto it. I've also tried hard coding the employeeID and a specific number, but this does not make any diffence. I've reused the code from another part of the system which works fine before, but why it suddenly doesn't work is baffling me. The employeeID field in Access is a long integer.
[Code]...
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