I have a VB.Net dataset that contains data from multiple tables. how to query data out of the dataset. I want to run SQL-like queries on a dataset to extract data that fits a certain "where" statement.
View 3 RepliesI have a small project i am doing for work to compare our website catalogue to our actual inventory in our financial software. To do this, i have exported the online catalogue as a delimited text file using "^" as the delimiter. I then want to go into our Accpac data a find out if all the items are still active, the current price and the stock on hand.
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First off I'm a newbie to VS but hopefully my question isn't terribly clueless. I've been searching endlessly for an answer but I don't find much relating to VS 2010 I'm running VS2010 Ultimate and I'm creating a Windows Form app in VB .net 4. I'm connecting to SQL Server 2005.
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I am a new user. Apologies if I am posting this in wrong place and also if it is repeated one. I have few queries:
1.Is it possible to store multiple tables in a single DataSet?
2.If yes then it is a good practice? or should i prefer having separate connection object, separate DataAdapter and separate DataSet for each of the table to be accessed? I am new to VB.NET and using VB.NET 2008 Express and MS-Access 2007 as backend for my project.
How to Query multiple tables in a dataset to form single consolidated table without using any external database. I know this can be done using 'JOIN' in SQl.
Now my condition is I have multiple tables filled with data in a dataset and each table is interrelated with a common 'column'. For example ,
Table 1
ID
Name
1
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Here I mentioned only two tables but in my case there are many tables. I need a generic answer for this dynamic query .
while trying to run the following code:-
Public
Class Form1
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I've been working with a remote mysql database. The design of the database pretty much requires that I use SELECT commands that include multiple tables, and sometimes joins. Updating a single table query is SO EASY, yet dealing with multiple tables has me pulling my hair out.
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What's killing me is that if I make a change to a field in the products table in the datagridview and press button1, the changes are saved. If I make a change to a field in the specials table in the datagridview and press button2, the changes are saved. If I combine the two updates together in a single routine, only the first one is saved. I presume this is because after the first update executes, the dataadapter no longer reports that there are any changes to save, since the update already happened.
I've tried breaking this up into separate dataadapters for each table, but then even using dataset relations, I can't get the data together in a single datagridview. On top of that, the grid itself is only intended to be used for searching and querying data. It still needs to be bound along with a set of textboxes that accept the input.
Lastly, this database is part of an ever-evolving website database with dozens of tables that need interfacing. I just can't see manually maintaining hand written sql statements for every table. That's why I've been working so hard to get the commandbuilder to handle it.
The situation: I have a small application where i store customers and orders.. In my database i have a tabel called Customers and a tabel called Orders. These 2 dabases are joined on Customer ID - every Order record contain a row with the customer Id.
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I have an office project which shoudl basically do the following:
1) take different TEXT files of fixed-length fields and put them in separate tables.
2) use the data from the different tables and compile them to a master table in a mdb.
3) display data in compiled mdb in datagrid 4) allow editing in datagrid 5) save the data in datagrid into the mdb 6) save the data in datagrid in a csv file i did some googling and came up with the following code:
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I need to fill a datatable(in data set) row by row by providing the the data by variables in VB.Net. The variables assigns its value by loop.. so the datatable row should be filled row by row until the loop ends. There are three columns in the table. so the table should fill with different kind of datatype variables.
View 1 RepliesI think my subject sums up what I am interested in knowing. I am looking to create a chart where Series1 is from Table1, Series2 is from Table2 in the given Dataset. My code below doesn't throw any errors, but it appears to be grabbing the data for each series from the first table.
Imports System.Windows.Forms.DataVisualization.Charting
Public Class Form1
Public Sub New(ByVal ChartData As DataSet)
' This call is required by the designer.
InitializeComponent()
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There is a "how do I video" on how to properly control updates, inserts and deletes in multi-user applications on forms that edit master-detail related data. [URL] Massi worked through the process using Order (OrderID is PK) as the master table and Order Detail (OrderDetaiID is PK) as a related table in dataGridView. The dataGridView automatically generate orderDetailID whenever the mouse enters in a new row. I am doing a similar form, but placing order form and orderDetail form in two separate tabs in a tabcontrol, and also using Details view for both tables. When I click "new" button in BindingNavigator, the orderID is automatically generated. If I use dataGridView for my orderDetail tab, then the orderDetailID is automatically generated when the mouse enters. This allow me to insert/update tables correctly. However I need the Details View for my orderDetail form too. How do I get a orderDetailID automatically generated when user insert a new order and have the mouse click on OrderDtail tab?
View 1 Repliesi wanted to add data from a single form in vb to two tables in access but an error appears saying that the field customer_ID down to Contact_Number doesnt belong to the table record, though it really doesnt belong to that table.. but i already indicated the table for the customer_ID down to Contact_Number, which is Customer, in my sql statement...
Public Class Refill
Dim connect As New OleDb.OleDbConnection
Dim sql As String
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if it affects the run time of a program if I were to have multiple data tables as opposed to one data table with all my data in it? I am trying to minimize datagrids and just use code to access table data, in hopes that it will speed up my program. But I am ignorant if multiple tables vs 1 main table will make a difference because there will still be the same amount of overall data present in my program one way or the other....?
View 3 RepliesThis is a winform and I'm using mysql as a database, here is my code:I'm trying to add data into multiple tables.[code]Index and length must refer to a location within the string. Parameter name: length
View 2 RepliesI am used to creating a data set with data from one table, for instance:
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Now I am needing to add a second table. For instance, my second table "EQUIPMENT" has a field called "DESCRIPTION" that I would like to add to my dataset. The "WORKORDER" table has a field called "EQNUM" which is what the "EQUIPMENT" table uses as the primary key. how to combine these into one dataset?
i've a form which displays data from multiple tables of the same employee(personal details, salary details, etc...) and have a common field 'Empnumber'I want to retrieve data from all of them to be displayed in the form. Am not getting the sql statement required for this. the code i use is, rs.Open("Select * From employeetable,payroll,misc where employeetable.EmpNumber='" & text1.Text & "'", CONN, 3, 3) where text1 has the empnumber for which details are required and empnumber is the common field in all the tables...
View 2 RepliesI fill DataSet from Access Database then create Datagridview to display data. My problem is how to Save Data back to a different table in Database then the one used to create the DataSet? I'm using Visual Studio 2008 and Visual Basic 2008.Original Table used to fill DataSet is called RecordList the new Table will be RecordListReport.
View 8 RepliesI'm trying to read data in Visual Studio from multiple tables. How do you read data from different tables? Do I have to create
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how to display data coming from different tables in access in a form?...the case is this:
3 tables in access:
AddBook(tablename) - ISBN(primary key), Book_Title, Author
Student(tablename) - Student_ID(primary key), Student_Name, Course, Year
Transact(tablename) - Transaction_No(primary key), ISBN(foreign key), Student_ID(foreign), Date_Borrowed
i think you can already picture it out... so what i want is to display data from Transact table and also display the data from Student and AddBook table base on the value of the foreign keys in Transact table....
I am new to VB and I have a database that has three related tables. These tables show information about computer engineers.
table one is engineers details
table two is engineers allocated
table three is jobs
My form needs to have buttons where a user can obtain information
View details of all Engineers
View Names of all the Engineers working on a specified job.
Add a new engineer
I have set up the connection to the data base using the wizards and also made the dataset. How to handle retrieving the data from multiple tables.
Here is a screen shot of my data set
I'm trying to read from two tables in mysql:
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Or even other techniques on achieving the goal of reading data from two tables using data reader? This is a winform, not a web form
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I have Memberships and Bookings tables in database containing an attribute cust_id which is primary key in Memberships and reference key in Bookings. When i am executing data reader I want it to read cust_id values from membership table but it is reading it from the bookings table.....
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I want to update data within multiple tables using sql command object. I have following codes which would not be updated the data.[code]...
View 4 RepliesI'm using a SQL database and I want to bind five tables to one Binding Navigator.
View 3 RepliesI'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).
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I am combining data from multiple tables into one table for a presentation software. I am doing a select statement and running a loop. Inside that loop I have multiple selects and I build a datatable an enter the data into the main table. There is a ton of records and it takes forever.
'Requisition Demands
InsertStr =
"SELECT COUNT(*) FROM Requisition WHERE (DMD_DT = " & dateVal & ") AND (QTY_REQ > QTY_PEND_CANC + QTY_CANC + QTY_REJT) " & searchvalString
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SELECT
Login.LoginID, Student.[Student Name], Student.[Student address], Student.StudentID
FROM
Login
INNER JOIN
Student ON Login.LoginID = Student.LoginID
WHERE
(Login.username = @user) AND (Login.password = @pass)
RETURN
How do I display the Student Name, Student Address, StudentID, and LoginID into multiple textboxes?
I have looked at the answers in the forum and some seem dated. I an an old vb2 person and need to move up. I understand sql very well and use complex queries. First test project and trying to add multiple tables to a data grid (Only Form in project).I used the Data wizard to add the Access data base and worked by way through to near the end. The query works in the wizard and returns the correct rows. The error message is "The solution returned by the new query differs from the base query."
During the creation process I selected all the tables. Reading some of the old anwsers I get the inpression that VB 2010 does not handle multiple tables in a datagrid (forum items go back to version 2008).
I am trying to create a datagrid and export the contents to a text file using VB.NET and I am doing this inside an SSIS script task in order to automate the process to export a dynamic table to text file. I don't get any error and the files are created but the files are empty. [code]
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