I am using a query in vb.net, database is Access. I need alias of query like sql but the query return me column alias and also ' '
SELECT COLUMN1 AS 'FIRST NAME'
I expect the result to be a field called FIRST NAME but it returns the string "FIRST NAME". Is there is any way if return me the field FIRST NAME instead of "FIRST NAME".
I am using a databound datagridview control. I created a custom query to fill the grid with which includes joins and using alias names in the sql query for the joined fields. Here is the query I am using:
SELECT Events.[Date], Events.[Time], Contacts.LastName AS Lastname, Contacts.FirstName AS Firstname
FROM (Events INNER JOIN
Contacts ON Events.ContactID = Contacts.ContactID)
The datagrid views fine using the columns that are in the events table. I want to be able to view the aliased columns from the contacts table in the datagridview as well.
How can I display the joined columns in the datagridview? Maybe there is a better way to do this? Maybe this is not enough information for a resolution.
I am using a sql server database and i am storing the time value in the datetime variable. I am developing a booking system application in vb.net. When I want to view already made bookings using datagridview and by implementing dataadapter and dataset...When the table is shown in the datagridview I want custom column names to be shown so tell me that how can i use alias in the query given in datadapter initialization part?
View 1 RepliesI am connecting to an Access database and using a parameter query with the LIKE operator to return all rows that match query. The string to search for is taken from a Textbox
sql =
"Select * FROM Allview WHERE Info Like" &
"*" &
CStr(TextBox1.Text) &
"*"
The query does not return any data in vb, but when run from access with same string, there is data returned.The connection to the database is done correctly, as I am able to return data with various other queries.
Partial code :
Dim
con As
New OleDb.OleDbConnection[code]....
I need to update a column by adding a value in Access:
update table1 set column1 = column1+value
In the above, if column1 is null, then the table is not updated.
I need a function like in SQL Server:
update table1 set column1 = isnull(column1,0) + value
I'm working on an access database and there is a problem I can solve in a circumvented way but I was wondering if it can be done by using a function in query.The case: I have a main data table and 2 other tables joined to it.
maintable
country | city...... | postalcode [code].....
From one of the tables I select the respective zone for the postal codes in the main datatable, ie. if the row's postal code column contains 1000 (just an exmple) then the postal code is searched in the "zone" table "from" & "to" columns using "between", and it results in for example "zone1" (zone column). This is a clear thing, it works okay.However I need to select the respective rate column (based on the rows' weight column) from the rates table selecting the appropriate zone.
I can solve this by a switch statment (select country, city.... switch( zone="1", [1], zone="2", [2] etc.) but it gets very tedious when for example I have a rate table with 15 columns, you can imagine that.My question is if I could create a custom function which returned the respective column based on the result of the zone column.is there some way to get the function's return value to be translated in the select statement? for example select country, city....getzone("rates",[zone]) .....
I know that the rates table do not follow the relational database's main principle and it should look like fromkg | tokg | zone | rate and it would work like a charm with "where"but these tables are changed regularly and I receive them in excel...but maybe transforming the tables each time by unions would easily solve my problem doesnt it?I'm still interested if VBA custom function could be used for such a purpose.
I have a query which is pulling values from a table in MS Access
SELECT
tblInstructor.InstructorID,
tblInstructor.Football AS InstructorRole,
[code].....
I have a Microsoft Access database that I connect to with the Jet Database Engine, using VB.NET. I want to programmatically get all of the column names for a particular table [code]...
Is this possible in Access? If not, what are my options for getting the column names?
I am having a problem with the project I am working on. The project will have more than one query; however, I cannot get the simple one to work yet. I have a form with two text boxes and a button. I also have an Access database that I want to be able to connect and query to.
The database will have fields such as student name, address, test1 and test2. I want the form to allow a user to put in scores for test1 and test2 in TextBox1 and TextBox2, then query the database to say
[code]...
I created a Query in a database in Access. I want to attach it to a DataGridView in VB2010. I then went to VB and connected to a Database. Then I dragged a DataGridView onto the form. Up came a pop-up menu. I Clicked on Choose Datasource, Add a DataSource,clicked on all the next buttons, selected Tables and Views checkboxes and clicked finish.In the next view up pops a menu that lists my Database and it's tables, but not the created Query. The Query does exist in the Database and I am accessing the correct version.
View 3 RepliesI have an application that uses an *.accdb file as the back-end database. Connecting to and retrieving data from the access file is not an issue and is working quite well. However, as a precaution, I have the application first check to make sure the database file exists in the application's folder while it loads up. As a convenience, if the database file is not found, then the application creates a new (structured, yet empty) database. The creation of the actual *.accdb file and the creation of the tables is complete and is also working well.
View 1 RepliesI have a query in Access called q1. I want to modify q1 from my vb.net code. How can I do so?
View 2 RepliesI know how to do the type of query in this thread [URL] I am wondering know how to do the same thing with linked datatables.
Or is there no difference, i just don't need to have "Where" clauses?If you're not living on the edge, you're taking up too much room
I am using MS access 2003 and Visual Basic.net 2010. I have made a query with the SQl code below. I have set my search button's click to fillbylastname which is my query name. My question is, how do I get it search my database with textbox2's text?uery:WHERE ([Last Name] LIKE '@LastName = %')
View 3 RepliesI am using following code and trying to get data by given parameters. I donot know how to pass the parameter value to my query.
[Code]...
My program has an access database with a table called "Contacts". This table stores many values. I have a seperate table that stores surveys. Each contact should have a column for every survey, indicating whether or not the survey has been completed. However, this means I need to add columns to the database while the program is running. I tried the following code, which runs WITHOUT errors, but does not seem to actually add the column.
contactsDataAdapter = New OleDb.OleDbDataAdapter("SELECT * FROM Contacts", frmAdmin.con)
contactsCommandBuilder = New OleDb.OleDbCommandBuilder(contactsDataAdapter)
dtContacts.Clear()
[Code].....
I'm using vb2005express for forms (front-end) and ms access database. I have a form with a master-detail setup. The problem I'm having is that when I set the primary key column to autonumber, I don't get the pk value generated in ms access database into my master datatable in forms when a new record is created. Then I tried setting the AutoIncreament to True in the pk column of the datatable in my dataset (forms). This generates a number in my pk column but its not the number generated in the database (since I think because the pk column is still set to AutoNumber). So I change the field property of my pk to Number in the access database and on my dataset (forms), i still have AutoIncrement to True.
This works okay since what it seems to be doing is getting the max value for the pk column when the datatable is filled upon form load. The problem now is that I normally don't do tableadapter.fill(datatable) at form load since I think there would be a performance issue if record counts around millions. What happens now is that when I create a new record, the pk generated is still 1 which will cause duplicate violation when saving to database. I'm not quite familiar with access features but in oracle, what I do is I create a sequence in database then I create a function that gets the next value of the sequence. Then at form load I set the datatable.column.default_value = get_sequence. How do I do this in ms access?
I have a form showing a datagrid that is filled with info from an Access database table. The table only has 3 fields: two of them are string type and the third one is boolean. The first String type field is also the primary key (this field is called "clave"). This datagrid is supposed to let the user select one of the rows and then click on a button to delete that row. I'm trying to do that with the following code:
[Code]...
I have a form showing a datagrid that is filled with info from an Access database table. The table only has 3 fields: two of them are string type and the third one is boolean. The first String type field is also the primary key (this field is called "clave").This datagrid is supposed to let the user select one of the rows and then click on a button to delete that row. I'm trying to do that with the following code:
[code]...
Operation must use an updateable query (database access 2007)
View 3 RepliesI have a program in which I want to have the user enter two percentages and display the data matching the criteria on a new form. The query would be:
Select *
From Corrosion
Where corrpct1 >= {column in database} OR
corrpct2 >= {column in database}
The way I currently have it written is to display only one row of data. I need to display any number of rows that meet this criteria. My current code is:
Private Sub btnDetails_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDetails.Click
Dim form As New frmDetails()
Me.Hide()
[code]....
1. How can I do my query to incorporate the user entered criteria (in the where statement)?
2. How can I display ALL of the data instead of just one line?
I'm new to VB.NET. I'm trying very hard to not go screaming back to VB6...... I have a Query stored in an Access2000 database called 'build_VNMON'. (Does that make it a Stored Procedure ?) It uses multiple tables and multiple Union Statements to arrive at the desired results. It may not need to be as convoluted as it is, but I inherited it, and it works. What I really need is to output one column of the build_VNMON result to a text file, so I'm trying to use an OleDbDataReader.
[Code]...
[Code]...
how can get the name of the table that = to the name of the combobox1 when i select it.
[Code]...
I need to add a new field to an Access database table, the user has filled the table with data, so I have to add the new field but to preserve the old data.
I have found the ALTER TABLE statement, but it gives me an error (ALTER TABLE is not a valid statement)
I done this in php+mysql with "ALTER TABLE People ADD Address TEXT NULL AFTER Name" (as an example)
How can do this in VB2010?
How can I get information what data type a certain column is. (Integer, string, memo,...)
View 1 RepliesI have an access database with several tables. in one of the tables there are three columns named quantity, price and total cost.total cost is an expression of (quantity * price). the expression looks grate in the datagrid etc but when I need to save it to the database
View 1 RepliesI have a database in access and one of the fields is 'Is Quick'. I have a query that filters all of these out. How would I get the data from that query in Visual Studio 2010 (Express). VB code please.
View 1 RepliesI'm writing small VB.Net app which should build reports based on data gathered from some external MDB-files (Access 2007).
It was planned that this app will use parametrized SQL queries to collect data from DBs.
One of the parameters for these queries is path to the external MDB-file.
Here goes sample code:
Dim conn As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:TempTemp.mdb;")
conn.Open()
[Code]....
Looks simple but doesn't works. After launch my app throws following exception - System.Data.OleDb.OleDbException: Disk or network error.
Have spent a whole day to make it work with no success. What have I done wrong?
i am relatively new to VB and i am working on a Visual Basic Program to build a Student Record Book where all the information is stored to an Access 2007 database. If the user is an administrator they will be able to add a new student, update delete etc. I managed to implement INSERT/DELETE/UPDATE functions and also a search button and they all appear to be working fine.
View 4 RepliesI'm writing small VB.Net app which should build reports based on data gathered from some external MDB-files (Access 2007). It was planned that this app will use parametrized SQL queries to collect data. One of the parameters for these queries is path to the external MDB-file.
Here goes sample code:
Dim conn As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;" _
& "Data Source=C:TempTemp.mdb;")
conn.Open()
[Code]....