VS 2010 - Get Column Value SQL Query?
Apr 20, 2011I'm having a small issue, but somehow I simply don't see it.I'm trying to get a value from my database according my query:
[code]...
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VS 2010 Query An Unbound DGV To Get A Collection Of Rows Where A Column Contains A Certain Value?
Jan 6, 2011Is it possible to query an unbound DGV to get a collection of rows where a column contains a certain value? Can LINQ do this?
View 10 RepliesVS 2010 : Pass Combobox Value In Query Builder Filter Column?
Jun 17, 2011I'm develloping a small application over na Access 2007 database. how can i pass the value of a combobox to a query being built with the query builder tool?If I use ? in the Filter column I�m prompted to enter the value but what I need is to pass the value of a combobox in a form. I tried to use:
HTML
=MyForm.MycomboBox.Value
but it is ignored, interpreted as the value to be filtered.
Retrieving Column Names Using Sql Query
Sep 25, 2010I have A database in access2007 I want retrieve column names with sql query in my project I write below code: "select column_name from information_schema.columns where table_name ='table 1' ORDER BY ORDINAL_POSITION" but display error : Could not find file 'D:ProjectsTapco_ECMTapco_ECMTapco_ECMinDebuginformation_schema.mdb'.
View 3 RepliesSelect More Than One Column In A Linq Query?
Nov 2, 2009Dim MyQuery = From c In xdoc.Descendants() _
Where c.Attribute(OriginY) IsNot Nothing _
Order By Val(c.Attribute(OriginY).Value), Val(c.Attribute(OriginX).Value) _
Select c.Attribute(UniStr)
Right above you can see my First! linq attempt! And here comes my first question.
How can i select more than one column in a linq query in vb.net?
For example... Select c.Attribute(UniStr) AND c.Attribute(OriginY)
Select Query Using Date Column?
Mar 30, 2009The data type for my DATE column in SQL is smalldatetime. I want to perform a query which selects records based on the the selected date of a calendar object.
A user clicks on the date and the date is stored in ddlfilter2 DDLfilter2.Items.Add(CalendarMain.SelectedDate)
mystring = "SELECT * FROM view_main where date" & "='" & DDLFilter2.Text & "'"
produces this "select * from view_main where date='24/03/2009'
I then get an error saying "The conversion of char data type to smalldatetime data type resulted in an out-of-range smalldatetime value."
In the SQL database the data is displayed as "24/03/2009 00:00:00" is this why the query is failing?
Show A Query Alias In Column?
Aug 13, 2009I 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.
Sql - Query Excel Using ADO When A Column Name Is A Number
Feb 8, 2011I am using VB.NET to query via SQL an Excel spreadsheet using ADO. The general way is like this: SELECT [firstname], [secondname] FROM [Sheet1$] Which works perfectly
However, one of the headings is called 3, so I want to do: SELECT [firstname], [secondname], [3] FROM [Sheet1$] However, this does not work. I know I can use * to get all columns, but later on I want to use (using dataReader): dr("3") which won't work
SQL Query To Search 3 Different Column In One Table
Jul 27, 2011I have 3 textboxes and need to search differently for each of the textboxes. For example textbox1.text is searched in column ans1, textbox2.text is searched in column ans2 and textbox3.text search in column ans3 in table Answer. is there any sql query that can do the search in one button click event.
View 3 RepliesUpdate Column In Access Using Query?
Jan 4, 2012I 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
Wrong Column After SQL Query In ListView?
Apr 7, 2009i have a small ListView in my form. The have only 2 Columns (Datum) and (Anzahl). When i fill the ListView the first Column is not filled, only the second Column (Anzahl) is filled with "Datum". How can i get the "Datum" in the Datum-Column?
Here is my code:
Dim selStr1 As String = "SELECT CONVERT(VARCHAR(10),datum,101) AS Datum, COUNT(*) AS Anzahl FROM stat11patienten WHERE datum BETWEEN '" & startdatum & "' AND '" & enddatum & "' GROUP BY CONVERT(VARCHAR(10),datum,101)"
Dim da1 As New SqlDataAdapter(selStr1, conn)
Dim ds1 As New DataSet()
[code]....
VS 2010 : Select A Column From A Dataset Based On The Value In Another Column?
Nov 15, 2010I'm writing a help application for the Customer support team at my company to help agents ask better questions when customers report problems. In it, I've got a SQL database that contains all the products, topics, and questions. The layout is similar to the following:
Products Table:
Product_ID Product Name:
Topics Table:
Topic_ID Product_ID Topic
[code]....
I don't know if I'm making myself clear, but I basically need to do the equivalent to the following SQL statement: "SELECT PRODUCT_ID FROM Products WHERE PRODUCT_Name = LstProducts.SelectedValue"
Column Alias In Access Query Database
Jan 9, 2012I 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".
Datagridview Column Order From Linq Query?
Mar 19, 2010I am using a modal form with a datagridview in order to populate textboxes on a parent form. The datagridview is bound to an anonymous type resulting from a linq query, which varies depending on the textbox control whose keypress event is called. I always want to display a key value in column 0 of the datagridview (along with a variable number of additional columns), and then use that key value once the user selects a row.
However, when setting an anonymous type from a linq query as the datasource for a datagridview control, the columns are indexed alphabetically rather than in the sequence selected in the query. This requires setting the displayindex as a workaround, and then keeping track of which column contains my key value. I read elsewhere that this was something fixed in VS2008 SP1, but I still encounter the behavior.
DateTimePicker Incompatible With Column Expression Is SQL Query?
Dec 12, 2011I have DateTimePicker, and when I execute this procedure:
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
Me.TextBox1.Text = Me.DateTimePicker1.Value
sqltest = "SELECT * FROM Table " & _
"WHERE TOT_DATE = '" & Me.DateTimePicker1.Text & "'"
datest = New OleDb.OleDbDataAdapter(sqltest, con)
datest.Fill(dstest, "datepickertab")
Me.DataGridView1.DataSource = dstest.Tables(0)
End Sub
Fill Datagridview Column With Sql Query And Data?
May 6, 2011i want to fill my datagridview column with sql query and data i have 1 datagridview in datagridview 4 column
column1 column2 column 3 column4
this gridview is undound
i want to fill with sql data
LINQ Query For Deleting One Column From List(Of)
Jun 28, 2011I have this code:
[Code]...
Query Dataset Column For Only Rows With Text?
Sep 19, 2009I have a dataset column that I am keeping comments in. If the row has no comment in it(defualt string value is "", not NULL), I don't want it to show up on my report. How can I fill only the datarows that have text in them and not the ones that are empty. I've tried to filter the columns results by Not Nothing, but everything shows up. I'm guessing because it's actually not NULL since the string is "". How can I filter these results correctly?
View 2 RepliesQuery To Retrieve Data From A Column Having Checkboxes?
Jan 11, 2010I am using VB express 2008 with MS-Access as database.How i can retrieve data from a table having a column containing checkboxes on the base of Checkboxes checked or unchecked. Column PAID is having checkboxes.[code]...
View 5 RepliesSql - Pass Multiple Values From Same Column In A Query?
Aug 23, 2011Hpw can I pass multiple values from same column in a query? I am using vb.net and sql server database.
With my query an exception is generated saying that @booking_date has already been declared try a different variable....
My query is:
Dim da As New SqlDataAdapter("select * from Bookings where booking_date Between (@booking_date AND @booking_date) AND booking_time Between (@booking_time AND @bookinbg_time) AND game = " & x, con)
Sql - Query Column Names That Contain Square Brackets?
May 4, 2012I have a csv that I need to parse into a gridview in vb.net. If I do SELECT *, I get the data without issue. However, I am in a situation where I need to reference the actual column names. And problem is, I have no control over the app that generates the csv, and they make the column names enclosed in square brackets.
How the heck can I do something like this:
Dim cmdSelect As New OleDbCommand(SELECT "[name], [height] FROM myTable")
so I get a return of data?
So, in an effort to be perfectly clear: I have an app that creates a csv with the column headers [name] and [height] in a table called myTable, and for the life of me I can't figure out how to return [name] and [height] specifically.
SQL Query To Update The MAX Within A Set Of Common Numbers In A Column?
Jun 11, 2011I have program in VB.NET 2008 where I want to update the premamt cell value in the tblPrem Access table, where the premno is the maximum (autogenerated as 1,2,3...), but only within a specified set of common numbers in a column (contno) I am currently saving. This contno is from another table (tblMain) linked in this table (tblPrem) where it is the primary key, and just repeatedly generated after the clicking save button. Here is my current code which saves the data but does not do anything on the textbox1 + textbox2, and has an error message "At most one record can be returned by this subquery":
sqlQrySave = "UPDATE tblPrem SET premamt = " & textbox1 & " + " & textbox2 & " WHERE premno=(SELECT MAX(premno) FROM tblPrem GROUP BY contno);"
What I expect to happen is like this:
contno | premno | premamt
1................1.............45
1................2.............45
[Code].....
Writing A Query For A Column Named With Two Words?
Feb 15, 2010I'm trying to make query in a table that has a column named "First Name"
dim info = from md in employees _where md!first name = "test"
How can I use the field "first name" in this query.
I've tried "first name" and ""first name"" but neither works.
VS 2010 : Search For Column 1 In Text File 1 And Display The Matching Column 2 Field In Column 2 Text File 2?
May 23, 2012I have two text files, the first text file has two columns separated by a space (" ") and the second text file only has one column.
The column 1 in text file 1 and text file 2 match albeit in different order, what I'm trying to achieve is for every field in column 1 text file 2 I want to search for column 1 in text file 1 and display the matching column 2 field in column 2 text file 2.
Dim*OpenTextFile*As*String*= IO.Path.Combine("C:Test1.txt")
Dim*OpenTextFile2*As*String*= IO.Path.Combine("C:Test2.txt")
Dim*SaveTextFile*As*String*= IO.Path.Combine("C:Test2.txt")
[code]....
MS Access Function To Return Conditional Column For Query?
May 21, 2009I'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.
Query A DataTable To Find All Of The Unique Values In A Column?
May 7, 2010How can I query a DataTable to find all of the unique values in a column? SQL has the 'unique' or 'distinct' keywords, but I dont know how to do this against a DataTable.
View 6 RepliesSet Value Of A Gridview Column Depending On Result From MS Access Query?
May 7, 2011I have a query which is pulling values from a table in MS Access
SELECT
tblInstructor.InstructorID,
tblInstructor.Football AS InstructorRole,
[code].....
VS 2010 Datagridview: Move To Column 4 But Instead To Column 5
Apr 9, 2011I want to move the cursor from column 1 to column 4 but what happened instead the cursor moves to column 5, this happens when I use the enter key event. but run well if I double click. The following description of the program: there are 7 columns of code, item description, unit, price, qty, discount, item amount code when key enter press :
[Code]...
Query That Will Return All Of Column Names In A Microsoft Access Table?
Aug 17, 2010I 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?
Sql - LINQ Generating Bad Query - Error Unknown Column (MySQL)
Sep 16, 2010I'm developing in MVC2 using VB.NET and MySQL and ran into a problem trying to convert a simple SQL query to LINQ. SQL Query:
[Code]...
Looking at that query its easy to spot whats causing the error. Simply, the most inner query only returns 2 columns, while the query right above it is trying to SELECT 3, thus the Unknown Column Error. So why is this happening? What is wrong with my LINQ query?