After beating my head up against a brick wall for weeks I finally discovered that VB 2008 will not allow CopyToDataTable from a LINQ Query that uses a join.Can anyone provide me with alternative that will let me get a datatable from a join query?
View 4 RepliesI have a function in a VB.Net script file, but it produces the error 'CopyToDataTable' is not a member of 'system.array'.
Public Function CollectionFromTable(tableName As String, sql As String, sortOrder As String) As DataTable
Dim foundRows() As DataRow
[Code]....
so I've come across something which is perhaps a flaw in the Extension method .CopyToDataTable. This method is used by Importing (in VB.NET) System.Data.DataTableExtensions and then calling the method against an IEnumerable. You would do this if you want to filter a Datatable using LINQ, and then restore the DataTable at the end.
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Iwant to join two tables,'Employee' and 'Dispatch'. Dispatch has column 'DispatcherID' and 'TechnicianID' which are both foregn keys to EmployeeID in Employee table.I want to join these two tables using EmployeeID so that i can obtain the matching name to each id.but it only works when i make a single join to either DispatcherID or TechnicianID and not for both.
[code]
select Employee.firstname+' '+Employee,secondname as Technician,Employee.firstname+' '+Employee.secondname as Dispatcher from Dispatch inner join Employee on Dispatch.TechnicianID=Employee.EmployeeID inner join Employee on
[CODE]...
I've trying to do an inner join select statement where I select two fields from a table, and than all the records of a field in a second table that have the same id as the first table.The code looks as follow:
Dim conn As OleDbConnection
Dim cmd As OleDbCommand
Public Sub openDB()
[code]....
I get a an exception: "invalid bracketing of name [Vegetables Descriptions.DescID] if I take it out to make it look as follow I get a "Join expression not supported"
da = New OleDbDataAdapter("SELECT [Vegetables Descriptions.Task], [Vegetables Descriptions.Description], [TasksOcc.When] FROM [Vegetables Descriptions] INNER JOIN [TasksOcc] ON [DescID] = [DescID] WHERE [Vegetables Descriptions.VegeID] = vegeID", conn)
I tried folowing examples from the net but where unsuccessful.
I'm trying to join two datatables of same keyfields.
table1
ID Class
---- -----
1 10
2 9
[code]....
Result
ID Class1 Class2
1 10 8
2 9 7
I've been using Java for a number of years, and now I'm at the beginning again with VB.NET.How would I go about joining two tables?- order doesn't matter, as long as i can print/display the order
Here's an example of what I'd like to do:
table 1
data 1 , data 2 , date time
12 , 23 , 2010/8/20 10:00:00
[code].....
how to join two datasets together.
First Dataset
Dim sql As String
sql = "SELECT payment.Debtor, SUM(Value_invoice) AS before_this_month,debtor.nama FROM Payment INNER JOIN dbo.debtor ON Payment.Debtor = debtor.debtor" & _
[code]....
Now i just want to either inner join or left join PaymentBeforeThisMonth and PaymentThisMonth into another dataset?
i am developing a software for tecnichal assistance. i am using a acces database which consists in two tables assitance and cliente and i use inner join to connect t«the two tables. now i connot save data on the table i made the inner join. What code i have to use to save on the table?
View 1 Replieshow we use inner join in oledb( acces ) ? this is false :
cmd = New OleDbCommand("select lesson_name as ,lesson_type from choice inner join present on choice.p_code=present.p_code inner join lesson on lesson.lesson_code=present.lesson_code
and this:
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I created a datatable from ado.net, myDatatable. Is it possible to make inner join on myDatatable from a select statement, like below?
select * from order o inner join on o.productID = myDatatable.productID
I have two datatables which I intends to bind them to Gridview. But I need bit of the first dt and bit from second dt.
Second table has only one row that represents to every row in the same column in first table.
There is no primary key or relationship between two tables though.
For example,
I tried datatable.merge though. Didn't produce the last table i want.
when I use multiple inner joins I get replicated values but there is only one record,
"Select table1.Field1, table1.field2 as QNR" & _
", table2.field1, table2.field2, table3.field1, table3.field2" & _
" from table1 Inner table2 on table1.field1" & _
" = table2.field1 Inner Join table3 on table2.field1" & _
" = table3.field1"
QNR should only show one value, but is shows the one value three times?I bind it to a list box using the following:
lstQuotationNr.BindingContext = Me.BindingContext
lstQuotationNr.DisplayMember = "QNR"
lstQuotationNr.DataSource = Dataset
I'm trying to do a join on two tables but i'm having a hard time. Here's the table schemes:
table1 : tbl_Trainees_IntentToParticipate
Scheme:
TraineeID (PK)
FName
LName
I want to select all TraineeID/FName/LNames from table1 where TakenTest (from table2)= false
heres the sql statement I have so far:
SqlJoinStatement = "SELECT tbl_Trainees_IntentToParticipate.FName, tbl_Trainees_IntentToParticipate.LName" _
& "FROM(tbl_Trainees_IntentToParticipate, tbl_Trainees_TabScores) " _
[code]....
how to join 3 tables, I have the following statement but I'm getting a missing a (syntax error "operator error")
da = New OleDbDataAdapter("SELECT [S].[Scheduled Vege], [V].[Description],
[DS].[Task], [DS].[Task Date], [DS].[Completed] FROM [Scheduled] AS S
INNER JOIN [Date Schedules] AS DS ON [S].[SchedID] = [DS].[SchedID]
[code]....
I have a strongly typed DataTable in my app which is generated with a couple of SQL joins. I use it to display data in a human readable way.[code]....
View 1 RepliesI have this query that I tried to join 2 tables together, one which holds the product name, and product numbers, and take a product number, and go to the other where to find a Art_no which is like the product number.[code]
View 2 RepliesI am working on a Visual Basic 2008 program using an Access 2000 database. My SQL codereturns no records, but I know the table has a record. A simplified example of the code looks like this:
SELECT Table1.Field1, Table1.Field2, Table1.Field3, Table1.Field4, Table2. Field1, Table2.Field2 FROM Table1 INNER JOIN Table2 ON Table1.Field1 = Table2.Field1 AND Table1.Field2 = Table2.Field2 WHERE Table1.Field1=@Field1 AND Table1.Field2=@Field2;
[code].....
I'm trying to learn EF in visual basic. I'm struggling with finding any easy to understand simple tutorial of how to do inner joins.
This is the SQL that i'm trying to replicate in EF:
SELECT Quote.LockedDateTime, IncommingQuoteStatus.StatusDesc, Users.FirstName
+ ' ' + Users.LastName AS UserName
FROM Quote
[Code].....
I dont have a huge wealth of experince with SQL statements and im struggling;
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I would like to list all of the job titles(for which there could be multiples as different employees can have the same job title) in the employee table and find the maximum amount of hours for that job title as the hours could be different for different empoyees.
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is there a simple way to join together string arrays. like say i have a string array "a", "b", "c" and i would like to get the string "a:b:c".currently the method im using is to loop through the array each time and manually join them to the string?
View 2 RepliesI'm working on a project in vb.net 2010 that has 3 RichTextBoxes. Two of the RichTextBoxes can be loaded with text from text files. How do I take the multiple lines of text from each RichTextBox and combine them into the 3rd RichTextBox.
For example, if 2 of the RichTextBoxes contain the following lines of text:
(RichTextBox1)
Monday
Tuesday
Wednesday
(RichTextBox2)
Jan
Feb
Mar
I want the 3rd RichTextBox to show following result:
(RichTextBox3)
MondayJan
TuesdayFeb
WednesdayMar
Given two tables, customer and orders, how would one do a linq query to entities to find any customers with open invoices started before a certain date?
View 1 RepliesWhat's the easiest way to join an array of strings?
View 3 RepliesUsing VB 2008 EE
Here is a string called "TextCollect"
CODE:
This line of code splits it into an array so each line is accessible individualy
Code:
This line is supposed to turn it back into a single string
Code:
However it gives the error:
Overload resolution failed because no accessible 'Join' can be called without a narrowing conversion
I am reading two lines of data into an array, the data being split by commas (,).[code]...
View 2 RepliesI have two DataTables:
dt1 - personid, name
dt2 - personid
I want to create a third datatable to include records from dt1 when they are NOT in dt2 using LINQ. In this case, I can bind the third datatable to a dropdownlist.
How To Join Two Datatables From Different Datasets (With One Commn Column) ???
View 2 RepliesHow can i Join two tables in datagrid view? Presently this is the command which still cant work after i tried the sql JOIN command...
Dim cmd1 As OleDbCommand = New OleDbCommand("SELECT * FROM LECTURE_DETAIL WHERE LECT_ID = '" & cmd_lecID.Text & "'", con)
I get the error:
One or more errors occurred during processing of command. ORA-00918: column ambiguously defined
I am utilizing the following code to rename a computer and join it to a domain
[code]...