Problem with JOIN

I'm learning aspx. I have the following code in my aspx:
SqlConnection connection = new
SqlConnection("server=(local)\\NetSDK;database=pub s;Integrated
Security=SSPI");
String sqlCommand = "SELECT * FROM Titles INNER JOIN MyTable ON
MyTable.title_id=Titles.title_id";
SqlDataAdapter command = new SqlDataAdapter(sqlCommand, connection);
..
..
..
This code returns the correct data set. However, when I use this code:
SqlConnection connection = new
SqlConnection("server=(local)\\NetSDK;database=pub s;Integrated
Security=SSPI");
String sqlCommand = "SELECT Titles.title_id, title, type, pub_id, price,
notes, pubdate FROM Titles INNER JOIN MyTable ON
MyTable.title_id=Titles.title_id";
SqlDataAdapter command = new SqlDataAdapter(sqlCommand, connection);
..
..
..
the returned data set does not contain the MyTable data.
What is Wrong?
"RuffAroundTheEdges" schrieb:
> I'm learning aspx. I have the following code in my aspx:
> SqlConnection connection = new
> SqlConnection("server=(local)\\NetSDK;database=pub s;Integrated
> Security=SSPI");
> String sqlCommand = "SELECT * FROM Titles INNER JOIN MyTable ON
> MyTable.title_id=Titles.title_id";
> SqlDataAdapter command = new SqlDataAdapter(sqlCommand, connection);
> .
> This code returns the correct data set. However, when I use this code:
> SqlConnection connection = new
> SqlConnection("server=(local)\\NetSDK;database=pub s;Integrated
> Security=SSPI");
> String sqlCommand = "SELECT Titles.title_id, title, type, pub_id, price,
> notes, pubdate FROM Titles INNER JOIN MyTable ON
> MyTable.title_id=Titles.title_id";
> SqlDataAdapter command = new SqlDataAdapter(sqlCommand, connection);
> .
> the returned data set does not contain the MyTable data.
> What is Wrong?
You are not asking for data from MyTable. All the fields in the select list
are fields from 'titles', aren't they?
|||If you place the star (*) in the selection list without any prefix for any
table, even all joined tables are used for selecting the columns, If you are
specifying the columns only these are selected.
So in your second example you should go for that statement if you want to
get those columns in addition:

> String sqlCommand = "SELECT Titles.title_id, title, type, pub_id, price,
> notes, pubdate,
myTable.*
FROM Titles INNER JOIN MyTable ON
> MyTable.title_id=Titles.title_id";
HTH, Jens Suessmeyer.
http://www.sqlserver2005.de
"RuffAroundTheEdges" <RuffAroundTheEdges@.discussions.microsoft.com> wrote in
message news:AC882F99-C17E-43BF-843E-0EF0D0B4ADC1@.microsoft.com...
> I'm learning aspx. I have the following code in my aspx:
> SqlConnection connection = new
> SqlConnection("server=(local)\\NetSDK;database=pub s;Integrated
> Security=SSPI");
> String sqlCommand = "SELECT * FROM Titles INNER JOIN MyTable ON
> MyTable.title_id=Titles.title_id";
> SqlDataAdapter command = new SqlDataAdapter(sqlCommand, connection);
> .
> .
> .
> This code returns the correct data set. However, when I use this code:
> SqlConnection connection = new
> SqlConnection("server=(local)\\NetSDK;database=pub s;Integrated
> Security=SSPI");
> String sqlCommand = "SELECT Titles.title_id, title, type, pub_id, price,
> notes, pubdate FROM Titles INNER JOIN MyTable ON
> MyTable.title_id=Titles.title_id";
> SqlDataAdapter command = new SqlDataAdapter(sqlCommand, connection);
> .
> .
> .
> the returned data set does not contain the MyTable data.
> What is Wrong?
|||The example shown in the FROM document page at;
http://msdn.microsoft.com/library/de..._pubs_2v8l.asp
has:
SELECT ProductID, Suppliers.SupplierID
FROM Suppliers JOIN Products
ON (Suppliers.SupplierID = Products.SupplierID)
|||I had to do more reading and found that the SELECT statement works
differently in a JOIN:
SELECT Titles.title.id, ..., MyTable.stuff FROM Titles JOIN MyTable ON
(MyTable.title_id = Titles.title_id)