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Hi,
I have one dataset, that contain one table now how can i retrieve one column in that table can you send me all possible approachments
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if u confirm only one table means
ds.dt[tablename].columnname
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Do you really mean 'one column', or do you mean 'one value from a particular row'?
If you really mean 'one column', then:
DataColumn column = dataSet.Tables[string tableName].Columns[columnName]<br />
or<br />
DataColumn column = dataSet.Tables[int tableIndex].Columns[int columnIndex]
If, however, you want the value stored for a particular column in a particular row in a table, then you need to index both the row and the column to get it:
object value = dataSet.Tables[string tableName].Rows[int rowIndex][string columnName (,DataRowVersion rowVersion)]
for example (the first method returns the current value in the described row's value list):
public object GetValueInRow(<br />
DataSet ds, <br />
int tableIndex, <br />
int rowIndex, <br />
string columnName)<br />
{<br />
return GetValueInRow(ds, tableIndex, rowIndex, columnName, DataRowVersion.Current);<br />
}<br />
<br />
public object GetValueInRow(<br />
DataSet ds, <br />
int tableIndex, <br />
int rowIndex, <br />
string columnName, <br />
DataRowVersion rowVersion)<br />
{<br />
return ds.Tables[tableIndex].Rows[rowIndex][columnName, rowVersion]<br />
}
Good luck.
The most exciting phrase to hear in science, the one that heralds the most discoveries, is not 'Eureka!' ('I found it!') but 'That's funny...’
-- modified at 2:16 Monday 22nd May, 2006
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Good day everyone,
Please help if you're interested in.
I need to make a login session for my webpage. How can I validate user name and password with the ones in database?
How should I start?
Thanks so much
eric
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What type of database are you talking about?
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eric_tran wrote: How should I start?
See this "How To" document on MSDN: How To Use Forms Authentication With SQL Server 2000[^]
"On two occasions, I have been asked [by members of Parliament], 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question."
--Charles Babbage (1791-1871)
My: Website | Blog
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Hi,
I have written a very simple application using VB6 and ADO that connects to a MySQL database. I want to be able to distribute the program to somebody who will not install DCOM (on windows XP), however I understand that DCOM is one of the file dependencies for MDAC to function.
At the moment the program references the 'Microsoft ActiveX Data Objects 2.8' library.
Here is the code I am using to connect to the database :
<code>Set gCnn = New ADODB.Connection
gCnn.ConnectionTimeout = 10
gCnn.CommandTimeout = 400
gCnn.CursorLocation = adUseClient
gCnn.Open "DRIVER={MySQL ODBC 3.51 Driver};" & _
"user=" & txtUser & _
";password=" & txtPassword & _
";database=" & txtDatabase & _
";server=" & txtServer & _
";option=" & (1 + 2 + 8 + 32 + 2048 + 16384)</code>
To be more specific when the program is run on the machine without DCOM a message box is displayed with the message "-2147467259 Unspecified error".
I am curious to know if there is any way to make ADO work without first installing DCOM, or alternatively is there another method that I could use instead?
Thanks in advance for any help,
Mark
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Hello community.
I have a problem and cannot solve it:
How can I measure the query execution time from my C# application?
I need to get a number or a time class to my app. from my database server, but
not measure the time when I got the informations from db but the internal time in db server. So I will display something like "Execution time: 0.0015 ms" in Sybase Interacive SQL.
I'm using Adatptive Server Anywhere v8 and v9
thanx lot
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I have three tables
1) AssignProjectUser(ProjectID,UserID)
2) Task(ID,ProjectID)
3) AssingnTaskUser(UserID,TaskID)
I will create Trigers that after inserting a assignProjectUser
I will select all the task who have the ProjectID inserted in AssignProjectUser and insert list of AssignTaskUser that have the userID same assignProjectUser and TaskID that i have selected
Exemple:
suppose that I have
TASK:
1 1
2 1
3 2
when I insert a assignProjectUser (1,15)
the number of task for this Project is 1 and 2
so the trigers will add
(1,15)
(2,15)
I hope that you understand me
and really need help as soon
thanks
DADAX
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CREATE TRIGGER trg_AssignProjectUser ON [dbo].[AssignProjectUser]
FOR INSERT
AS
INSERT INTO AssignTaskUser (UserID,TaskID)
SELECT inserted.userid,task.id
FROM task INNER JOIN inserted on task.projectid = inserted.projectid
----------
There go my people. I must find out where they are going so I can lead them.
- Alexander Ledru-Rollin
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OK, I think this must be possible, but my head is melting and running out my ears, any help appreciated. I have table structure like this:
Table: Statement
Columns: ID (PK)
Name
TypeCode
PeriodId
Table: Heading
Columns: ID (PK)
StatementID
Name
Table: Line
Columns: ID (PK)
HeaderId
Name
These three tables make up a hierarchal 'tree' of data for a statment (structure simplified for this example). Each statement has a period represented by an id, and there will be a number of statement types for each period. What i need to do is copy each statement for a period and all of it's children to a new period.
After creating the new statements in STATEMENT table (simple), I've been able to do this:
INSERT INTO Heading (STATEMENTID, NAME)
SELECT SNEW.ID,H.NAME
FROM HEADING H
INNER JOIN STATEMENT S
ON H.StatementID = S.ID
LEFT OUTER JOIN STATEMENT SNEW
ON S.TYPECODE = SNEW.TYPECODE
AND SNEW.PeriodID = @NewID
WHERE S.PeriodID = @PrevId
Which inserts all the heading children appropriately. I can't seem to get the join syntax correct though to go down and do the same for the lines, closest i've got is this:
SELECT HNew.ID,L.NAME,
FROM LINE L
INNER JOIN HEADING H
ON L.HEADINGID = H.ID
INNER JOIN STATEMENT S
ON H.StatementID = s.ID
LEFT OUTER JOIN STATEMENT SNEW
ON S.TYPECODE = SNEW.TYPECODE AND SNEW.PeriodID = @NewId
LEFT OUTER JOIN HEADING HNew
ON HNew.StatementID = SNEW.ID
WHERE F.PeriodId = @OldId
This returns too many records. I know my join has gone wrong somewhere, but i can't see it... 
any help would be appreciated.
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What are some of the rows in the STATEMENT table?
----------
There go my people. I must find out where they are going so I can lead them.
- Alexander Ledru-Rollin
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I spent some time on this today, and i don't think the kind of query i want is possible with the current table structure, but thanks for looking...
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Hi all,
I need a sql statement that returns all my Items and Categories from a database. I was thinking of using an inner join statement
SELECT tblCategories.CategoryID, tblCategories.CategoryName, tblCategoryItems.ItemID, tblCategoryItems.Item
FROM tblCategories INNER JOIN
tblNews ON tblCategories.CategoryID = tblCategoryItems.CategoryID
But this returned the category more then once.
This is how my current database looks like.
SQL table tblCategories have fiels (CategoryID, CategoryName)
SQL table tblCategoryItems have fields (ItemID, CategoryID, Item, Price, SellDate, Supplier Approved)
tblCategoryItems.CategoryID = tblCategories.CategoryID
I want to bind these to a datalist, with repeatcolumns=2.
Also each Item has to go under the Category. I must not display the same category more then once. For say there is 5 items for the Frozen Food category, I must display the Frozen Food category, and under that the 5 items.
Need something like this:
Row 1, Column 1 "Frozen Food" with Items "Mince, Chicken"
Row 1, Column 2 "Vegatables" with Items "Carrots, Brocolli"
Row 2, Column 1 "Fruit" with Items "Apples, Peaches, Bananas"
Row 2, Column 2 "Dairy" with Items "Milk, Cheese"
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Relational databases don't act like that. You will need to process the returned data using a language like C# or VB, or a stored procedure.
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Hi!!
I'm trying to connect to a remote server using SQL Server Management Server. I'm from South Africa and the website is hosted in the States. We have 2 databases hosted there, apparently on the same server. I can connect to the one, but the other server keeps on telling me "Microsoft SQL Server, Error 53". It just fdoes not want to connect. I can connect from the website http://sql.glodns.net.
I need to export a list of users from the database to my boss, but I'm struggling to log in. I tried exporting the data from glodns but it won't work, it times out the whole time.
I desperately need help.
Regards,
ma se
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Hi!
Make sure that you are using TCP/IP as your network protocol. You can configure that using SQL Server's Client Configuration Tool (cliconfg) or by specifying the protocol in your connection string. In SQL 2005 you can specify the protocol when connecting using management studio.
As the server's admins for the correct IP port on which their server is listening. Default is 1433 - maybe they have changed it. It could also be possible that they block external access to their sql servers.
Last but not least make sure that the support sql server authentication. If they restrict access to windows authentication you will not succeed.
Regards,
Rainer.
Rainer Stropek
cubido business solutions gmbh
Email r.stropek@cubido.at
Visit my blog at http://www.cubido.at/Blog/tabid/176/BlogID/4/Default.aspx
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can u tell maximum length of
varchar()
nvarchar()
char()
nchar()
text
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Assuming SQL Server 2000
varchar(8000)
nvarchar(4000)
char(8000)
nchar(4000)
text = 2Gb
"On two occasions, I have been asked [by members of Parliament], 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question."
--Charles Babbage (1791-1871)
My: Website | Blog
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hi, i have a program that loads an MS Access in the program. i have a country combobox and a list of countries are there by me from the database. now .. i want that the user can enter a new country if he want to from a combobox. can this happen or can i do something else?? i have a country in another table apart from the contacts table.
help me please
Adrian De Battista: .Net Programmer, Java Programmer and Web Designer.
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i have 2 tables. TABLEA and TABLEB. the structures of both the tables are same. the columns are "branch_name" , "book_ISBN" and "book_name".
branch_name is the primary key in both the tables
the data in the tables are
TABLEA has data as
branch_name book_ISBN book_name
book1 123 vishu
book2 456 vishu
TABLEB has data as
branch_name book_ISBN book_name
book1 123 vishu
book2 567 vishu
as you can see, the 2nd row in both the tables has mismatch in "Book_ISBN" column.
i used a query to find the mismatch in data
SELECT A.branch_name,
CASE WHEN A.branch_name=B.branch_name THEN 'Y' ELSE 'N' END as "Comp_Branch",
A.book_ISBN,
CASE WHEN A.book_ISBN=B.book_ISBN THEN 'Y' ELSE 'N' END as "Comp_book_ISBN",
A.book_name,
CASE WHEN A.book_name=B.book_name THEN 'Y' ELSE 'N' END as "Comp_book_name"
FROM Tablea AS A
LEFT OUTER JOIN Tableb AS B ON A.branch_name = B.branch_name
the result came as
book1 Y 123 Y vishu Y
book2 Y 456 N vishu Y
which shows that "456" of TABLEA is not matching with "567" of TABLEB
now if i want that only the rows having "N" (means mismatch) should be displayed, then how to do this in the above comparison query ?
Please reply ASAP
Vishal
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You've got a number of options.
First of all, you could use the comparisons that are in your case statements as a where clause ...
WHERE<br />
A.branch_name<>B.branch_name<br />
OR A.book_ISBN<>B.book_ISBN<br />
OR A.book_name<>B.book_name
Or you could make your original query into an in-line table and select from it:
Select * FROM<br />
(<br />
SELECT A.branch_name,<br />
CASE WHEN A.branch_name=B.branch_name THEN 'Y' ELSE 'N' END as "Comp_Branch",<br />
A.book_ISBN, <br />
CASE WHEN A.book_ISBN=B.book_ISBN THEN 'Y' ELSE 'N' END as "Comp_book_ISBN",<br />
A.book_name,<br />
CASE WHEN A.book_name=B.book_name THEN 'Y' ELSE 'N' END as "Comp_book_name"<br />
FROM Tablea AS A<br />
LEFT OUTER JOIN Tableb AS B ON A.branch_name = B.branch_name<br />
) Comparison<br />
WHERE Comp_Branch = 'N' or Comp_book_ISBN = 'N' or Comp_book_name = 'N'
If you have multiple uses for this information, (e.g. sometimes you just want to see the comparisons where the ISBNs are different) then you may want to create a view from your original query and then select from the view:
Select * from COMPARISON_VIEW<br />
WHERE Comp_Branch = 'N' or Comp_book_ISBN = 'N' or Comp_book_name = 'N'
Jim Conigliaro
jconigliaro@ieee.org
-- modified at 8:11 Friday 19th May, 2006
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