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In your DTS task (You do have a DTS task, don't you?!  ), issue a TRUNCATE TABLE command to delete all rows from the table, and then import the data.
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Reply to the forum, please!
Robby wrote:
i appreciate the information, but is there anyway you can give a code example? i have never created a table from a txt file, only standard SQL INSERT stuff. the file is pipe delimited and column names are on first row...any ideas?
Thanks,
Robby
- Open up SQL Server Enterprise Manager.
- Right-click on the target database, and choose
All Tasks -> Import Data. - For the source, choose
Text File, and select your text file. - Follow the instructions to set up the import.
- In the final screen, select
Scheduled DTS package for later execution, and click on the "..." button to set up the schedule.
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Hi,
We have a SQL database which has gone out to many users and has gone through
an evolved conversion process.
The problem I have is there is a field I need to alter but because it is set
to NOT NULL and has a default value for some users (the problem) sometimes
there is a constraint and sometimes not.
I can check for the constraint using "if exists" but sometimes I do not know
what the constraint is called as its name has been generated by SQL server
and contains a GUID.
Is there a simple clean way I can drop a column and constraints that apply
to it.
I know we are going to have to tidy the overall database up for these users
in the longer term but need a short term quick fix.
We are using MS-SQL server 7 and MS-SQL server 2000.
Thanks
Dave
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Hi!
I develop WIN32 software that uses MySQL database. My software uses MySQL
ODBC driver 3.51 and ADO interface. MDAC 2.7 is installed. My problem is
that while I'm trying to update MySQL record contained char(15) field, I get
an error "Microsoft OLE DB Provider for ODBC Drivers Multiple-step OLE DB
operation generated errors. Check each OLE DB status value, if available. No
work was done." I don't have such problem with numeric fields. The numeric
fields are updating normally with the same code.
Here is a sample of my code:
try
{
_RecordsetPtr pRecordset;
HRESULT hr;
_bstr_t btmp;
hr = pRecordset->Open(vTable, vConnection,adOpenForwardOnly,
adLockOptimistic, adCmdTableDirect);
hr = pRecordset->AddNew();
...
pRecordset->Fields->GetItem(L"id")->Value=btmp;
...
pRecordset->Fields->GetItem(L"proto")->Value=btmp;
...
pRecordset->Fields->GetItem(L"src_ip")->Value=btmp;
}
The fields "id" and "proto" are numeric, the field "src_ip" is char. And I
get the above error while updating the "src_ip" field. Do you have any
ideas? Can you help me?
Yours sincerely,
Alex Bash
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Hi,
I really need help with a major problem I have encountered. I'm trying to insert information into a SQL Server 2000 database using stored procedures. And each table that has a Primary Key (int) won't return a value using SELECT @@IDENTITY. The error states that ArtistID doesn't except null values and will not insert into table. Here's the source code for the stored procedure:
CREATE PROCEDURE ArtXchangeWeb.procManagerInsertArtist
@ArtistFName text,
@ArtistLName text,
@ArtistBirth text,
@ArtistDeath text,
@ArtistCountry text,
@ArtistNationality text,
@ArtistMovement text,
@ArtistBio text,
@ArtistPhoto varchar(255)
AS
BEGIN
INSERT INTO Artist(ArtistFName, ArtistLName, ArtistBirth, ArtistDeath, ArtistCountry, ArtistNationality,
ArtistMovement, ArtistBio, ArtistPhoto)
VALUES(@ArtistFName, @ArtistLName, @ArtistBirth, @ArtistDeath, @ArtistCountry, @ArtistNationality, @ArtistMovement, @ArtistBio, @ArtistPhoto)
/* Return the ID of the new artist */
SELECT @@IDENTITY
END
GO
If it doesn't give me the previous error it gives me a Input String not the right type error. Here's the code behind .vb:
If IsPostBack Then
'Save the new product to the database
With cmdManagerInsertArtist
.Parameters("@ArtistFName").Value = txtFName.Text()
.Parameters("@ArtistLName").Value = txtLName.Text()
.Parameters("@ArtistBirth").Value = txtBirth.Text()
.Parameters("@ArtistDeath").Value = txtDeath.Text()
.Parameters("@ArtistCountry").Value = ddlCountry.SelectedItem.Text
.Parameters("@ArtistMovement").Value = ddlMovement.SelectedItem.Text
.Parameters("@ArtistNationality").Value = ddlNationality.SelectedItem.Text
.Parameters("@ArtistBio").Value = txtBio.Text()
.Parameters("@ArtistPhoto").Value = txtArtistImg.Text()
cnn.Open()
Session("ArtistID") = .ExecuteScalar
cnn.Close()
'And redirect to the management page
Server.Transfer("ManageArtist.aspx")
End With
If you can help me out that would be greatful. I wouldn't be a programmer if it wasn't for sites like yours and I've searched around for answer to my problem and to no avail I'm still stuck in the same spot. I hope you can help me.
Thanks,
Gregory Foreman
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Can you send us the table definition? It seems that the ArtistID column is not an IDENTITY column.. Could you check it?
Another tip: MS does not recommend you to use the @@IDENTITY for this, because it has a nasty definition that causes some weird bugs with triggers. Always use the SCOPE_IDENTITY() function.
Q261186 - Computer Randomly Plays Classical Music
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Yes, the ArtistId can't be an IDENTITY column if that message appears.
He should also consider using a different datatype than the all-mighty "text" for his input parameters.
Morty
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Yeah.. and that sort of sucks because that specific type is (sometimes?) transferred differently than normal SQL statements/types in order to handle the large amount of data it MIGHT contain. (2 147 483 647 bytes to be exact) 
Morty
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I have a form that binds controls to a dataset. Some of the fields in the dataset are date fields, so I am using DateTimePicker controls to display (and allow editing of) these fields.
However, the date field in question can be null. When this occurs navigation through the records in the dataset is stopped, that is setting the Position property on the BindingContext does not update the controls.
Is there a workaround that allows binding to null dates?
Derek Lakin.
I wish I was what I thought I was when I wished I was what I am.
Salamander Software Ltd.
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Ok so I am using a SqlDataReader in ADO.NET because I do not want or need the overhead of a DataSet.
But now I have just realised I cannot figure out how to get a row count from the reader without actually looping through it, which bites because I need the rowcount before I loop so that I can initialise a collection array. Doh.
DOTNET247 seems to say that there is no way other than either looping through or using horrid SQL count statements.
So anybody got a magic bullet? Or should I just bite the bullet and do that SQL count?
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Do the SQL method... This bit me too 
[Edit] From what I rememebr, the fact that the datareader does not have a record count property stems from the fact that it realy contains NO records. It is more of a forward only conduit to the data. Not sure if that is true, but it certainly makes sense [/Edit]
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You can't, because it's a forward-only cursor.
Paul Watson wrote:
But now I have just realised I cannot figure out how to get a row count from the reader without actually looping through it, which bites because I need the rowcount before I loop so that I can initialise a collection array. Doh.
You can create an ArrayList and, at the end, use the ArrayList.CopyTo method for copying it to typed array.
Since this will only copy object references, not the actual values, it's very fast. Normally much, much faster than a SQL count.
Q261186 - Computer Randomly Plays Classical Music
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Daniel Turini wrote:
You can't, because it's a forward-only cursor.
I know, was hoping someone had some trick up their sleave 
Daniel Turini wrote:
Since this will only copy object references, not the actual values, it's very fast. Normally much, much faster than a SQL count.
Great idea, thanks Daniel.
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If you had used an SQL COUNT() function before you retrieved the it probably wouldn't be accurate either (atleast not in a multiuser enviornment), unless it's run in a serializable transaction.
The SqlDataReader streams the data and will reflect all the changes in the database until the data has passed through the reader. So records could easily be added or deleted after the count was issued and while the reader is processing.
Morty
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Morten Abrahamsen wrote:
If you had used an SQL COUNT() function before you retrieved the it probably wouldn't be accurate either (atleast not in a multiuser enviornment), unless it's run in a serializable transaction.
Nice point
Morten Abrahamsen wrote:
The SqlDataReader streams the data and will reflect all the changes in the database until the data has passed through the reader. So records could easily be added or deleted after the count was issued and while the reader is processing.
This is not true: The .NET framework does not provides support for server-side cursors, only client-side cursors. This way, only deleted records would be noticed by SqlDataReader.
Q261186 - Computer Randomly Plays Classical Music
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What do you base this on ?
AFAIK, the data is streamed directly from the server, and even though it doesn't utilize server-side cursors it doesn't precalculate the entire dataset (it's streamed ... standard SQL Server dataset processing...). So if records are appended during the read it should be reflected.
However I could be wrong, so if you have any docs / references please post them
.NET SDK:
Changes made to a resultset by another process or thread while data is being read may be visible to the user of the SqlDataReader. However, the precise behavior is timing dependent.
Morty
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Well... the SqlDataReader is by no means a client side cursor... it's simply a TDS parser. That's what the dataset is for
Would be cool to check out the theory though... (how much locking does the TDS generator really support...) but as usual, I would probably never find the time.
Morty
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Morten Abrahamsen wrote:
Well... the SqlDataReader is by no means a client side cursor... it's simply a TDS parser. That's what the dataset is for
Well, if it is a TDS parser it should be pretty fast! I think you're right, but some Anakrino hacking may solve this issue
Q261186 - Computer Randomly Plays Classical Music
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Hehe... been there
However, this is not an issue dependant on the .NET SQL Client layer.
It's a question of how the SQL Server handles standard query processing.
If you issue a select query with a 100.000 record resultset, it would be returned as a datastream (TDS) to the client.
I would think that if there is no isolation (tx) there would just be a read lock on the current row (or index key) and not on the table, so records could easily be added or deleted. So if I'm correct the SQL Server would just read the data page by page and never precalculate the total amount and lock it. Hence the "imagined resultset" could be radically (add/delete) changed during the processing (which could take time), and a prior Count would be useless.
Just my 2c
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I deduced the inserts would not be visible and deletes would by this: what would happen with a forward only cursor if I do a SELECT ... ORDER BY table_field and someone inserts data before my current cursor position?
Q261186 - Computer Randomly Plays Classical Music
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I agree. If you do an order by and that order by is not the clustered index SQL Server would have to preprocess the entire dataset. (meaning the keys .. not necessarily the data).
However, it would be interesting to see what happens if you don't use a postprocessing instruction. (ORDER BY, GROUP BY, UNION, DISTINCT etc)
Morty
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Hi I have the following table schema
Order(orderID, orderDate, creditCardNo, etc.....)
OrderedItem(OrderID(pk), ProductID(pk) )
Product(productId, productName ....etc.._
In access, when i delete the product from the Product table, if it is associated with a particular OrderedItem then i can not delete it, else i will be able to delete it.
However, I want to set it to ON DELETE SET NULL the ProductID in the OrderedItem
How will i do it?
Thanks
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Hi,
I am trying to access password and aliases or for that matter every thing related to microsoft exchange users i am able to retrieve only usernames using mapi.session object,
Please help in retrieving other things if any body has code plesae post it here.
I have tried using ADSI also.
Thanks,
Amit Gupta
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