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Hi guys...I do not know whether it is right platform to ask the question. Suppose I update databse on my laptop. Now I want the same database on another location, to be updated automatically...obviously wirelessly. How to do that??
modified on Monday, January 4, 2010 1:35 PM
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Hi,
It will likely depend on the database you are using. Also, is this connected at the same time, or do you mean to have the database on your laptop updated, then when you connect to the other location, it updates at that time?
Two main ways:
1) Replication - Review this in your db documentation and return if you have further questions.
2) Do it yourself in code - code your app to send the changes when you connect the the remote database.
Thanks.
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There is Server1, Server2..... Server2 is nearer than Server1 at some location, to my device. Server2 is selected and the changes are written to the database on it. Now after this, changes should be automatically written to the Server1......hope made it clear to you. Having said this I"ll use your first suggestion.....Replication
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What happens to the updates if your wifi connection is down?
What happens when there are 2 or more local databases?
This is a really bad design. If you are working offline (local database) then you need to implement a replication strategy. This involves more than just shoving data back and forth.
Never underestimate the power of human stupidity
RAH
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Ans#1: what happens if your nearest ATM is not working well. You will have to wait untill it is fixed.
Ans#2: In case of 2 or more local DBs, nearest one will be selected to be updated.
Apart from this...im a student so any stupidity is hopefully forgiven 
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Muzammil Saeed wrote: Apart from this...im a student so any stupidity is hopefully forgiven
Absolutely
This is not necessarily stupid, just part of the learning process, what sort of system are you trying to design you have completely confused me with ATM, wireless and nearest database.
Never underestimate the power of human stupidity
RAH
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There is Server1, Server2..... Server2 is nearer than Server1 at some location, to my device.Hence Server2 is selected and the changes are written to the database on it. Now after this, changes should be automatically written to the Server1......hope made it clear to you
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Hello
I work with sqlserver2005 express ,I try to populate my table student by:
the first field data by the first column of an excel file.
other field by 123.12 ...
My code is
INSERT INTO student (Ch1, ch2, ch3)<br />
SELECT ch1, 123 AS ch2, 124 AS ch3<br />
FROM OPENROWSET('Microsoft.Jet.OLEDB.4.0',<br />
'Excel 8.0;Database=C:\test\xltest.xls', [Feuil1$])
but i have this mesage :
Unable to initialize the object from the data source OLE DB provider "Microsoft.Jet.OLEDB.4.0" for linked server "(null)".
Thanks
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I am using the following ocde to loop through existign records and create account summart record for every client but it seems looping with no end and it's creating an endless account summary records for the first client only.. what's wrong?
USE takhlees
SET ANSI_NULLS ON
SET QUOTED_IDENTIFIER ON
SET NOCOUNT ON
DELETE FROM accounts_summary
-- reset primary key
INSERT INTO accounts_summary (account_number, account_name, core_account, is_read_only) VALUES (10000000001, 'CASH', 'True', 'True')
INSERT INTO accounts_summary (account_number, account_name, core_account, is_read_only) VALUES (10000000002, 'ACCOUNTS RECEIVABLE', 'True', 'True')
DECLARE @client_id int, @client_cpr varchar(50), @client_name varchar(255), @account_number_string VARCHAR(50), @account_number numeric(38,0)
DECLARE account_numbers CURSOR FOR
SELECT clients.client_id, clients.client_cpr, clients.client_name
FROM clients
ORDER BY clients.client_name
OPEN account_numbers
FETCH NEXT FROM account_numbers INTO @client_id, @client_cpr, @client_name
WHILE @@FETCH_STATUS = 0
BEGIN
INSERT INTO accounts_summary (client_category, client_id, cr_cpr_number, account_number, account_name) VALUES ('I', @client_id, @client_cpr, SCOPE_IDENTITY(), @client_name)
-- get random from 1 to 7
SET @account_number_string = RIGHT('0' + convert(varchar(1), DATEPART(WEEKDAY, GETDATE())), 1)
-- get random from 1 to 365
SET @account_number_string = @account_number_string + RIGHT('000' + convert(varchar(3), DATEPART(DAYOFYEAR, GETDATE())), 3)
SET @account_number_string = @account_number_string + RIGHT('0000000' + convert(varchar(7), SCOPE_IDENTITY()), 7)
SET @account_number = convert(bigint, @account_number_string)
UPDATE accounts_summary SET account_number = @account_number WHERE account_id = SCOPE_IDENTITY()
UPDATE clients SET account_number = @account_number WHERE client_id = @client_id
FETCH NEXT FROM account_numbers INTO @client_id, @client_cpr, @client_name
END
CLOSE account_numbers
DEALLOCATE account_numbers
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does it have anything to do with this:
WHILE @@FETCH_STATUS = 0
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DECLARE @rec_id int, @client_id int, @client_cpr varchar(50), @client_name varchar(255), @account_number_string VARCHAR(50), @account_number numeric(38,0)
DECLARE account_numbers CURSOR FOR
SELECT clients.client_id, clients.client_cpr, clients.client_name
FROM clients
ORDER BY clients.client_name
OPEN account_numbers
FETCH NEXT FROM account_numbers INTO @client_id, @client_cpr, @client_name
WHILE @@FETCH_STATUS = 0
BEGIN
INSERT INTO accounts_summary (client_category, client_id, cr_cpr_number, account_number, account_name) VALUES ('I', @client_id, @client_cpr, 0, @client_name)
SET @rec_id = SCOPE_IDENTITY()
-- get random from 1 to 7
SET @account_number_string = RIGHT('0' + convert(varchar(1), DATEPART(WEEKDAY, GETDATE())), 1)
-- get random from 1 to 365
SET @account_number_string = @account_number_string + RIGHT('000' + convert(varchar(3), DATEPART(DAYOFYEAR, GETDATE())), 3)
SET @account_number_string = @account_number_string + RIGHT('0000000' + convert(varchar(7), @rec_id), 7)
SET @account_number = convert(bigint, @account_number_string)
UPDATE accounts_summary SET account_number = @account_number WHERE account_id = @rec_id
UPDATE clients SET account_number = @account_number WHERE client_id = @client_id
FETCH NEXT FROM account_numbers INTO @client_id, @client_cpr, @client_name
END
CLOSE account_numbers
DEALLOCATE account_numbers
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Dammed if I can see any problem with your cursor. Try breaking it down to just print the @client_id for each loop to make sure it is performing correctly.
I have an issue with you using the @account_number as a FK between client and account. You should be using the @rec_id as the FK on the client table. Keys should be stupid, you know no intelligence and you are using a formatted string as the key instead of the identity value - bad design!
Never underestimate the power of human stupidity
RAH
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i did PRINT and it's just printing one record# 25
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Try just this
DECLARE account_numbers CURSOR FOR
SELECT clients.client_id, clients.client_cpr, clients.client_name
FROM clients
ORDER BY clients.client_name
OPEN account_numbers
FETCH NEXT FROM account_numbers INTO @client_id, @client_cpr, @client_name
WHILE @@FETCH_STATUS = 0
BEGIN
PRINT @Client_ID
FETCH NEXT FROM account_numbers INTO @client_id, @client_cpr, @client_name
END
CLOSE account_numbers
DEALLOCATE account_numbers
Also make sure your select statement is returning what you think.
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I've had problems with cursors not working correctly, or, telling me the cursor is already open.
Can you change from using a cursor to using a temporary table or table variable?
Insert the select data with an identity field into the temporary table/table variable and
then create a loop to process each record.
Hope it helps.
Tim
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Could it possibly have anything to do with using GETDATE() to construct 'random' portions of the string? Each pass through the loop will render the same values until the server system clock flips to the next day. It seems to me you will always get the exact same value for each pass of the loop until the next day arrives. I also don't understand your use of the RIGHT() function, perhaps it is some odd way of padding with 0's. In each case it seems you concatenate 000's + some value and then pull the 'some value' you just concatenated from the 000's; why not just use the values themselves and not clutter it up by concatenating the 000's and values together only to turn around and take the values off? If you need to pad try using the REPLICATE() function, as it will be easier to read:
DECLARE @hold varchar(50)
SET @hold = convert(varchar(7), SCOPE_IDENTITY()) -- or @recid
SET @hold = REPLICATE('0', 7 - LEN(@hold)) + @hold -- pad to desired length of 7
-- REPLICATE('0', 0) does not produce an error
Also if you truly need to get a random value try using the NEWID() function which will return a random GUID.
Hold on a second here... Don't you think you might be putting the horse ahead of the cart?
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I tried to debug a stored procedue in VS 2005 as mention in this^link.
Howver, when I tried to select, 'Step into Stored Procedure', I am getting an message in the output window saying that ' Cancelled by User'. Not sure what is happening. Any idea?
I even tried to give admin rights by executing the sp_addsrvrolemember sp in master db. This returns the message, 'Command(s) completed successfully'. Hope it has given the admin rights.
But still I am getting the same message as above, not able to debug the stored procedure. Any idea what is happening? I am using VS 2008.
Thanks
meeram395
Success is the good fortune that comes from aspiration, desperation, perspiration and inspiration.
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I got the fix. I don't have the rdbgsetup.exe in 1033 folder, even though 1033 folder is present. Do I need to reinstall this or is it available for free download from net? I tried in google, but didn't get anything such.
Success is the good fortune that comes from aspiration, desperation, perspiration and inspiration.
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Hi all,
I want a trick as to how to add multiple values for a single value .
For example :
A Person named "A" has two cars "Car1" , "Car2"
How do I design the database for this ??
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You have a table Person keyed say on PersonId.
You also have a table Car, keyed on CarId. Also in this table you have a PersonId fogeign key to the first table.
Each Person can then own multiple cars, and to see which you need to do a query with a 'join'.
Regards,
Rob Philpott.
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Hello,
Rob Philpott has the right idea. Do not forget to index the combination table.
If you want to have only one table then I would suggest having an ID, Person, and Car columns that way the ID could be your primary key and you could have an index on the person column and one on the car column.
However, Rob's way is the proper way to setup a database.
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I think Rob's idea is better as it is easy to handle, rather than to make All-in-One table. There is really a basic databse rule invloved here that we should make another table for the multi-valued attributes. Parent table's primary key will be foriegn in the newly made table.
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<quote>
"When inserting or updating via proc that it is a good practice to return the new or updated rec using output parameters."
Opinions - one way or the other - appreciated.
Thanks
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It really depends on how it is being used, and I personally use both techniques. I can't say I've read much on the benefits/pitfalls of each approach, but within T-SQL, I prefer the OUTPUT param simply to favor variable assignment rather than having a result set returned. If the stored procedure is being called from .NET, I usually SELECT out the record ID, and utilize the ExecuteScalar method of SqlCommand.
The T-SQL usage doesn't really favor one over the other (in terms of keystrokes):
EXECUTE StoredProc @Param1, @Param2, @RecordID OUTPUT
SET @RecordID = EXECUTE StoredProc @Param1, @Param2
OUTPUT Parameter:
If stored procedure is being called from within T-SQL.
If the new record ID is not always used by the caller.
SELECT Record ID:
If stored procedure is being called from .NET (use SqlCommmand.ExecuteScalar).
If the new record ID is always used by the caller.
If you do choose to take the OUTPUT parameter route, I would suggest you are careful about how you assign the new record ID to that OUTPUT parameter. If the stored proc is being called within a loop, you'll want to make sure the previous value does not remain in the output parameter (in the event that a record is not actually affected). You may also want to set the default value for that OUTPUT param as NULL so it is optional (in the event the caller does not require the record ID).
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Member 4501940 wrote: that it is a good practice to return the new or updated rec using output parameters.
Having multiple paths to Rome doesn't mean that one traderoute is the "bestest". Some paths are optimized for heavy traffic, while others are only accessible by horse.
It's a good practice to let the programmer decide what solution would fit best into the problem at hand. It might be quite acceptable to return the identity using a simple select statement 
I are Troll 
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