I have an application that I have written that uses a sql server database running under MSDE 2000 on a 2003 server.
The application consists of many exe's that may run simultaneously and each of the exe's has a connection to the database.
Example, if I have 50 concurrent users using the system, that could actually be 150 actual connections to the database.
So, how many concurrent connections can the MSDE handle?
thanks
Jon
basically, is it inefficient to open and close a data connection everytime data needs to be retrieved or is there a way for a user to use the same conenction over multiple pages orfor multiple users to share one global data connection I just wanted to know this before I built a site where data could be constantly being pulled or put into the database.It would be easier to just keep opening and closing the connection since it just means pasting in the small chunk of code I use to do that where I need it. I hear speak of connections sometimes not closing etc and wonder if that is an issue then if you are opening and closing too many of them. I am using SqlConnection SqlCommand and SqlDatareader , my code works, just wondering if my approach lacked scalability before I find out too late and have to rewrite everything . Jim
View 11 Replies View RelatedHi, can anyone tell me whats the maximum number of connections you can have to MSDE? Eg, is it enough to host an intranet site for a relativly small business?
View 2 Replies View RelatedI'm using Visual Studio.Net enviroment, i have SQL desktop Engine installed and everything is working great. I have a problem that whenever i create a new database connections i can NOT delete it. I know that i have to select the node containing the connection and then press the DEL Key, but it seems that the delete option is not valid!
Any Suggestion?
I always thought that MSDE supported up to 5 concurrent connections. However, I was just at Microsoft's Web site and it says that MSDE supports *25* concurrent connections:
http://www.microsoft.com/sql/msde/downloads/download.asp
There's a big difference between 5 connections and 25. Did MS just release a new version of MSDE? Is there a catch?
Hi all,
I have 2 pcs connected each other and one has the MSDE installed, i would like to access PC1 MSDE instance remotly is this possible or MSDE couldn't be used in network environment and just locally?
TIA
Tiago Teixeira
Hi
I'm using service broker and keep getting errors in the log even though everythig is working as expected
SQL Server 2005
Two databases
Two end points - 1 in each database
Two stored procedures:
SP1 is activated when a message enters the sending queue. it insert a new row in a table
SP2 is activated when a response is sent from the receiving queue. it cleans up the sending queue.
I have a table with an update trigger
In that trigger, if the updted row meets a certain condition a dialogue is created and a message is sent to the sending queue.
I know that SP1 and SP2 are behaving properly because i get the expected result.
Sp1 is inserteding the expected data in the table
SP2 is cleaning up the sending queue.
In the Sql Server log however i'm getting errors on both of the stored procs.
error #1
The activated proc <SP 1 Name> running on queue Applications.dbo.ffreceiverQueue output the following: 'The conversation handle is missing. Specify a conversation handle.'
error #2
The activated proc <SP 2 Name> running on queue ADAPT_APP.dbo.ffsenderQueue output the following: 'The conversation handle is missing. Specify a conversation handle.'
I would appreceiate anybody's help into why i'm getting this. have i set up the stored procs in correctly?
i can provide code of the stored procs if that helps.
thanks.
We have implemented our service broker architecture using conversation handle reuse per MS/Remus's recommendations. We have all of the sudden started receiving the conversation handle not found errors in the sql log every hour or so (which makes perfect sense considering the dialog timer is set for 1 hour). My question is...is this expected behavior when you have employed conversation recycling? Should you expect to see these messages pop up every hour, but the logic in the queuing proc says to retry after deleting from your conversation handle table so the messages is enqueued as expected?
Second question...i think i know why we were not receiving these errors before and wanted to confirm this theory as well. In the queuing proc I was not initializing the variable @Counter to 0 so when it came down to the retry logic it could not add 1 to null so was never entering that part of the code...I am guessing with this set up it would actually output the error to the application calling the queueing proc and NOT into the SQL error logs...is this a correct assumption?
I have attached an example of one of the queuing procs below:
Code Block
DECLARE @conversationHandle UNIQUEIDENTIFIER,
@err int,
@counter int,
@DialogTimeOut int,
@Message nvarchar(max),
@SendType int,
@ConversationID uniqueidentifier
select @Counter = 0 -- THIS PART VERY IMPORTANT LOL :)
select @DialogTimeOut = Value
from dbo.tConfiguration with (nolock)
where keyvalue = 'ConversationEndpoints' and subvalue = 'DeleteAfterSec'
WHILE (1=1)
BEGIN
-- Lookup the current SPIDs handle
SELECT @conversationHandle = [handle] FROM tConversationSPID with (nolock)
WHERE spid = @@SPID and messagetype = 'TestQueueMsg';
IF @conversationHandle IS NULL
BEGIN
BEGIN DIALOG CONVERSATION @conversationHandle
FROM SERVICE [InitiatorQueue_SER]
TO SERVICE 'ReceiveTestQueue_SER'
ON CONTRACT [TestQueueMsg_CON]
WITH ENCRYPTION = OFF;
BEGIN CONVERSATION TIMER ( @conversationHandle )
TIMEOUT = @DialogTimeOut
-- insert the conversation in the association table
INSERT INTO tConversationSPID
([spid], MessageType,[handle])
VALUES
(@@SPID, 'TestQueueMsg', @conversationHandle);
SEND ON CONVERSATION @conversationHandle
MESSAGE TYPE [TestQueueMsg] (@Message)
END
ELSE IF @conversationHandle IS NOT NULL
BEGIN
SEND ON CONVERSATION @conversationHandle
MESSAGE TYPE [TestQueueMsg] (@Message)
END
SELECT @err = @@ERROR;
-- if succeeded, exit the loop now
IF (@err = 0)
BREAK;
SELECT @counter = @counter + 1;
IF @counter > 10
BEGIN
-- Refer to http://msdn2.microsoft.com/en-us/library/ms164086.aspx for severity levels
EXEC spLogMessageQueue 20002, 8, 'Failed to SEND on a conversation for more than 10 times. Error %i.'
BREAK;
END
-- We tried on the said conversation, but failed
-- remove the record from the association table, then
-- let the loop try again
DELETE FROM tConversationSPID
WHERE [spid] = @@SPID;
SELECT @conversationHandle = NULL;
END;
Hi there,
Here we have got a
asp.net application that was developed when database was
sitting on SQL server 6.5. Now client has moved all of their databases
to SQL server 2000. When the database was on 6.5 the previous
development team has used oledb connections all over. As the databases
have been moved to SQL server 2000 now i am in process of changing the
database connection part. As part of the process i have a login
authorization code.
Private Function Authenticate(ByVal username As String, ByVal password As String, ByRef results As NorisSetupLib.AuthorizationResult) As Boolean
Dim conn As IDbConnection = GetConnection()
Try
Dim cmd As IDbCommand = conn.CreateCommand()
Dim sql As String = "EDSConfirmUpdate" '"EDSConfirmUpdate""PswdConfirmation"
'Dim cmd As SqlCommand = New SqlCommand("sql", conn)
cmd.CommandText = sql
cmd.CommandType = CommandType.StoredProcedure
NorisHelpers.DBHelpers.AddParam(cmd, "@logon", username)
NorisHelpers.DBHelpers.AddParam(cmd, "@password", password)
conn.Open()
'Get string for return values
Dim ReturnValue As String = cmd.ExecuteScalar.ToString
'Split string into array
Dim Values() As String = ReturnValue.Split(";~".ToCharArray)
'If the return code is CONTINUE, all is well. Otherwise, collect the
'reason why the result failed and let the user know
If Values(0) = "CONTINUE" Then
Return True
Else
results.Result = Values(0)
'Make sure there is a message being returned
If Values.Length > 1 Then
results.Message = Values(2)
End If
Return False
End If
Catch ex As Exception
Throw ex
Finally
If (Not conn Is Nothing AndAlso conn.State = ConnectionState.Open) Then
conn.Close()
End If
End Try
End Function
''' -----------------------------------------------------------------------------
''' <summary>
''' Getting the Connection from the config file
''' </summary>
''' <returns>A connection object</returns>
''' <remarks>
''' This is the same for all of the data classes.
''' Reads a specific
connection string from the web.config file for the service, creates a
connection object and returns it as an IDbConnection.
''' </remarks>
''' -----------------------------------------------------------------------------
Private Function GetConnection() As IDbConnection
'Dim conn As IDbConnection = New System.Data.OleDb.OleDbConnection
Dim conn As IDbConnection = New System.Data.SqlClient.SqlConnection
conn.ConnectionString = NorisHelpers.DBHelpers.GetConnectionString(NorisHelpers.DBHelpers.COMMON)
Return conn
End Function
in the above GetConnection() method i
have commented out the .net dataprovider for oledb and changed it to
.net dataprovider for SQLconnection. this function works fine. But in
the authenticate method above at the line
Dim ReturnValue As String = cmd.ExecuteScalar.ToString
for some reason its throwing the below error.
Run-time exception thrown : System.Data.SqlClient.SqlException - @password is not a parameter for procedure EDSConfirmUpdate.
If i comment out the
Dim conn As IDbConnection = New System.Data.SqlClient.SqlConnection
and uncomment the .net oledb provider,
Dim conn As IDbConnection = New System.Data.OleDb.OleDbConnection
then it works fine.
I also have changed the webconfig file as below.
<!--<add
key="Common" value='User ID=**secret**;pwd=**secret**;Data
Source="ESMALLDB2K";Initial Catalog=cj_common;Auto
Translate=True;Persist Security Info=False;Provider="SQLOLEDB.1";'
/>-->
<add key="Common" value='User ID=**secret**;pwd=**secret**;Data Source="ESMALLDB2K";Initial Catalog=cj_common;' />
Please help. Thanks in advance.
Hello,
I'm not sure if it's the setup I did wrong, but I can't seem to get my
text datatype in my database to store more than 900 characters.
I'm trying to setup a news database for my website, which will populate
the information into a datagrid. To test, I manually added a news
item in the database through the visual studio 2003 gui. I
immediately noticed a problem as the I was getting an error after a
long news item saying:
"The value you entered is not consistent with the data type or length of the column, or over grid buffer limit."
I couldn't find anthing to set the buffer limit and the datatype is
"text" filled with simple text in the column. As a further test,
I
simply entered 12334567890123... up to 900 characters and still
recevied the error.
I would appreciate someone leading me in the right direction on this one.
Thanks a lot.
I am trying to change the computer name of a machine running MSDE but I get an error when SQL Server starts. With regular SQL when I change the name of a computer I re-run setup and setup fixes this problem. MSDE can only be installed from unattended mode so I can’t rerun setup and fix the problem.
My question is "How do I change the name of a computer running MSDE with out reinstalling MSDE"
We currently have the problem, that all our machines are produced with the
same name and afterwards the name is changed. So we have the problem that
the checksum key for the MSDE isn't valid anymore. As MSDE can only be installed
from unattended mode so I can’t rerun setup and fix the problem. Does anyone
know a solution for this problem ?? A program recalculating the cheksum ??
regards,
Manfred
I'm not sure if this is the correct forum for this this question but I'll give it a shot.
The only db development that I have ever done is in MS Access. I have a project at work that is being accomplished in VB and I need a db engine to use as the back end. Visual studio came with a copy of MSDE. Is this tool worth using or should I invest in mySQL? Are there any advantages to using MSDE over mySQL?
Just a quick question about connection management. My application willnever need more than 1 or 2 connections about at any given time. Also, I donot expect many users to be connected at any given time. For efficiency, Iwould like to keep connections alive throughout the lifetime of the objectsrequiring them, rather than opening a new connection, executing code andthen closing it again. What is the most efficient way of doing this?Should I perform the open/close or just one open when I create the objectand a close when I dispose of it?
View 1 Replies View RelatedDo I have other option beside using IF..ELSE IF? TIF
-- GET INFORMATION OF THE JOB
DECLARE @JOBIDAS Char(10)
DECLARE @VRUSERVICEHRSAS Decimal(18,2)
DECLARE @VRUSERVICEMINAS Decimal(18,2)
DECLARE @BILLEDFLATAS Decimal(18,2)
DECLARE @BILLREGRATEAS Decimal(18,2)
DECLARE @MIN_HRSAS Decimal(18,2)
DECLARE @COUNT_GREATER_MINTinyInt
DECLARE @COUNT_LESS_MINTinyInt
SET @VRUSERVICEMIN = 46
SET @BILLEDFLAT = 0
-- PROCESS ONLY RECORDS WHERE THERE IS NO FLAT FEE
IF @BILLEDFLAT = 0
BEGIN
IF @VRUSERVICEMIN BETWEEN 0 AND 15
BEGIN
SET @VRUSERVICEMIN = .25
END
ELSE IF @VRUSERVICEMIN = 15
BEGIN
SET @VRUSERVICEMIN = .25
END
ELSE IF @VRUSERVICEMIN BETWEEN 15 AND 30
BEGIN
SET @VRUSERVICEMIN = .5
END
ELSE IF @VRUSERVICEMIN = 30
BEGIN
SET @VRUSERVICEMIN = .5
END
ELSE IF @VRUSERVICEMIN BETWEEN 30 AND 45
BEGIN
SET @VRUSERVICEMIN = .75
END
ELSE IF @VRUSERVICEMIN = 45
BEGIN
SET @VRUSERVICEMIN = .75
END
ELSE IF @VRUSERVICEMIN > 45
BEGIN
SET @VRUSERVICEMIN = 1
END
END
PRINT @VRUSERVICEMIN
Is it possible to catch and error and then keep the process going in a stored procedure?
So if an update encounters a primary key violation on a row, is it possible to skip that row and keep the process going?
Hi! I have some try .. catch block trying to insert some data into database. During its action duplicate key row insert error could raise, for example. The question is how could I know distinguish it from other sql errors? Object ex (Catch ex As Exception) has only message property '{"Cannot insert duplicate key row in object 'dbo.Group_Courses' with unique index 'IX_Group_Courses'.The statement has been terminated."}' and type System.Data.SqlClient.SqlException. Knowing the type of error is not enough, because there are different SqlExceptions. Even the message is not unique for this error, because now i deal with 'dbo.Group_Courses' and then it could be other table. Is there something that unique identifies each error? For example error code. If it exists, where could I get it?
Thanks in advance!
I test my the now function and it is getting the right date. When I try to send that to the sql database I have it turns it into 1/1/1900. Does anyone know why this is happening, I have tried everything Here is my code:
sql = "Insert into tblguestbook(date, name, city, state, email, Url, Comments)Values ('"
sql = sql & Request.Form(Now) & "','"
sql = sql & Request.Form("nametxt") & "','"
sql = sql & Request.Form("citytxt") & "','"
sql = sql & Request.Form("statetxt") & "','"
sql = sql & Request.Form("emailtxt") & "','"
sql = sql & Request.Form("urltxt") & "','"
sql = sql & Request.Form("commentstxt") & "');"
Hi,
I have a table with one field set at nvarchar (4000)
This is sometimes not big enough and I get an error that the max row size has been reached.
How do people handle the error when the max row size is reached and gracefully inform the user?
Also, should I really be using Ntext instead, would this be better - is there a performance penalty?
Much obliged.
RG
Hi,
I would like to handle a sql error in t-sql and return a certain value in case error occurs. For example if I would like to add a record I want to return a certain identity value or maybe a status of transaction (0 for incomplete, 1 for succesfull trans).
If error occurs in sql I cannot return any values back to asp.net because of What I am doing at the moment is catching an error in asp.net and then displaying an error message. Is there a way to return only a return value to asp.net and somehow handle the error in t-sql?
Thanks
I don't know what's wrong with SQL2000 setup, the problem is:
whenever I execute a query with a date/time such as 02/02/200,
SQL give me an error message saying that the date is "Out of Range".
Any ideas, thanks in advance.
I'm having trouble with something and I was hoping that you could point me in the right direction.
Here's the scenario:
I have a VB application that clients use to add records to a SQK 2K DB. The info they have added that day is shown in a grid. They have the ability to edit items in the grid, and then update those changes to the database. The problem is that sometimes they change the values to something they shouldn't. To combat this I've started experimenting with check constraints. In query analyzer I test the constraint by trying to update an entry to an 'illegal' value. When I do this, I get an error saying: "Server: Msg 547, Level 16, State 1, Line 1" and the change is not made. What I'd like to do is to give the user a dialog box notifying him of the error. Is there a way to have a sub-routine or stored procedure be triggered when a message of this type is generated?
My specs are: W2K pro clients, SQL2K on an NT4 sp6a server. Application is written in VB6.
Any help is greatly appreciated.
thanks,
-scott
I have a select statement that works, but I know there has to be a better
way( I apologize for being TSQL brain dead today). Here is the statement
SELECT PATIENT_ACPT_STATUS, DISP_NOTES, RECORD_ID, modified_by, last_name, ddate
FROM PATIENT_MEDICATION_DISPERSAL_
Where (ddate = convert(char(10),getdate(),101) and
(MODIFIED_BY = CURRENT_USER) and
rec_status = 1) or
(ddate = convert(char(10),getdate(),101) and
(PATIENT_ACPT_STATUS = 1)) OR
(ddate = convert(char(10),getdate(),101) and
(MODIFIED_BY = 'open'))
Hi All,
We have got a new HP server and SQL is preinstalled, But when we are trying to start SQL, it gives an error "The handle is invalid".
We tried to reinstall the SQL, but , being a server t doesn't allow to do so
Please assist.
regards,
Jatin
I have a need when a Update, Insert or Delete is done to a record in DB "A", it will send the appropriate UID to a different table in different DB "B".
My first thought was to have a trigger on the table in DB "A" simply call a stored procedure on DB "B" and do the UID.
However - my question is what is the best approach and what's the best way to establish the connection to DB "B" for the UID from within DB "A"? We can't use linked servers - DNSLESS string would be the preferred connect way. Not sure how to execute it within a trigger.
Is even using a Trigger to Stored Proc the best way?
What about Transaction Replication - which I've never attempted - is that a better way?
Just looking for some guidance here so I don't needlessly burn time down a path that isn't recommended or simply won't work.
Thanks as always for your input,
Peter
Hi,
I build a local cube from a relation database. In the database there are 1:n relations.
Is there a way to handle 1:n relations?
For example:
I have a table LOGGEDFLAW and a table LOGGEDREASON with a 1:n relation between them. We create a select statement of these tables and as an result we get duplicate records of LOGGEDFLAW each time more than 1 record of LOGGEDREASON are associated to 1 record of LOGGEDFLAW - this is the standard result I get with an relational JOIN operation. Now I want to count the LOGGEDFLAWs without the duplicates generated by the 1:n relationship.
Best regards,
Thorsten
Hi All,
Please help me out how to implement the locking in below scenario
Req -
There are two tables Table1 & Table2
If I will insert in table1 then related data fields will be auto updated in table2 , similarly based on the data in table2 table1 data needs to be updated.
Now the sync of table1 & table2 is working fine.
My prob is we are handling the updation/insertion from the UI screens . Two separate screen for each table. When we have multiple user accessing the screens say - User1 updates table1 and User2 updates table2 then we need to implement the locking so that at one time one screen will allow updation in the table1 and hence table2.
The other screen shouldnt allow updation in table2 and hence in table1.
This is very common locking functionality ...but am not getting any way to implement it , Please advise.
Srain.
I have a friend who is doing a voting application for one of his customers and they are concerned about the volume that sql server can handle. He's looking a single sql server 2005 with plenty of hd space and 4gb of memory. The app will look to see if you voted and then insert a record accordingly.
Are there any papers out there or apps that can show the amount a server can handle?
thanks.
I already asked this question; however, I am giving all the detailsnow:We get large files(millions of records) and we need to load it into ourtables using import export wizard. Some of the fields in the file canbe Null and so we are forced to create table with fields that allowNulls with default ''. However when we insert data into these tablesit puts Null in those fields even though we have a default '' (I do notthink we have any work around for that; do we?)Finally we need to go through each field and update it to '' if it is aNull and that takes LOT OF TIME.If (select count (*) from <tablename> where <columname> is Null) >0BeginUpdate <tablename>set <columnName> = ''where <columnName> is NullendPlease let me know if there are any work arounds for this crisis ?Thank you very much in advance!
View 1 Replies View RelatedI need to know if there is a better way to construct this SQL statement.(Error handling is omitted)MS SQL Server 2000Insert into FSSUTmpSelect a.acct_no, a.ac_nm, a.ac_type, 10, -1,-1 * sum(CHARINDEX(convert(char(4), b.post_yr), @post_yr) * CHARINDEX('-',CONVERT(char(2), b.post_prd - @post_prd - 1)) * b.prd_trn_amt),-1 * sum(CHARINDEX(convert(char(4), b.post_yr), @post_yr) * CHARINDEX('0',CONVERT(char(1), b.post_prd)) * b.prd_trn_amt)FROM GLAccounts a, GLBalances bWHERE b.cmpny_cd = a.cmpny_cdAND b.acct_no = a.acct_noAND a.cmpny_cd = @cmpny_cdAND ac_ctrl_type between '200' and '219'Group by a.acct_no, a.ac_nm, a.ac_typeThe part I’m wondering about is the 2 sum sections.The GLBalances table has following important fields:Post_yr -- the posting yearPost_prd – the posting periodPrd_trn_amt – The beginning balances if the period is 0, or the nettransactions for periods 1 through 12.The first sum gives the current balance as of the period @post_prd by addingall of the periods from 0 to @post-prdThe second sum is just the beginning balance.It is doing a conditional sum by using CHARINDEX to be 0 if the recordshould not be added and 1 if it should.There is a problem as it stands when you are looking for the balances whenthe @post_prd is 9 or greater because “b.post_prd - @post_prd – 1” willbe –10 or smaller. Then the CONVERT(char(2) ….. is an error, so CHARINDEXis 0 when it needs to be 1.I can fix that by using SIGN and it will work fine. What I what to know, isthere a better way to populate the table, where one of the values is aconditional sum?This is a STORED PROCEDURE from a commercial product, so I can’t changeanything else other than the STORED PROCEDURE.
View 1 Replies View RelatedHi,What exactly does the above (subject) error mean? I'm getting it from anadp file when used by a few people at the same time (each user has thefile in their own filespace though). Access is through windowsauthentication and it only seemed to occur during an update of aspecific table.. The problem is it didn't happen to everyone and Ican't recreate it at all on my own, so am wondering if it was somethingto do with the level of traffic to/from the server at that specific time.Any clues?Cheers,Chris
View 4 Replies View RelatedDoes anyone knows of a tool that will help me manage my queries? I have 100's of them and all scattered. On my PC at home, some in my laptop, some of them at work, some in memory sticks. Then, when I need them I can't find the one I'm looking for so I end up writing the query again.
Any ideas?
Hello
I am developing a smart device application using Visual Studio 2005 and SQL Server Compact Edition.
Since we cannot write stored procedures, functions, views what is the best way to write/read to/from the database tables other than writing inline sql.
Any ideas and suggestions regarding this would be helpful.
Thanks