Re: Database question - Database Discussion Boards

Re: ADO and 'Unhandled exception in <application> (MSDART.DLL) 0xC0000005: Access Violation'

KalliMan12-Aug-03 4:35

12-Aug-03 4:35

Hi Steve,
Thanks for your advice, but after 3 days search on net I could not find anything which may help me. I found that I'm not the first with this problem, too.
see 'http://forums.devshed.com/t36005/s.html'. Same problem, but no answer.
I cannot unload "MSDART.dll" before mine, because it's a SYSTEM dll.I have no access. (I get only ACCESS Violation Smile | :)

)) ). I just know its description: "Microsoft Data Access - OLE DB Runtime Routines". bla bla...
Has anybody some other Ideas?

a

Re: ADO and 'Unhandled exception in <application> (MSDART.DLL) 0xC0000005: Access Violation'

Steve S12-Aug-03 5:40

Steve S

12-Aug-03 5:40

In that case, I'd be tempted to get the XP symbols and get a proper callstack for this to see where it's occurring, like in your DllMain, your app's WinMain, or whatever.

I wasn't implying that YOU were unloading MSDART, just that it was being unloaded first.

As a hack you might try and add a method to your DLL that allows you to cleanup any or all of your objects before you unload the DLL (if you're unloading explicitly anyway, you can put a call in to do this at that point). That would help you tell if it's related.

Steve S

I thing, i found my solution.

KalliMan12-Aug-03 5:49

KalliMan

12-Aug-03 5:49

I thing, i found my solution.
Im my case the problem was, that I'm Using A Global DBManager's classes Variable,
from DLL which Load my DB DLL. Immediatly when I make it member in each class where used,
the problem DISAPPEAR,
Both DLL, are "implicted Linked"(i.e. export classes with (__declspec(dllimport))).
Strange, isn't it?

P.S. Avrything was Clear. Evrething was Released ... .
KalliMan.

a

I have an Error message, plz help

Exceter11-Aug-03 17:01

Exceter

11-Aug-03 17:01

Hi,
plz, help me with the following, (the code is attached)
Trying to insert, I have the following message:

(1 row(s) affected)

Server: Msg 8152, Level 16, State 9, Procedure Trig_PUD, Line 8
String or binary data would be truncated.
The statement has been terminated.

the Code is:

CREATE TABLE PersonalFile
(
IDnum int identity(1,1) not null,
PersonalFile varchar(10) not null
CONSTRAINT PK_PersonalFile
PRIMARY KEY
)

CREATE TABLE University
(
PersonalFile varchar(10) not null
CONSTRAINT PK_UniversityPF
PRIMARY KEY
REFERENCES PersonFile,
University varchar(50) not null
)

CREATE TABLE Department
(
PersonalFile varchar(10) not null
CONSTRAINT PK_DepartmentPF
PRIMARY KEY
REFERENCES PersonFile,
Department varchar(50) not null
)

CREATE VIEW PUD
AS
SELECT P.PersonalFile, U.University, D.Department
FROM PersonalFile P, University U, Department D
WHERE (P.PersonalFile = U.PersonalFile) and (P.PersonalFile = D.PersonalFile)

CREATE TRIGGER Trig_PUD ON PUD
INSTEAD OF INSERT
AS
BEGIN
INSERT INTO PersonalFile(PersonalFile)
SELECT PersonalFile
FROM inserted
INSERT INTO University(PersonalFile,University)
SELECT University, PersonalFile
FROM inserted
INSERT INTO Department(PersonalFile, Department)
SELECT PersonalFile, Department
FROM inserted
END

insert into PUD(PersonalFile, University, Department)
values('123445', 'Univerdity1', 'Department1')

Best Regards,
exceter.

Re: I have an Error message, plz help

Exceter11-Aug-03 17:49

Exceter

11-Aug-03 17:49

I found what the mistake was myself.
thanx anyway.
I hope you will answer my future questions.

Best Regards
exceter.

deanoA11-Aug-03 16:24

deanoA

11-Aug-03 16:24

what is print in sql server 2000?
I have the ff. code:

declare @CurrentDate datetime
set @CurrentDate = 2003/7/11
print @CurrentDate

The query returns:
Jan 27 1900 12:00AM
-----------------------------------------------
Is this returned value the same as the ones returned by a select statement?
What is this basically used for?

"To teach is to learn twice"

Database question

Grindorin11-Aug-03 14:23

Grindorin

11-Aug-03 14:23

Under SQL Server 2000, is it possible to review the transaction log for a specific database? If so, how?

Semper Fidelis

Re: Database question

Arjan Einbu12-Aug-03 10:23

Arjan Einbu

12-Aug-03 10:23

On http://www.mssqlcity.com/Articles/Undoc/SQL2000UndocDBCC.htm[^] I found this:

8. DBCC log
This command is used to view the transaction log for the specified database.

Syntax:
DBCC log ( {dbid|dbname}, [, type={-1|0|1|2|3|4}] )
PARAMETERS: 
   Dbid or dbname - Enter either the dbid or the name of the database
                    in question.

      type - is the type of output:

      0 - minimum information (operation, context, transaction id)

      1 - more information (plus flags, tags, row length, description)

      2 - very detailed information (plus object name, index name,
          page id, slot id)

      3 - full information about each operation

      4 - full information about each operation plus hexadecimal dump
          of the current transaction log's row.

     -1 - full information about each operation plus hexadecimal dump
          of the current transaction log's row, plus Checkpoint Begin,
          DB Version, Max XDESID

by default type = 0
To view the transaction log for the master database, run the following command:

DBCC log (master)

Also, there are some third-party tools that will let you look into, and manipulate db-logs...

Re: Database question

Grindorin13-Aug-03 14:18

Grindorin

13-Aug-03 14:18

This is what I needed.
Thank you for your help.

Semper Fidelis

Question: using multi-thread in ADO.Net & C#

yyf11-Aug-03 9:14

yyf

11-Aug-03 9:14

Hi all,

I am working on a tool to execute sql files(something like Query Analyzer) using ADO.Net & C#. I try to add a function which can cancel any executing queries. To achieve this, I think I need to use multi-thread. I want to create a thread to execute the sql, meanwhile, if user click the cancel button, then create another thread to stop it. I believe it can work, but because I am a very beginner in these(ADO.Net, C# & multi-thread ), I can not work it out now. Please help!

Thanks in advance!

Confused | :confused:

yyf

Re: Question: using multi-thread in ADO.Net & C#

Mike Dimmick11-Aug-03 11:23

Mike Dimmick

11-Aug-03 11:23

See SqlCommand.Cancel[^].

Hope this helps.

Database

Capper11-Aug-03 8:05

Capper

11-Aug-03 8:05

HELP

Can anybody help me with a short and simple guide on how to create an access 2000 database and being able to update it using .Net.

If we can start with a simple address book that somebody can or know of a site with help.

Anything will be appreciated.

Thanks

How do i access different databases

Venkatraman11-Aug-03 2:38

Venkatraman

11-Aug-03 2:38

Hey

How can i run a query which can be an insert/update query from one database referring another database.

For example

i need to insert a row in my database1.table1 from database2

thanks

Cheers,
Venkatraman Kalyanam
Bangalore - India

"Being Excellent is not a skill, it is an attitude"

Reality is an illusion caused by caffeine deficiency(one Microsoft Research scholor)

Re: How do i access different databases

Mike Dimmick11-Aug-03 3:59

Mike Dimmick

11-Aug-03 3:59

Is this

Two SQL Server databases on the same server instance
Two SQL Server databases on two different server instances
Not SQL Server at all?

If the first or second:

You can reference any object in SQL Server (table, view, function) by a full name: server.database.owner.object. The first three can be omitted when referencing an object in the same database as you're currently accessing; owner is typically only used to disambiguate where two users have an object with the same name, although functions require the owner part.

The simplest syntax for referring to an object in another database on the same server - say you wanted to access the titles table in the pubs database is pubs..titles (note the two dots, signifying that the owner of titles has been omitted).

If you want to refer to an object on another server, you need to set up a linked server, which you can do in Enterprise Manager, under Security > Linked Servers.

I believe Access has the concept of foreign tables.

Deleted RowState and the XmlDataDocument...

b33rdy11-Aug-03 0:31

b33rdy

11-Aug-03 0:31

Hi,

I'm retrieving the changes from a dataset and creating an XmlDataDocument
for transport to a web service, however any rows with a RowState of Deleted
don't get propagated to the XmlDataDocument...is there something that I'm missing?...

Any help would be appreciated as I'm slowly going out of my mind Confused | :confused:

.

Regards
Kieron

autonumbering index

Jerome Conus10-Aug-03 19:44

Jerome Conus

10-Aug-03 19:44

Hi !!

does anyone know how to do an autonumbering index when creating a new table with SQL ?

Thanks !
Jerome

Re: autonumbering index

ZoogieZork10-Aug-03 19:54

ZoogieZork

10-Aug-03 19:54

What SQL implementation are you using?

- Mike

Re: autonumbering index

Jerome Conus10-Aug-03 19:56

Jerome Conus

10-Aug-03 19:56

It will be crossdatabase : Access, MySQL, SQL Server and Oracle (and maybe some others)....

Re: autonumbering index

ZoogieZork10-Aug-03 20:15

ZoogieZork

10-Aug-03 20:15

As far as I know, every SQL implementation has a different way of making autoincrement columns, e.g., MySQL uses the AUTO_INCREMENT modifer, Oracle uses sequence objects, PostgreSQL uses the SERIAL type, SQL Server uses IDENTITY, etc.

- Mike

SQL SPs With Conditionals Based on Parameters

kcs9-Aug-03 17:44

kcs

9-Aug-03 17:44

These may be a stupid questions, but I have not been able to figure it out except for having a SPs that are slightly different.

Is it possible in a MS-SQL Server T-SQL Stored Procedure to do something like this pseudo code:

SELECT SUM(Amount) FROM Sales
if @StoreID > 0
then WHERE StoreID = @StoreID
else WHERE StoreID > 0

And also something like this, where @StoreID is a comma delimited list of StoreIDs

SELECT SUM(Amount) FROM Sales
if CAST(@StoreID as integer) > 0
then WHERE StoreID = @StoreID
else WHERE StoreID IN (@StoreID)

Note: My SELECT statements are much (much) more complicated than this. These where minimized for clarity.

Maybe I guess the real question is "even if I can do this, should I"? I am trying to minimize the business logic and the number of different SPs I have.

Thanks in advance,

Konstantine

Re: SQL SPs With Conditionals Based on Parameters

Mike Dimmick11-Aug-03 4:52

Mike Dimmick

11-Aug-03 4:52

The first can be done in a rather roundabout way:

SELECT SUM(Amount) 
FROM Sales
WHERE 
   StoreID > 0 AND 
   StoreID = 
      CASE
         WHEN @StoreID > 0 THEN @StoreID
         ELSE StoreID
      END

This basically works by comparing the StoreID in the table against itself when the variable @StoreID is not greater than 0 (always TRUE, unless you've got any NULLs in your data), as an extra filter clause. It's sometimes possible to exploit these conditions, but you should check the impact on the execution plan in Query Analyzer (it might cause an index to be rejected, leading SQL Server to read every row, killing your performance Big Grin | :-D

).

For the second one, I refer you to http://www.algonet.se/~sommar/arrays-in-sql.html[^] (link found from http://sqljunkies.com/weblog/[^]).

Re: SQL SPs With Conditionals Based on Parameters

kcs12-Aug-03 9:02

kcs

12-Aug-03 9:02

Mike,

Thanks for your reply.

That is a nice trick. I will give it a try and see how good/bad the performance works out.

Thanks for the links too. I search for a long time and never found anything nearly that useful.

Konstantine

SQL SUM()

Anonymous9-Aug-03 8:42

Anonymous

9-Aug-03 8:42

I am wondering if this is possible with one query?

I want to sum some values based off different customer id values,
for instance:

select sum(value1) as value1_total where customer = '1111'

but also sum(value1) where it equals a customer of '9999'

Thanks,

Chris

Re: SQL SUM()

Not Active9-Aug-03 13:28

Not Active

9-Aug-03 13:28

CREATE PROC up_MyTotal
@id INT
AS
select sum(value1) as value1_total where customer = @id

The call teh stored proc twice

Re: SQL SUM()

Arjan Einbu10-Aug-03 10:10

Arjan Einbu

10-Aug-03 10:10

SELECT customer, sum(value1)<br />
FROM my_table<br />
GROUP BY customer

SELECT customer, sum(value1)<br />
FROM my_table<br />
WHERE customer IN ('1111', '9999')<br />
GROUP BY customer

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