Database Discussion Boards

matjame12-Jul-07 20:22

12-Jul-07 20:22

Thatz what I said on there.If rs.EOF then

Unless there is someother rs.EOF that I forgot to change.But ive done that already and nothing.

kagiso

Re: Connection problem

Pete O'Hanlon12-Jul-07 22:49

Pete O'Hanlon

12-Jul-07 22:49

After Set r = c.Execute(strSQL) put r.MoveFirst. I seem to remember that there are some circumstances where you have to do this - although it's been a very long time since I've done ASP coding.

Plus, as was said above - it should be If r.EOF = False Then ...

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Re: Connection problem

matjame12-Jul-07 23:09

matjame

12-Jul-07 23:09

Thanx but still nothing.Im thinking it could be some settings on my ADO or something.Ive don all that u said and still nothing
I still get no values.

But anyways, thanx guys.As for ur link, it tells me thise website is not avaialable.I will try again.

kagiso

easy join question

blakey40412-Jul-07 2:43

blakey404

12-Jul-07 2:43

her is a simplified version of my problem...

2 tables...

CUSTOMER
customerId
...

ORDER
orderId
customerId
...

the relationship is clearly one (customer) to many (order)

i want to do a join which will only bring back firt order found.

so

select * from customer
inner join order on order.customerId = customer.customerId

but in my "bigger" query this brings back all orders for each customer. so do any outer joins.

IDEAS?

Thanks in advance

Anthony "having a thick day" Blake

Re: easy join question

Colin Angus Mackay12-Jul-07 2:46

Colin Angus Mackay

12-Jul-07 2:46

SELECT TOP 1 ...

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Re: easy join question

blakey40412-Jul-07 2:48

blakey404

12-Jul-07 2:48

just gives the first customer - i want the first order found for each customer

cheers

anthony

Re: easy join question

Pete O'Hanlon12-Jul-07 2:54

Pete O'Hanlon

12-Jul-07 2:54

You could always try this:

select * from customer
inner join order a on a.customerId = customer.customerId
and a.orderId = (SELECT First 1 b.orderID FROM order b WHERE b.customerID = customer.customerId)

It's not going to be the most efficient SQL ever, but it should do the trick.

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Re: easy join question

blakey40412-Jul-07 2:57

blakey404

12-Jul-07 2:57

i will try something like that... i think that it will make a difference in speed but the overall query i'm working on returns 100,000+ rows so i'll have to just try and find out. cheers.

Re: easy join question

DQNOK12-Jul-07 8:41

DQNOK

12-Jul-07 8:41

Rename your ORDER table to ORDERS since ORDER is a keyword (ORDER BY) that conflicts. I also took the liberty of renaming CUSTOMER to CUSTOMERS (since all table names should probably reflect a "plural" sense).

The key is to form a "virtual" orders table that only contains the first order for each customer, and then join it to the CUSTOMERS INNER JOIN ORDERS table to get the other fields you want while eliminating records you don't want. Using the vendor-specific TOP keyword should work, but a more standard SQL way might be:

SELECT * 
FROM       (ORDERS AS O
INNER JOIN CUSTOMERS AS C ON O.customerId = C.customerId)
INNER JOIN (SELECT customerId, MIN(orderId) AS M
            FROM ORDERS
            GROUP BY customerId) AS GB ON O.orderId = GB.M;

Assuming your orderId is incresing, this will give it to you. The GROUP BY is how to eliminate all the rows you don't want. HOWEVER, you'll notice that the output reproduces O.customerId, C.customerId, and GB.customerId, all of which are redundant. The only way I know to preventing listing them all is to spell-out the fields you want instead of using '*'.

Hope this helps.

David

Re: easy join question

blakey40413-Jul-07 0:29

blakey404

13-Jul-07 0:29

Thats great. Don't worry about the table names - they were hyperthetical - trust me postng the actual query wouldnt have provoked any response it's huge.

I want to Connect to MySql Server using .NET.

vikasviswan12-Jul-07 2:42

vikasviswan

12-Jul-07 2:42

I want to Connect to MySql Server using .NET but I dont have MySql client installed in my machine.
I am also connecting to SqlServer in my application using this Connection String

add name="localServer" connectionString="Data Source=
TRVWSPW001\SQLExpress;Initial Catalog=Dashboard;User Id=Dashboard_Users;Password=passw0rd@123;" providerName="System.Data.SqlClient"

Wat would be connection string to connect to MySql
i know these details Server name,database name,User id
Pwd

Re: I want to Connect to MySql Server using .NET.

blakey40412-Jul-07 2:46

blakey404

12-Jul-07 2:46

i would try www.connectionstrings.com

Program is blocked because of a SQL-Query on a locked table

zepl12-Jul-07 2:04

zepl

12-Jul-07 2:04

Hi,

I have a problem with a query on a locked table.
The Database I use is mySQL and I want to get a exception when the program try's
to execute a query on a locked table. I tried to set the CommandTimeout in the
OdbcCommand-Object and I also tried to set the "innodb lock wait timeout"-Attribut
from MysQL but it doesn't work.

Has anybody an idea..?

Re: Program is blocked because of a SQL-Query on a locked table

Paul Conrad13-Jul-07 11:47

Paul Conrad

13-Jul-07 11:47

Have you figured out the problem?

"Any sort of work in VB6 is bound to provide several WTF moments." - Christian Graus

Re: Program is blocked because of a SQL-Query on a locked table

zepl16-Jul-07 3:36

zepl

16-Jul-07 3:36

Hi,

not realy... I've found an ugly workaround but that was not what
I'm searching for. In other Database Management Systems is something
like LOCK NOWAIT.

Do you have any idea?

Thanks

Convert array to a recordset in asp

anilsingh1976@gmail.com12-Jul-07 1:57

anilsingh1976@gmail.com

12-Jul-07 1:57

I have a difficulty in putting the array in to a recordset.
Please suggest.

Thanks in advance

Re: Convert array to a recordset in asp

Paul Conrad13-Jul-07 11:47

Paul Conrad

13-Jul-07 11:47

What difficulty are you having? Be a bit more descriptive about your problem...

"Any sort of work in VB6 is bound to provide several WTF moments." - Christian Graus

Re: Convert array to a recordset in asp

anilsingh1976@gmail.com13-Jul-07 12:16

anilsingh1976@gmail.com

13-Jul-07 12:16

I am getting the data from database as usual in to a recordset.
I am having some data in array.I want to put the data back in some form in to a recordset so that the existing functionlity does not change.

Remark: The recordset has to be disconnected and database need not be updated.
It is just the calculation that I want to do on the recordset.

Please suggest.

Thanks and regards,
Anil

Re: Convert array to a recordset in asp

Paul Conrad13-Jul-07 12:23

Paul Conrad

13-Jul-07 12:23

Just insert the individual elements of the array into the record set. The recordset class should have an Add method to allow you to add the new data into the recordset. I hope this sheds some light for you.

"Any sort of work in VB6 is bound to provide several WTF moments." - Christian Graus

Quick Question.. Affected rows

Peterixina11-Jul-07 21:51

Peterixina

11-Jul-07 21:51

In my case I want to get all rows from a table (however it could be the case I [or someone else] only want to get a specific few). How would I count how many rows have been effected by the SQL query?

Heres a bit of my code:

private const string sqlGetAll =
"SELECT ID , Name , PortalMarkupFile AS Portal " +
"FROM Swin_Devices";

command = new SqlCommand(sqlGetAll, connection);

SqlDataReader reader = command.ExecuteReader();

So I'd like something like reader.getAffectedRows or something similar?

Thanks in advance,

Pete

Re: Quick Question.. Affected rows

Giorgi Dalakishvili11-Jul-07 23:25

Giorgi Dalakishvili

11-Jul-07 23:25

When you are just selecting data none of the rows get affected. Why don't you use sql Count function?

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Re: Quick Question.. Affected rows

Peterixina12-Jul-07 0:10

Peterixina

12-Jul-07 0:10

Quick bit of research into COUNT and using SELECT COUNT(*) worked a treat.

Thank you!

Re: Quick Question.. Affected rows

Giorgi Dalakishvili12-Jul-07 0:16

Giorgi Dalakishvili

12-Jul-07 0:16

You are welcome Smile | :)

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Paging

Pdh098211-Jul-07 7:22

Pdh0982

11-Jul-07 7:22

Hi All,

I need to get rid of paging. In other words, I have a webpage in which the data is now being displayed in 3 pages but I want to bring the data alll in one page. Would really appreciate if someone could give me the idea?

Thanks in advance

Re: Paging

Pete O'Hanlon11-Jul-07 10:13

Pete O'Hanlon

11-Jul-07 10:13

How is your paging being accomplished? Is it via a datagrid/repeater or through the database select? If it's via the datagrid, you can switch paging off by setting AllowPaging = false;

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