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Hello,
I have the following query where I want to append to the existing table SalePrice and the the third coilumn SalePrice = 199 which is wrong .
Can you correct it ?
Can you sugest me sites to improve my query writing.
SELECT timeperiod.timeperiod,product.product,
convert(int,199) as SalePrice
INTO SalePrice FROM timeperiod,product where Product='Shirt199Light'
Can you
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Ok, so you didn't really like my answer last time. What you want then is a variation on it.
SELECT timeperiod.timeperiod,product.product,
cast(null as int) as SalePrice
INTO SalePrice FROM timeperiod,product where Product='Shirt199Light'
Bob
Ashfield Consultants Ltd
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Hello,
Your last answer was very helpful and I think asking the variation was really silly on my part but from where did you get these 'cast' and 'convert' 'as' keywords.
I have visited SQL sites but they don't offer anyting more than the basic SELEC,INSERT,WHERE keywords.
I will search for more sites and hope not to bother you much.
Thanks for your answer.
Pritha
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Hello,
The above query does not add record to the existing table.It says
'There is already an object named 'SalePrice' in the database.'
I want to add records to an existing table where all the 3 columns exist.
Thanks.
Pritha
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Hello,
I have got how to insert record
But are there any sites that offer help with such mix and match in SQL.
Prithaa
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Hi all,
I want to connect to DB2 database in my application. IS there any command line utility for the same or is there any way I may program it. My application is based on C#.net.
Thanks,
Sankalp
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hello friends
I want to convert crystal report to txt format * not rtf
Inner properties do support rtf,pdf and other formats but not txt
Thanks
Krazy Programmer
If You win You need not Explain............
But If You Loose You Should not be there to Explain......
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I need to update same table in 3 different databases. All database Name contains word user. I want to write sql query update those tables. I am using sql server 2000. please help me this is very agent
ssss
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If its a one off:
begin tran
update database1.dbo.table set .....
update database2.dbo.table set .....
update database3.dbo.table set .....
commit tran
You need to put some error checks and rollback, but you get the idea. If its an ongoing requirement you ought to consider replication
Hope this helps
Bob
Ashfield Consultants Ltd
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Actually I don't no the exactly name of the database. I only know the database name contains the word "User". Plese can u help me
ssss
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You need to generate some dynamic sql then. You can the update statements from master..sysdatabases
select 'update ' + name + '.dbo.table set ...' from master..sysdatabases
where name like '%user'
All you need to do then is put it in loop and execute it, or something similar - there are loads of ways from this point.
Bob
Ashfield Consultants Ltd
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Hello,
I have this following query
SELECT timeperiod.timeperiod,product.product,JobWork.JobWork
INTO DD FROM timeperiod,product,JobWork where Product='Shirt199Light'
But now I want to add one more column to table DD .
Is this possible in one query? Or Will I have to write one more statement after SELECT.
Thanks
Pritha
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Yes.
SELECT timeperiod.timeperiod,product.product,JobWork.JobWork, convert(int,0) as NewCol <br />
INTO DD FROM timeperiod,product,JobWork where Product='Shirt199Light'
I have used int as an example, you can use anything - I often use a real column from the select taht is of the right data type, for example:
SELECT timeperiod.timeperiod,product.product,JobWork.JobWork, product.product as OtherColumn INTO DD FROM timeperiod,product,JobWork where Product='Shirt199Light'
Bob
Ashfield Consultants Ltd
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I'm having difficulty identifying the best way to process a dataset I've been provided. It's a fairly large dataset (1.76m records) with two columns (pk1,pk2) in the primary key. e.g., {{1,a},{1,b},{1,c},{1,d},{2,a},{2,b},{3,a},{4,a},{4,b}}
What I need to do is read all the records for pk1 in the dataset {{1,1},{1,2},{1,3},{1,4}}, run some calculations on these, write the results to a different table, then move on to the next pk1. I've tried a couple methods, and run into problems in each. I'm wondering if anyone has any ideas for this.
I'm restricted using the local file system, and cannot install anything new locally: e.g., MS Access, text files (connecting through system.data.oledb), cannot install MySQL or SQLServer.
What I've done thus far, is:
- create a DataTable containing a list of distinct pk1 values [MainList]. {1,2,3,4}
- For each unique value in [MainList],
- Execute a sproc via OleDbDataAdapter.Fill method to populate a DataTable containing all records in the original dataset associated with the current pk1 {{1,a},{1,b},{1,c},{1,d}}
- Process this datatable to create the user's output
- Write the results to a separate set of tables in the same database.
This method takes an unacceptable amount of time, with 98% taken up by the .Fill method.
Next, I tried the same process, but using the OleDbDataReader in lieu of the .Fill(DataTable) process. This improves the speed slightly, but still not where we need it.
Running this file through sequentially, using a text file, and checking the current records key against the prior records key, we processed the entire file in about an hour.
We are currently running VB.NET 2005 with ADO.NET 2.0.
Also, are there any other options on databases available, provided we're not allowed to install something locally, and can only use the local system?
Any input would be appreciated.
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Seems to me that it is a simple set of select statements, unless I am missing something.
A few questions come to mind.
Do you want to do this in the database or the client (VB)?
Do you need to store the results or just output them to the client?
Personally I would use a stored proc, this gives you many tools such as table vars, cursors etc.
1.76m records is not that large.
Never underestimate the power of human stupidity
RAH
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Thank you, Mycroft,
We would prefer to have all the processing performed in the client, although creating temporary stored procs and deleting them when completed is well within reason, the calculation itself needs to be housed in the client so we want to pass the subsets of data back to the client. The problem (at least as far as I can tell) is getting the data transferred to the client for the calculation.
And yes, the results need to be stored, as the user has a number of options on how s/he can manipulate the results. Although, using an interim step to write it to a different file, then importing it to the database is feasible (since I cannot have an open datareader if I want to write something to the same database).
I hadn't thought about using a cursor for this. Are cursors available using ADO.NET?
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I don't want a display name wrote: although creating temporary stored procs and deleting them when completed is well within reason
Oh no its not reasonable - this implies you do not "own" the database otherwise why delete the proc?
I don't want a display name wrote: We would prefer to have all the processing performed in the client
"prefer" is not a strong enough reason to screw up your application design, there needs to be a good reason to inflict this design on yourself. You need to make a decision, where you want the work to be done. I always prefer the server but that does not preclude using the client. What you should not be doing is using both!
Unless there is a calculation method/function you cannot use in the server then I would pass the parameters to get the resultset to the server proc, process the calculation as close to the datastore as possible (SQL) and return the resultset.
If you must use the client I think you should look into linq. I could do this with datatables and views by iterating through the records but linq sounds like it could do the job with sql like statements.
Never underestimate the power of human stupidity
RAH
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Hello.
I have some problems with an application developed in C# and Oracle connection, The Application is a Windows Services that process some actions in an Oracle database in real time.
The problem is that I'm using C# 2003 and Framework 1.1 SP1, and I don´t know why the service lost the connection with the database and the object Oracleconnection.State is "Open".
I think that this is my problem:
http://support.microsoft.com/default.aspx?scid=kb;en-us;830173[^]
But I can´t close and open the connection all the time, I´m only need to reopen the connection when and Exception Happended (But my connection class it´s in other .net solution).
I thought that if I put a thread listening a variable that is changed any time I do an action, if this variable doesn´t change I reopend the connection, but my client doesn´t like this solution.
Anyone can help me ?, if you think on any solution please let me know.
Thank's a lot.
Regards, Jose A. Morey.
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Retain the connection credentials in the web service
retain the sql command object for resubmission
submit command
trap the error when the SQL connection fails
interrogate the error to make sure it is the connection fail error
reestablish the connection
resubmit the SQL action (this being the nasty bit)
Just some ideas!
Never underestimate the power of human stupidity
RAH
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Hi,
I have a typical scenario. I want to get
My query is
SELECT StarRate, date FROM BasicSearch WHERE date BETWEEN '2008-06-03' AND '2008-06-05';
My Result is as follows
StarRate date
-------- -----
1 2008-06-03 00:00:00.000
1 2008-06-04 00:00:00.000
1 2008-06-05 00:00:00.000
5 2008-06-04 00:00:00.000
5 2008-06-05 00:00:00.000
But I require the result as below
StarRate date
-------- -----
1 2008-06-03 00:00:00.000
1 2008-06-04 00:00:00.000
1 2008-06-05 00:00:00.000
Because StarRate 1 has all 3 dates
Thanks in advance
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SELECT DISTINCT StarRate, date FROM BasicSearch WHERE date BETWEEN '2008-06-03' AND '2008-06-05';
Bob
Ashfield Consultants Ltd
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