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See here[^] for some useful sources.
Binding 100,000 items to a list box can be just silly regardless of what pattern you are following. Jeremy Likness
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Get the AdventureWorks database if you are using SQL Server. Then get any book on T-SQL or Stored Procedures and start to work.
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Assume @Code is a three character prefix, ie: AUS
Why does this break:
DECLARE @TEMP VARCHAR(7) =
(SELECT TOP 1 CustCode
FROM Customer
WHERE LEFT(CustCode, 3) = @Code)
with the following error?
Maximum stored procedure, function, trigger, or view nesting level exceeded (limit 32).
I don't speak Idiot - please talk slowly and clearly
'This space for rent'
Driven to the arms of Heineken by the wife
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I suspect there are more than 1 record matching your @code filter and you are trying to stuff more than 1 record into @Temp.
Nope - thats not it, you have top 1. It works for me on sql server 2008 R2. I used this
DECLARE
@Code VARCHAR(3)
SET @Code = '103'
DECLARE @TEMP VARCHAR(7) =
(SELECT TOP 1 filename
FROM dbo.ImportFiles
WHERE LEFT(filename, 3) = @Code)
SELECT @Temp
Which gives me the first 7 characters of the filename (all the file names start with 103). Changing @Code returns null
Never underestimate the power of human stupidity
RAH
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Thanks for looking Mycroft - seems the issue is a calculated field (CustCode) that is part of the table definition.
CREATE TABLE Customer(
...
CustCode AS udf_GetCustCode(@Name),
...
I think this needs to be calculated as a udf during the INSERT.
I don't speak Idiot - please talk slowly and clearly
'This space for rent'
Driven to the arms of Heineken by the wife
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Andy_L_J wrote: seems the issue is a calculated field (CustCode) that is part of the table definition.
Probably fired off by a trigger - triggers how to completely f*** your database.
Never underestimate the power of human stupidity
RAH
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I have a table that stores transactions for income and expenditure. the fields of the table is shown below
transid, accountcredited, accountdebited, date, amount. Every transaction has double entry; it debits one account and credit another.
The accountcredited and accountdebited are linked to accounts table(the fields for accounts table are accid, accountno, balance)
The problem is I cannot figure out sql statement generate running balance
Thanks in advance
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Try a search [^] this question has been answered so many times before.
Never underestimate the power of human stupidity
RAH
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I guess you have to use SUM and GROUP BY, by the way your question is not enough clear.
I Love T-SQL
"VB.NET is developed with C#.NET"
If my post helps you kindly save my time by voting my post.
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Hi
Need to know how to connect to Oracle (11g) database from Log4net.config (using appenders) file. As I need to wright the logs to the Oracle (11g) database when any user logon to the web application.
Note: I am succesfully able to wright the logs to the text files but not able to wright the logs to the Oracle (11g) database.
Any help is greatly appreciated.
Regards
Bala
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Try this[^].
Bastard Programmer from Hell 
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As part of my degree I recently submitted an interim paper and one of the feedback comments from the tutor was along the lines of "consider asking the opinions of others on the database, it is not cheating as long as you properly reference your source". Fair point I thought so here I am.
In my submission I had written about the two options I had considered for the database model and why I had elected to choose the one I did. So the question arises from this, what other options are there or what would your preferred approach be?
Basically, the project is looking at migrating an existing file based process across to a web solution, and part of the system relates to the daily reporting of end of period figures and status.
At the end of each daily reporting 24 hour period, a whole bunch of items are recorded, and these are recorded for more that one site, and not every site records the same metrics, but the majority of them are all the same.
As it stands at present there are approximately 30 parameters recorded, some numerical, some textual.
The first option I considered was row per site per period, with each column representing a metric (I will just call them param, but in reality they have meaningful names).
<id><site><period-end-date><param-n><param-n+1><param-n+2>............etc.
The second option was splitting the KPIs into groups, and have table per group with one master record identifying the site and period in another table.
Master Table
<id><site><period-end-date><KPI-group-A-ID><KPI-Group-B-ID><KPI-Group-C-ID>
KPI Group A Table
<id><param-n><param-n+1><param-n+2>............etc.
KPI Group B Table
<id><param-n><param-n+1><param-n+2>............etc.
KPI Group C Table
<id><param-n><param-n+1><param-n+2>............etc.
I originally have coded the models using code first approach (I'm using EF and MVC3) using option 2, as thought it would be easier to manage and allow for easier scaling, and appears to work well.
The part I am adding in at the moment is a losses breakdown for period, so each site might have multiple entries in a loss table linked to the Master Record in a one-to-many.
So the question is, particularly to any DBA's or architects, how would you or what suggestions would you have on how best to build the database to meet the needs, allowing for potentially more kpi parameters or groups to be added in the future.
Any thoughts greatly appreciated.
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I'd vary on option two; have a master-record with period and all columns that the sites have in common (since they're dependent on the key) and keep the optional columns in a separate table, with a 1-1 relation.
It'd mean having to create a new table when a new column-definition arises, which may or may not be a problem. It also sucks when creating reports if you have to take tables in account that "might" exist.
Bastard Programmer from Hell
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Thanks for your input Eddy.
The only issue I have is with seperating out the common columns, this would result in the grouping of columns being broken, and fragmenting a cluster of points across different tables.
Then there is the issue if you have 1 point that started as non-common point, becoming a common point due to modifications on the plant. You have then broken the rule of keeping common points together, moving the column and data across to the common table could break all the underlying code.
Likewise, going the other way, you may have a point that starts common, but due to modifications on the plant no longer becomes common.
I have been working on this on and off over the last week, and so far, it still feels more logical to group categories of points together in one table and keep the master site record entry seperate.
I have since also added in another table which records a breakdown of each individual sites losses (an entry for each root cause event) for each reporting period (one to many), and by introducing this additional table and relationship, it makes even more sense to keep any KPI metrics out of the master table.
Cheers,
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DaveAuld wrote: So the question is, particularly to any DBA's or architects, how would you or
what suggestions would you have on how best to build the database to meet the
needs, allowing for potentially more kpi parameters or groups to be added in the
future.
Your notation is not familar to me however it doesn't seem to encapsulate what I would do.
The problem of your description seems to be the following.
1. You have a number of sites
2. You collect named 'metrics' from each site
3. The collection of metrics for a specific site do not match other sites.
4. And as a guess you have not considered that over time the metrics from one site might not be the same set either.
Given that I would have probably have the following table structure
1. "Site" with "Site Id" and other information specific only to the site.
2. "Metric Description" with "Metric Desc Id" and perhaps "Value Type"
3. "Metric" which has "Site Id", "Collected Timestamp", "Metric Desc Id" and "Metric Value"
Each site results in an entry in 1.
Each metric results in an entry in 3.
Table 2 is probably managed manually.
The "Value Type" allows one to identify what the "Metric Value" represents. For example it could be a timestamp, count, time span, float, integer, etc.
The above is a bit vague because the specifics of the actual system are needed to refine it further.
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Thanks for your valued input. Further to the comments made to Eddy above;
What you have shared is probably what approach I would use for data collection repository, when any given point could be recorded at any given time.
All points I am recording will be manually entered at the same time, all with the same 'end of period' timestamp.
I am using some validation logic on the post back to check which site the data is being recorded for and set any 'unused' point to zero or empty string (depending on the datatype)
Also, the views are tailored to only display the relevant collection points to the user based on site.
You have given me some more food for thought.........thanks.
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I want it in runtime using C#.
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carm_ella wrote:
I want it in runtime using C#.
You want mayo with that, hon? Should I wrap it, or are you gonna eat the code right away? 
Bastard Programmer from Hell
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Thank you! I want the code sir.
However, can you give me some tutorials on how to create SQL database in visual studio 2010 using c# with backup and restore? I knew a lot in MySQL using a server package of it and currently studying SQL built-in in VS2010. 
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First, the answer to your question; BACKUP[^] and RESTORE[^].
carm_ella wrote: I want the code sir.
You have been given links to the manual. I suggest you read it and write the code.
Bastard Programmer from Hell
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Hi.
I had a database that was working very well in sql server 2005. I upgraded my SQL to SQL 2008 R2 . After upgrading , I wanted to drop one of my tables.
But i could not. It gives this error
No catalog entry found for partition ID 281474980577280 in database 5. The metadata is inconsistent. Run DBCC CHECKDB to check for a metadata corruption
I don't know what to do
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Just as a wild guess, but why not run DBCC CHECKDB?
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