Custom Primary Key
Apr 4, 2006
Not sure where to post this as it may be a form operation but here goes...
I want to generate a custom unique identifier for a table similar to the Northwind Customers database (ie ALFKI, ANTON, etc...) which can be used as a descriptive identifier as well.
For example, I have a Products table and I want to have my keys look like: CHR-0001-05.
"CHR" is my abbreviation for Chairs
"0001" is the auto-incrementing number (in this case the first record of the table)
"05" is the last 2 digits of the year recieved (2005)
Can somebody please point me in the right direction? I'm having problems finding resources on the web relating to this topic (prolly not using the correct keywords for my searches)
Cheers =)
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Mar 27, 2008
Hello everyone!
Even though I am not "new to SQL Server", my experience in working with it has ebbed and flowed, and working with SQL Server is not something that happens for me even on a monthly basis.
I work as an in-house programmer for a financial investment company and I have been asked to work on a database that is to hold financial data.
One of the requirements for the tables has been that the Primary Key should be [name_of_the_table] + [Identity].
So, for example, for table "tblEquities", the values of the Primary Key would be:
PK
-------
tblEquities1
tblEquities2
tblEquities3
tblEquities4
tblEquities5
My questions are:
1) Is it possible to achieve this by using just one column, as in defining a formula for the "Computed Column Specification" , something that would look like "'tblEquities' + Identity()"?
2) If the above is not possible, I assume it's much easier to just define a column as being Identity column and then create a 2nd computed column that would aggregate the name of the table with the value in the Identity column, so that I end up with a column holding the desired values? (I guess it would look something like
"'tblEquities' + [Identity]")
Also, I have been asked to find out what SQL 2005 have/offers, in term of guaranteeing referential integrity. Are the "Database Diagram", as well as the "Relationships" dialog box, the tools that would meet that criteria or does SQL 2005 contain other tools that would help in this regard?
Thank you!
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May 22, 2008
We are developing a batabase which is meant for financial domain,so it will import data from different source system..
and data from our data base will be further passed to other applications.
In contex of our system integration with other data sources ,whether is it a good idea to have a auto integer primary key a or to implement some logic to generate primary key?
Can some one guide us to some pratical data base design case studies?or some best practices.?
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Mar 11, 2008
I currently have a website which is using ASP.NET 2.0, C#, and SQLServer 2005. The website will be used to enter grants for auniversity. When a new grant is entered, I need to generate a primarykey. The primary key will need to follow the format: Two digit forfiscal year, then number of the grant for that year. Example:Year 08 and 14th grant of the year would be: 0814How can I implement this. Right now, I have a "New Grant.aspx" pagewith a Submit button. I am guessing the date is going to be formattedin C#. How can I check what the last primary key in the database is?Also, it seems to me that SQL Server insists that the primary key be32 bits long, however my primary key will only be 4. How can Ioverride this? Thanks.
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Mar 8, 2007
Hi,
I am creating a custom transformation component, and a custom user interface for that component.
In
my custom UI, I want to show the custom properties, and allow users to
edit these properties similar to how the advanced editor shows the
properties.
I know in my UI I need to create a "Property Grid".
In
the properties of this grid, I can select the object I want to display
data for, however, the only objects that appear are the objects that I
have already created within this UI, and not the actual component
object with the custom properties.
How do I go about getting the properties for my transformation component listed in this property grid?
I am writing in C#.
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Aug 14, 2007
Hi,
I've created a Custom Data Flow Component and added some Custom Properties.
I want the user to set the contents using an expression. I did some research and come up with the folowing:
Code Snippet
IDTSCustomProperty90 SourceTableProperty = ComponentMetaData.CustomPropertyCollection.New();
SourceTableProperty.ExpressionType = DTSCustomPropertyExpressionType.CPET_NOTIFY;
SourceTableProperty.Name = "SourceTable";
But it doesn't work, if I enter @[System:ackageName] in the field. It comes out "@[System:ackageName]" instead of the actual package name.
I'm also unable to find how I can tell the designer to show the Expression editor. I would like to see the elipses (...) next to my field.
Any help would be greatly appreciated!
Thank you
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Apr 2, 2007
Hi,
I'm trying to enable Expression for a custom property in my custom data flow component.
Here is the code I wrote to declare the custom property:
public override void ProvideComponentProperties()
{
ComponentMetaData.RuntimeConnectionCollection.RemoveAll();
RemoveAllInputsOutputsAndCustomProperties();
IDTSCustomProperty90 prop = ComponentMetaData.CustomPropertyCollection.New();
prop.Name = "MyProperty";
prop.Description = "My property description";
prop.Value = string.Empty;
prop.ExpressionType = DTSCustomPropertyExpressionType.CPET_NOTIFY;
...
}
In design mode, I can assign an expression to my custom property, but it get evaluated in design mode and not in runtime
Here is my expression (a file name based on a date contained in a user variable):
"DB" + (DT_WSTR, 4)YEAR( @[User::varCurrentDate] ) + RIGHT( "0" + (DT_WSTR, 2)MONTH( @[User::varCurrentDate] ), 2 ) + "\" + (DT_WSTR, 4)YEAR( @[User::varCurrentDate] ) + RIGHT( "0" + (DT_WSTR, 2)MONTH( @[User::varCurrentDate] ), 2 ) + ".VER"
@[User::varCurrentDate] is a DateTime variable and is assign to 0 at design time
So the expression is evaluated as: "DB189912189912.VER".
My package contains 2 data flow.
At runtime,
The first one is responsible to set a valid date in @[User::varCurrentDate] variable. (the date is 2007-01-15)
The second one contains my custom data flow component with my custom property that was set to an expression at design time
When my component get executed, my custom property value is still "DB189912189912.VER" and I expected "DB200701200701.VER"
Any idea ?
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Aug 17, 2005
What I want to accomplish is that at design time the designer can enter a value for some custom property on my custom task and that this value is accessed at executing time.
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Aug 16, 2006
I am writing a custom task that has some custom properties. I would like to parameterize these properties i.e. read from a varaible, so I can change these variables from a config file during runtime.
I read the documentation and it says if we set the ExpressionType to CPET_NOTIFY, it should work, but it does not seem to work. Not sure if I am missing anything. Can someone please help me?
This is what I did in the custom task
customProperty.ExpressionType = DTSCustomPropertyExpressionType.CPET_NOTIFY;
In the Editor of my custom task, under custom properties section, I expected a button with 3 dots, to click & pop-up so we can specify the expression or at least so it evaluates the variables if we give @[User::VaraibleName]
Any help on this will be very much appreciated.
Thanks
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Jan 11, 2007
Uma writes "Hi Dear,
I have A Table , Which Primary key consists of 6 columns.
total Number of Columns in the table are 16. Now i Want to Convert my Composite Primary key into simple primary key.there are already 2200 records in the table and no referential integrity (foriegn key ) exist.
may i convert Composite Primary key into simple primary key in thr table like this.
Thanks,
Uma"
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Aug 28, 2002
Hi all,
Can anyone suggest me on Adding primary key to a table which has already a primary key.
Thanks,
Jeyam
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Aug 13, 2007
Hi,
I have recently been looking at a database and wondered if anyone can tell me what the advantages are supporting a unique collumn, which can essentially be seen as the primary key, with an identity seed integer primary key.
For example:
id [unique integer auto incremented primary key - not null],
ClientCode [unique index varchar - not null],
name [varchar null],
surname [varchar null]
isn't it just better to use ClientCode as the primary key straight of because when one references the above table, it can be done easier with the ClientCode since you dont have to do a lookup on the ClientCode everytime.
Regards
Mike
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Feb 4, 2015
We have a table, which has one clustered index and one non clustered index(primary key). I want to drop the existing clustered index and make the primary key as clustered. Is there any easy way to do that. Will Drop_Existing support on this matter?
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Jan 28, 2004
Hi all
I have the following table
CREATE TABLE [dbo].[property_instance] (
[property_instance_id] [int] IDENTITY (1, 1) NOT NULL ,
[application_id] [int] NOT NULL ,
[owner_id] [nvarchar] (100) NOT NULL ,
[property_id] [int] NOT NULL ,
[owner_type_id] [int] NOT NULL ,
[property_value] [ntext] NOT NULL ,
[date_created] [datetime] NOT NULL ,
[date_modified] [datetime] NULL
)
I have created an 'artificial' primary key, property_instance_id. The 'true' primary key is application_id, owner_id, property_id and owner_type_id
In this specific instance
- property_instance_id will never be a foreign key into another table
- queries will generally use application_id, owner_id, property_id and owner_type_id in the WHERE clause when searching for a particular row
- Once inserted, none of the application_id, owner_id, property_id or owner_type_id columns will ever be modified
I generally like to create artificial primary keys whenever the primary key would otherwise consist of more than 2 columns.
What do people think the advantages and disadvantages of each technique are? Do you recommend I go with the existing model, or should I remove the artificial primary key column and just go with a 4 column primary key for this table?
Thanks Matt
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Apr 21, 2006
1) We are writing a custome Source component for Oracle with OCI calls, Could some one please let me know how to Enable Error Handling for the Same,
2) Is it possible to write Custome Error Handeling Component for SSIS? if yes could you please help me on how to write it.
Thanks in advance.
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Oct 23, 2007
Hi,I have a sql statement: SELECT [ItemName], [Startprice], [Percentreduction], [Quantityavailable], [PhotoURL], [proID] FROM [items] WHERE ([featured] = @featured) but I would like to add in 2 more where clauses. One is AND (aswell as) the current one, soWHERE ([featured] = @featured) AND ([Quantityavailable > @Quantityavailable) ?(@Quantity available value set to 0)(is that right?)and also I want another AND which is taken from another column. i.e:WHERE ([featured] = @featured) AND ([Quantityavailable > @Quantityavailable) AND ([numberclickedin< *the number from the numtaken column*]) So I guess my 2 questions are:1. is the format right for my custom sql statements.2. how do I get the number from the numtaken column to dynamically enter into the third statement? Thanks,Jon
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Jun 14, 2007
I have a custom DLL in C# which does a lot of calculations.
I need to use it in my DataFlowTask. I wanted to add it as a reference in ScriptComponent and use it from there, but I do not see my dll there.
The dll is sign but does not have Post-build event command filled in the properties of the project and my dll is deployed and installed to assembly.
What do I do wrong?
How can I use my dll in ScripComponent? Any other options? What am I missing?
Thanks.
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Jun 9, 2007
Hi,
i used the custom sqlsitemapprovider which is in this web : http://msdn.microsoft.com/msdnmag/issues/06/02/wickedcode/default.aspx?loc=&fig=true#fig5 but in this sample they used sqlsitemapprovider as a default sitemapprovider i dont wanna use it as a default and i wanna send a paramater which is used to filter datas to that class. I modified that class and i can take a sitemapprovider back and i wanna show it a sitemappath data source programmaticaly. i wanna create an instance object of sitemappath datasource and i wanna bind it to that class and then i wanna add a treeview control to the page then i wanna bind it to the sitemapdatasource programmaticaly too..
Thanks for your attetion.
Regards...
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Jun 19, 2007
If I hard code the select statement everything works fine.
<asp:SqlDataSource ID="SqlDataSourceZip" runat="server" ConnectionString="<%$ ConnectionStrings:MyConnectionString %>"
SelectCommand="SELECT * FROM [Station] WHERE ([ZipCode] = '80523' OR [ZipCode] = '80521' OR [ZipCode] = '80553' OR [ZipCode] = '80522' OR [ZipCode] = '80526' OR [ZipCode] = '80527' OR [ZipCode] = '80525' OR [ZipCode] = '80524' OR [ZipCode] = '80547' OR [ZipCode] = '80535' OR [ZipCode] = '80538' OR [ZipCode] = '80551' OR [ZipCode] = '80549' OR [ZipCode] = '80550' OR [ZipCode] = '80546' OR [ZipCode] = '80539' OR [ZipCode] = '80512' OR [ZipCode] = '80537' OR [ZipCode] = '80541' OR [ZipCode] = '80650' OR [ZipCode] = '80515' OR [ZipCode] = '80513' OR [ZipCode] = '80610' OR [ZipCode] = '80534' OR [ZipCode] = '80536' OR [ZipCode] = '80634' OR [ZipCode] = '80543' OR [ZipCode] = '80532' OR [ZipCode] = '80638' OR [ZipCode] = '80615' OR [ZipCode] = '80646' OR [ZipCode] = '80648' OR [ZipCode] = '80612' OR [ZipCode] = '80631' OR [ZipCode] = '80528')"> </asp:SqlDataSource>
Want to use a label control to return data, but can't find anything that works.
<asp:Label ID="zipLabel" runat="server"></asp:Label>
[ZipCode] = '80523' OR [ZipCode] = '80521' OR [ZipCode] = '80553' OR [ZipCode] = '80522' OR [ZipCode] = '80526' OR [ZipCode] = '80527' OR [ZipCode] = '80525' OR [ZipCode] = '80524' OR [ZipCode] = '80547' OR [ZipCode] = '80535' OR [ZipCode] = '80538' OR [ZipCode] = '80551' OR [ZipCode] = '80549' OR [ZipCode] = '80550' OR [ZipCode] = '80546' OR [ZipCode] = '80539' OR [ZipCode] = '80512' OR [ZipCode] = '80537' OR [ZipCode] = '80541' OR [ZipCode] = '80650' OR [ZipCode] = '80515' OR [ZipCode] = '80513' OR [ZipCode] = '80610' OR [ZipCode] = '80534' OR [ZipCode] = '80536' OR [ZipCode] = '80634' OR [ZipCode] = '80543' OR [ZipCode] = '80532' OR [ZipCode] = '80638' OR [ZipCode] = '80615' OR [ZipCode] = '80646' OR [ZipCode] = '80648' OR [ZipCode] = '80612' OR [ZipCode] = '80631' OR [ZipCode] = '80528'
something like this, but it don't work.
SelectCommand="SELECT * FROM [Station] WHERE (<%=zipLabel.Text%>)"> </asp:SqlDataSource>
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May 23, 2005
Im in the process of trying to teach myself SqlServer, comming from Oracle. How the heck do I get the equivlent of %ROWNUM pseudo-column in SqlServer? Top just isn't doing it for me.
Oracle Example wrote:
Select * from foo where foo%ROWNUM > 10 and foo%ROWNUM <20;
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Oct 5, 2000
Would anyone be aware of anyplace I could find some good information on creating DTS custom tasks? I've come across a couple of articles from SQL Server Magazine, but nothing too substantive...
Better yet, if anyone has any success (great or small), I'd like to hear from you and hear some of the things you did, what your custom task does, difficulty.
I'm just trying to get an idea of how much work I have ahead of me....
Thank You...
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Jul 11, 2005
Hi guys.
I want to create a top 20 product list from a few thousand products. I want the rest of the products to be grouped into 'others'...
I also want the products to be ordered by the facts in the cube. Thus the product dimension would dynamically change depending on the Time dimension thats being selected.
is this plausible ?
Thanks
Tom
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Jul 5, 2002
I've created a custom task in VB6 and compiled the DLL. wHen I run the task in DTS designer as a step it runs ok, however when I try to exectue the whole package nothing happens??
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Jun 4, 2007
Hi All!
I was thinking of creating a custom generated IDs for my table. I would like the ID to be something like "HR001" or "IT001", the two letter prefix would indicate the dept it belongs to. Initially I thought of having a table that will hold all the seed values for the IDs but I realize that this could have some concurrency problems if there will be a multiple number of users are creating a record at the same time. So now I have totally no idea on how to deal with the concurrency problem.
I will not be using this as a primary key because I already have the Identity field to be my primary key, though of course this field would definitely be unique. I will just be using this to display in the UI.
Any inputs would be greatly appreciated.
Thanks!
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Jan 18, 2007
Hi,
I am showing my report in the web application using Report Viewer control.In the report i have start date and End date parameters.While running the report if i give startdate as '45/66/20007' it is displaying a message which is not user friendly.Is there is any way we can handle this type of errors and display our own custom error messages.
Thanks in advance
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Oct 24, 2005
I am trying to design a Component which can be configured by a UI. After Configuration from the Design pane the Data should be passed to the back-end of the Component.
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May 17, 2007
I am trying to use custom code on a report which is:
Public Function Percentage(decValueOne As Double, decValueTwo As Double) As Object
If (decValueOne = 0 Or decValueTwo = 0) Then
Percentage = 0
Else
Percentage = (decValueOne - decValueTwo)
End If
End Function
In my textbox I have:
=Code.Percentage(SUM(Fields!PreviousYTDExpenseAmount.Value, "Template_OutputData_Sales"), SUM(Fields!PreviousYTDExpenseAmount.Value, "Template_OutputData_CGS"))
When I run the report in design mode, I get the "#Error" on that report field.
Any help with why this is happening would be greatly appreciated!
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Jun 22, 2007
Hi All, I have a sample Flat File, need to get a custom record layout out of it
Sample FlatFile Input:
============
RecordA.....
RecordB.....
OwnerAB.....
RecordC.....
RecordD.....
OwnerCD.....
......
Custom Output:
============
OwnerAB RecordA ............RecordB.....
OwberCD RecordC ..........RecordD..............
............
TIA
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Jul 18, 2006
I'm wondering if there is any way in RS to create what Crystal reports calls Custom or Named Groups. This functionality allows you to define groups based on the values found in one of the fields on your report. For example, if I were grouping on a person's last name and I want 3 groups based on the first letter: A-G, H-P, Q-Z. I would want to keep it contained in one table.
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Jan 9, 2006
Friends,
First off, congrats and thank you to everyone at Microsoft for all of the hard work they have put into Sql Server 2005 and .NET 2.0 - it is simply amazing technology.
On that note, I was wondering if it was possible to create my own custom exceptions that I can throw in my stored procedures and then catch in my application code?
For example, say I wanted to create a Custom Sql Exception called "DuplicateEmailInSqlDatabaseTableException" and then, within a stored procedure where data is being attempted to be inserted, I could check for a duplicate email record and then throw the exception. At that point, I would like to be able to catch that exception in my C# data layer and work from there.
Is this possible? I feel like it could be but am unsure where to start.
Shaun C McDonnell
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Aug 8, 2006
Hi All,Is it possible to create SSIS custom component with ATL COM dll with MFC support?I'm not familar with C# & VB# languages :-(Regards,Svilen Varbanov
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Sep 3, 2007
i have this action.jumpto url
="javascript:void window.open('http://bklc-crm01:5555/cs/cases/edit.aspx?id={" & cstr(Fields!incidentid.Value) & "}','_self')"
for some reason when i use this field (incidentid.value) there is no hyperlink generated, however when i change the value to another field, the hyperlink works, what shall i be looking for, incident value is a set of number with dashes!
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Jun 27, 2006
I have created custom form without borders , i have written functions to minimize, maximize, exit and even for moving the window, now i need to write function to resize the window , is there any way resize the window...
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