I am trying to create an Entity that has a byte[12] id in hibernate.It seems like it does not like to开发者_运维技巧 have a byte[] as a primary key and as another column it sets it up as a tinyblob in
I follow by entity framework example : http://msdn.microsoft.com/en-us/library/bb399182.aspx and I have problem with Identity Columns.
I am using the Key value of entities in my datastore as the unique identifier in the URL for pulling up a record:
In my database application, when I try t开发者_如何学Co attach a page to a site, I get the following error:
Choosing good primary keys, candidate keys and the foreign keys that use them is a vitally important database design task -- as much art as science. The design task has very specific design criteria.
Is there a way in SQL Server to create a table with a primary key that auto-increments itself?I\'ve been looking at the \"UniqueIdentifier\" type, but this doesn\'t seem to do what I expect.
When building an application and you are using a table that has a primary key, should you check to see if the table has a primary key or does not have duplicate IDs?
I am using SSMS 2008 and trying to insert with this query but am getting the following error: Msg 2627, Level 14, State 1, Line 1
I am starting out with PRADO php framework and i have a quick question: How to get the Primary Key of the last inserted record? My codes are as follow:
I need to programatically determine what the primary key field(s) are for a given sqlite table (using sqlite api, not command line).
加载中,请稍侯......