how to add a unique constraint of asql table as foreig开发者_如何学运维n key referenceto an another sql table in sql server 2005 In order to add FK constraint (in child table to parent table) you have
I\'m using Entity Framework 4.0 to access data in a table with a unique column constraint.If the constraint is violated, an exception occurs when I call SaveChanges(), as expected.My que开发者_如何学运
In my entity data model I have an entity with one property as the primary key and another property that will have unique values too, so I’d like to create a unique index on that 开发者_开发技巧other
I\'d like to enforce a unique constraint on two columns with LINQ to SQL. I have got a constraint configured on a SQL table, but is there a way to use it with LINQ to SQL?
I have a table \"items\" with a column \"position\". position has a unique and not-null constraint. In order to insert a new row at position x I first try increment the positions of the subsequent ite
If you have the following tables and relations: A Product table A Price Point table (one or more prices for a product)
I have a table, something like FieldsOnForms( FieldID int (FK_Fields) FormID int (FK_Forms) isDeleted bit
The central problem: How do you merge attribute collections by a key during mass assignment from a nested form.
I use Entity Framework to access my SQL data. I have some constraints in the database schema and I wonder how to handle exceptions that are caused by these constraints.
I have 2 tables T_Foo foo_id fooHeader T_FooBodys foo_id foobody foo_id are primary key for both of their respective tables. In second table, foo_id is foreign key to first table. I generate the P
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