Is it possible to constrain the 开发者_如何学Ctype of generic to, say, two different classes? Like so:
Currently we are using check constraints for business rules implementation, but I want to know if we should implement business rules in SQL or in the business logic layer (C#). I have searched on the
I need to update an existing constraint in Oracle database to add a new column there. ALTER TABLE MY_PARTNER_DETAILS
I just came across NULL values in NOT-NULL fields in our test database. How could they get there? I know that NOT-NULL constraints can be altered with NOVALIDATE clause, but that would change table\'s
Is 开发者_如何学Gothere a way to set a SQL constraint for a numeric field that min value should be 1234 and max value should be 4523?SQL Server syntax for the check constraint:
When enforcing a Generic constraint class GenericTest { public void Sample<T>(T someValue) where T:Racer,new()
Let\'s say we are having a table with this definition: range ( id bigint primary key, colourId int references colour(id),
I\'m studying databases and am currently working on a object-relational DB project and I\'ve encountered a small problem with the number of possible constraints in an object table. I\'m using \"Databa
I want to constrain a SQL Server decimal column to only allow -1,0,1 as valid values. Can you show me the SQL syntax for adding such a constraint. (I would like to know how to do it in both the CREA
How can I drop all user tables in oracle? I have problem with constraints. When I disable all it i开发者_开发百科s still no possible.BEGIN
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