Legislative Bills. Legislation begins with the submission of a bill to the legislature for consideration. A bill is a draft, or tentative version, of what might become part of the written law.
SQL Server 2005: using symmetric keys to encrypt data. In SQL Server 2005, the recommended method for encrypting data is to use symmetric keys. A symmetric key can be created using the CREATE SYMMETRIC KEY statement. Information about symmetric keys is stored in the sys.symmetric_keys catalog.
Other ways that foreign keys differ from primary keys are that you can create more than one foreign key on a table and you can define foreign keys on columns that permit NULL values. In addition, SQL Server does not automatically index the foreign key columns like it does for primary keys.