Ensure some options before CREATE TABLE statement

To create a unique index is required that the table be created with the follow
settings:

- ANSI_NULLS ON;
- ANSI_PADDING ON;
- ANSI_WARNINGS ON;
- ARITHABORT ON ;
- QUOTED_IDENTIFIER ON;
- CONCAT_NULL_YIELDS_NULL ON;
- NUMERIC_ROUNDABORT OFF.

reference: http://technet.microsoft.com/en-us/library/ms188048.aspx

MSSQL uses the configuration of server when this configuration is ommited. Until
SQL Server 2012, the default of 'ANSI_NULLS', for example, is 'OFF'.

To avoid problems with different servers (and their configurations) is a good
pratice ensure these options before table creation.