@Clusters = qw/	Cluster_ID INT IDENTITY(1,1) PRIMARY KEY, Cluster_Name VARCHAR(50) not NULL unique, DC_ID INT not NULL CONSTRAINT Cluster_2_DC FOREIGN KEY REFERENCES dbo.Data_Centers(DC_ID)/;	


@Hosts = qw/Host_ID INT IDENTITY(1,1) PRIMARY KEY, Host_Name NVARCHAR(50) NULL, Cluster_ID int CONSTRAINT Host_2_Cluster FOREIGN KEY REFERENCES dbo.Clusters(Cluster_ID), DC_ID int not NULL CONSTRAINT Host_2_DC FOREIGN KEY REFERENCES dbo.Data_Centers(DC_ID)/;