One basic concept to understand about SQL Server is that of catalog views, which are effectively database tables (catalogs in this case) that display system-wide information about the SQL Server Database Engine. All catalog views are accessed via a SELECT SQL statement FROM a specific catalog within the sys. namespace. For example, the following statement can be used to view information about all database tables in the system via the sys.tables catalog: SELECT * FROM sys.tables.
Mental disorders were one of the five most costly conditions in the United States in 2006, with expenditures at $57.5 billion. Over 8.9 million persons have co-occurring disorders â that is, they have both a mental and substance use disorder.
In the past year, 20.2 million adults (8.4%) had a substance use disorder. Of these, 7.9 million people had both a mental disorder and substance use disorder, also known as co-occurring mental and substance use disorders. Various mental and substance use disorders have prevalence rates that differ by gender, age, race, and ethnicity.