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.
Mood disorders include major depressive disorder, dysthymic disorder, and bipolar disorder. 1  Approximately 20.9 million American adults, or about 9.5 percent of the U.S. population age 18 and older in a given year, have a mood disorder.2  The median age of onset for mood disorders is 30 years. Approximately 2.4 million American adults, or about 1.1 percent of the population age 18 and older in a given year, have schizophrenia. 2  Schizophrenia affects men and women with equal frequency. 3  Schizophrenia often first appears in men in their late teens or early twenties.