T - SQL 의 전역 변수

전역 변수
 select APP_NAME ( ) as w --         
 select @@ERROR    --        Transact-SQL        (integer)(           ,    0)
 select @@IDENTITY   --          
 select USER_NAME()    --          
 select @@CONNECTIONS  --     SQL              。
 select GETDATE() --    
 select @@CPU_BUSY/100  --       SQL    CPU      ,     
 USE tempdb select @@DBTS  as w  --           timestamp       。   timestamp             。
 select @@IDLE  as w  --  SQL           ,     
 select @@IO_BUSY AS w   --  SQL                    ,     
 select @@LANGID AS w   --                 (ID)
 select @@LANGUAGE AS w   --          
 select @@LOCK_TIMEOUT as w  --            ,     。
 select @@MAX_CONNECTIONS  as w  --  SQL              。              
 EXEC sp_configure  --              
 select @@MAX_PRECISION as w --   decimal   numeric            ,             。      38。
 select @@OPTIONS  as w  --     SET      。
 select @@PACK_RECEIVED as w  --  SQL                  。
 select @@PACK_SENT as w  --  SQ                   。
 select @@PACKET_ERRORS as w  --   SQL   , SQL              。
 select @@SERVERNAME as w --    SQL     。
 select @@SERVICENAME  as w --  SQL            
 select @@TIMETICKS  as w --  SQL          
 select @@TOTAL_ERRORS AS w  --   SQL       ,       /    。
 select @@TOTAL_READ  as w  --   SQL              。
 select @@TOTAL_WRITE as w  --  SQL              。
 select @@TRANCOUNT  as w  --
 select @@VERSION as w  --  SQL        、        。

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