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SQL (What does type = 'U') mean?

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Last Modified: 2012-05-05
What does the U in "type = 'U'" mean? What are the other values other than U that might be used?

Thanks


IF NOT EXISTS (select * from dbo.sysobjects where id = object_id(N'COMPONENT_EVENT') and type = 'U')
BEGIN
      CREATE TABLE COMPONENT_EVENT (
             COMPONENT_EVENT_ID   integer IDENTITY,
             COMPONENT_CD         nvarchar(50) NOT NULL,
             COMPONENT_DESC       nvarchar(50) NULL,
             COMPONENT_EVENT      nvarchar(30) NULL,
             COMPONENT_LEVEL      nvarchar(30) NULL,
             EVENT_DT             datetime DEFAULT getdate() NOT NULL,
             CTRL_INSERT_DT       datetime DEFAULT getdate() NOT NULL,  
             CTRL_UPDATE_DT       datetime DEFAULT getdate() NOT NULL
      )
      
      ALTER TABLE COMPONENT_EVENT
             ADD CONSTRAINT CMPNNTVNT_PK PRIMARY KEY (COMPONENT_EVENT_ID ASC)
END
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