CREATE TABLE dbo sysdiagrams name sysname NOT NULL principal_id int NO

CREATE TABLE dbo.sysdiagrams
          (
               name sysname NOT NULL,
               principal_id int NOT NULL,     -- we may change it to varbinary(85)
               diagram_id int PRIMARY KEY IDENTITY,
               version int,
     
               definition varbinary(max)
               CONSTRAINT UK_principal_name UNIQUE
               (
                    principal_id,
                    name
               )
          );