How i can create backup script from diagram in SQL Server?
I write this query and this work.

USE DestinationDatabase

DELETE  sysDiagrams
WHERE   name IN ( SELECT    name
              FROM      SourceDatabase.dbo.sysDiagrams )

SET IDENTITY_INSERT sysDiagrams ON

INSERT  sysDiagrams
    ( name ,
      principal_id ,
      diagram_id ,
      version ,
      definition
    )
    SELECT  name ,
            principal_id ,
            diagram_id ,
            version ,
            definition
    FROM    SourceDatabase.dbo.sysDiagrams

SET IDENTITY_INSERT sysDiagrams OFF