Thank you very much.

It works completely.

Here are my scripts:

EXEC sp_dropextendedproperty

@name = 'MS_Description'

,@level0type = 'schema'

,@level0name = dbo

,@level1type = 'table'

,@level1name = 'DataDelphier'

,@level2type = 'column'

,@level2name = Email;

GO

EXEC sp_addextendedproperty

@name = N'MS_Description',

@value = 'Eko Indriyawan Cakep Sekali',

@level0type = N'Schema',

@level0name = dbo,

@level1type = N'Table',

@level1name = DataDelphier,

@level2type = N'Column',

@level2name = Email;

GO

select * from sys.extended_properties

GO