IF OBJECT_ID('dbo.ordenes') IS NOT NULL AND COL_LENGTH('dbo.ordenes', 'customer_email') IS NULL
BEGIN
	ALTER TABLE dbo.ordenes ADD customer_email varchar(50) NULL;
	
	ALTER TABLE dbo.ordenes ADD customer_phone varchar(50) NULL;
	
	ALTER TABLE dbo.ordenes ADD customer_identification varchar(50) NULL;
END