/// Количество дней 
Property BerthDayCnt As %Integer [ Calculated, SqlComputeCode = {Set {BerthDayCnt}=##class(data.alloc.Berthing).GetBerthDayCnt({ID})}, SqlComputed ];

/// Метод для подсчета количества дней 
ClassMethod GetBerthDayCnt(SC As %Integer) As %Integer [ SqlProc ]
{
	SET res =  0 
	&sql(
		SELECT
			DATEDIFF(dd,BerthDate,SailingDate)  INTO :res
		FROM
			data_alloc.Berthing
		WHERE
			ID=:SC)
	QUIT res
}