Database schema: create table Items ( CollapsedHeight integer, Collapsible integer, CustomerItemNumber varchar(20), Height integer, Id integer primary key, FloorLocation varchar(20), FullTrailerLoad varchar(20), ImageFileName varchar(20), IsUnitLoad integer, Length integer, Name varchar(20), PalletQty integer, ShortName varchar(20), StackHeight integer,  TypeId integer FK->ItemTypes.Id, UnitCost Decimal(18,2),Weight float, Width integer );create table ItemTypes (Id integer Primary Key, Description varchar(50), Deleted INTEGER, Repairable Integer, OverridePutAwayLocationid integer FK->Locations.id);
Question: how many Unit Load items are in the system 
SQL: select count(*) from items where isUnitLoad = 1