Иерархическая организация — структура с вертикальной  формой управления (контроля) элементами, входящими в неё. Фактически это пирамида , каждым уровнем которой управляет более высокий уровень. [ править ] Особенности иерархической организации К иерархическим организациям относятся все системы, где есть силовой контроль над более низкими уровнями. Например, это может быть сообщество животных( стая ) со своим вожаком и его «приближёнными».
I haven’t had much use for Trees in APEX in the past. However, when trying to decide on a navigational aid in our new development project I’ve turned to Trees as a possible solution. We’ve taken the decision to use one of the built in themes and customise it for our purpose. Once we had decided on the theme it was quickly decided that the breadcrumb region took up too much space and wasn’t really fit for purpose so wouldn’t be used. We needed a solution so that users could quickly navigate to different areas of the application and also see how they got to the page they’re on and where they are within the application.
Hi, I am trying to have a searchable tree @@@@ This works without the search and shows the whole tree and the orphans without parents: select case when connect_by_isleaf = 1 then 0 when level = 1 then 1 else -1 end as status, level, case when length(NAME) >20 then substr(NAME,1,20)||'...' else NAME end as name, 'myclass' as icon, "CHILD" as value, NAME as tooltip, 'f?
On its face, the relational database management system would appear to be a very poor tool for representing and manipulating trees. This chapter is designed to accomplish the following things: show you that a row in an SQL database can be thought of as an object show you that a pointer from one object to another can be represented by storing an integer key in a regular database column demonstrate the Oracle tree extensions (CONNECT BY ... PRIOR) show you how to work around the limitations of CONNECT BY with PL/SQL The canonical example of trees in Oracle is the org chart.