APEX_ITEM

You can use the APEX_ITEM package to create form elements dynamically based on a SQL query instead of creating individual items page by page.

It's sometime necessary that you need to use Item(apex_item) in page,like you want show something when query runs.

Apex_Item will work same as inbuilt option of creating items with Name,Id,Class.

There are several more apex_item which will be useful.

https://docs.oracle.com/cd/E59726_01/doc.50/e39149/apex_item.htm#AEAPI199

You can also check Demo which will demonstrate how you can create such items.

If Link Changes in Future then below will be some of the Apex_items you can search and use.

CHECKBOX2 Function
DATE_POPUP Function
DATE_POPUP2 Function
DISPLAY_AND_SAVE Function
HIDDEN Function
MD5_CHECKSUM Function
MD5_HIDDEN Function
POPUP_FROM_LOV Function
POPUP_FROM_QUERY Function
POPUPKEY_FROM_LOV Function
POPUPKEY_FROM_QUERY Function
RADIOGROUP Function
SELECT_LIST Function
SELECT_LIST_FROM_LOV Function
SELECT_LIST_FROM_LOV_XL Function
SELECT_LIST_FROM_QUERY Function
SELECT_LIST_FROM_QUERY_XL Function
TEXT Function
TEXTAREA Function
TEXT_FROM_LOV Function

TEXT_FROM_LOV_QUERY Function

Example:

SELECT 
    empno, 
    APEX_ITEM.HIDDEN(1,empno)||
    APEX_ITEM.TEXT(2,ename) ename, 
    APEX_ITEM.TEXT(3,job) job, 
    mgr, 
    APEX_ITEM.DATE_POPUP(4,rownum,hiredate,'dd-mon-yyyy') hd,
  FROM emp
ORDER BY 1

In above Example
--.HIDDEN item will be hidden on page(for storing Id you can use this feature)
-- .TEXT with display a text item
-- .DATE_POPUP date popup will be created