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Query Nested Table Data

How to query nested table column of a table without using table function?
Asked by: sandip01 | Member Since May-2010 | Asked on: May 25th, 2010

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Pooja

Answered On : Sep 3rd, 2012

There are two general ways to query a table that contains a collection type as a column or attribute. Nest the collections in the result rows that contain them. Distribute or unnest collections so that each collection element appears on a row by itself. 

Code
  1. SELECT d.dept_emps 
    2. 

  2.   FROM department_persons d;
DEPT_EMPS(IDNO, NAME, PHONE) ------------------------------------------------------------- PEOPLE_TYP(PERSON_TYP(1, John Smith, 1-650-555-0135), PERSON_TYP(2, Diane Smith, 1-650-555-0135)) 
Code
  1. SELECT e.* 
    2. 

  2.   FROM department_persons d, TABLE(d.dept_emps) e;
IDNO NAME PHONE ---------- ------------------------------ --------------- 1 John Smith 1-650-555-0135 2 Diane Smith 1-650-555-0135

  
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