Collection

Collection is an Ordered group of elements, all of the same type.

Attributes of Collection

1.  FIRST
2.  LAST
3.  COUNT
4.  DELETE
5.  EXTAND
6.  TRIM
7.  NEXT
8.  EXIST
9.  PRIOR
10. LIMIT

Types of Collection

1.  Varray
2.  Nested Table
3.  PL/SQL Table or Associate Array

Varray:-
Varray stands of variable size array.Varray can be stored in the column of table.

Syntax of Varray:- Type type_name is VARRAY(length) of data_type;

Examples of Varray

1.

DECLARE
TYPE L_VAR IS VARRAY(10) OF VARCHAR2(3);
L_VAR1 L_VAR;
BEGIN
L_VAR1:=L_VAR(‘A’,’B’,’C’,’D’,’E’,’F’,’G’,’H’);
FOR I IN 1..8
LOOP
DBMS_OUTPUT.PUT_LINE(L_VAR1(I));
END LOOP;
END;

2.

DECLARE
TYPE L_VAR IS VARRAY(10) OF VARCHAR2(3);
L_VAR1 L_VAR;
BEGIN
L_VAR1:=L_VAR(‘A’,’B’,’C’,’D’,’E’,’F’,’G’,’H’);
FOR I IN L_VAR1.FIRST..L_VAR1.COUNT
LOOP
DBMS_OUTPUT.PUT_LINE(L_VAR1(I));
END LOOP;
END;

3.

DECLARE
TYPE L_VAR IS VARRAY(10) OF VARCHAR2(10);
L_VAR1 L_VAR:= L_VAR();
BEGIN
L_VAR1.EXTEND;
L_VAR1(1):=’HELLO’;
L_VAR1.EXTEND;
L_VAR1(2):= ‘ORACLE’;
L_VAR1.EXTEND;
L_VAR1(3):=’JAVA’;
L_VAR1.EXTEND;
L_VAR1(4):= ‘OAF’;
FOR I IN 1..4
LOOP
DBMS_OUTPUT.PUT_LINE(L_VAR1(I));
END LOOP;
END;

4.

DECLARE
CURSOR C1 IS
SELECT PO_HEADER_ID
FROM PO_HEADERS_ALL
WHERE ROWNUM<=100;
TYPE L_HDR IS VARRAY(100) OF PO_HEADERS_ALL.PO_HEADER_ID%TYPE;
L_HDR1 L_HDR:= L_HDR();
COUNTER NUMBER:=0;
BEGIN
FOR I IN C1
LOOP
COUNTER:= COUNTER+1;
L_HDR1.EXTEND;
L_HDR1(COUNTER):= I.PO_HEADER_ID;
DBMS_OUTPUT.PUT_LINE('PO_HEADER_ID IS '||L_HDR1(COUNTER));
END LOOP;
END;

5.

DECLARE
CURSOR C1 IS
SELECT PO_HEADER_ID
FROM PO_HEADERS_ALL
WHERE ROWNUM<=100;
TYPE L_HDR IS VARRAY(100) OF PO_HEADERS_ALL.PO_HEADER_ID%TYPE;
L_HDR1 L_HDR:=L_HDR();
COUNTER NUMBER:=0;
BEGIN
OPEN C1;
FOR I IN 1..100
LOOP
COUNTER:= COUNTER+1;
L_HDR1.EXTEND;
FETCH C1 INTO L_HDR1(COUNTER);
DBMS_OUTPUT.PUT_LINE('PO_HEADER_ID IS '||L_HDR1(COUNTER));
END LOOP;
END;

Nested Table:-
Nested table is like a one-dimensional array.

Syntax of Nested Table:-   TYPE type_name IS TABLE OF data_type;

Example of Nested Table

1.

DECLARE
TYPE L_TAB IS TABLE OF NUMBER;
L_TAB1 L_TAB;
BEGIN
L_TAB1:= L_TAB(1,2,3,4,5);
FOR I IN 1..5
LOOP
DBMS_OUTPUT.PUT_LINE(L_TAB1(I));
END LOOP;
END;

2.

DECLARE
TYPE L_TAB IS TABLE OF NUMBER;
L_TAB1 L_TAB;
BEGIN
L_TAB1:= L_TAB(1,2,3,4,5);
FOR I IN L_TAB.FIRST..L_TAB1.LAST
LOOP
DBMS_OUTPUT.PUT_LINE(L_TAB1(I));
END LOOP;
END;

3.

DECLARE
CURSOR C_HDR IS
SELECT PO_HEADER_ID
FROM PO_HEADERS_ALL
WHERE ROWNUM<=100;
TYPE L_TAB_HDR IS TABLE OF PO_HEADERS_ALL.PO_HEADER_ID%TYPE;
L_HDR L_TAB_HDR:= L_TAB_HDR();
COUNTER NUMBER:=0;
BEGIN
FOR I IN C_HDR
LOOP
COUNTER:= COUNTER+1;
L_HDR.EXTEND;
L_HDR(COUNTER):= I.PO_HEADER_ID;
DBMS_OUTPUT.PUT_LINE(L_HDR(COUNTER));
END LOOP;
END;

4.

DECLARE
CURSOR C_HDR IS
SELECT PO_HEADER_ID
FROM PO_HEADERS_ALL
WHERE ROWNUM<=100;
TYPE L_TAB_HDR IS TABLE OF PO_HEADERS_ALL.PO_HEADER_ID%TYPE;
L_HDR L_TAB_HDR:= L_TAB_HDR();
COUNTER NUMBER:=0;
BEGIN
OPEN C_HDR;
FOR I IN 1..100
LOOP
COUNTER:= COUNTER+1;
L_HDR.EXTEND;
FETCH C_HDR INTO L_HDR(COUNTER);
DBMS_OUTPUT.PUT_LINE(L_HDR(COUNTER));
END LOOP;
END;

5.

DECLARE
CURSOR C_HDR IS
SELECT *
FROM PO_HEADERS_ALL
WHERE ROWNUM<=100;
TYPE L_TAB_HDR IS TABLE OF PO_HEADERS_ALL%ROWTYPE;
L_HDR L_TAB_HDR:= L_TAB_HDR();
COUNTER NUMBER:=0;
BEGIN
OPEN C_HDR;
FOR I IN 1..100
LOOP
COUNTER:= COUNTER+1;
L_HDR.EXTEND;
FETCH C_HDR INTO L_HDR(COUNTER);
DBMS_OUTPUT.PUT_LINE('HEADER ID'||CHR(9)||L_HDR(COUNTER).PO_HEADER_ID||CHR(9)||'PO NUMBER'||CHR(9)||L_HDR(COUNTER).SEGMENT1);
END LOOP;
END;

PL/SQL Table:-
PL/SQL Table helps you moves bulk data. They can store column or rows of Oracle Data.

Syntax:- TYPE type_name is TABLE OF data_type
INDEX BY NUMBER/VARCHAR2/PLS_INTRGER/BINARY_INTEGER;

Example:-

1.

DECLARE
TYPE L_TAB IS TABLE OF NUMBER
INDEX BY PLS_INTEGER;
L_TAB1 L_TAB;
BEGIN
L_TAB1(1):=1;
L_TAB1(2):=2;
L_TAB1(3):=3;
L_TAB1(4):=4;
L_TAB1(5):=5;
FOR I IN L_TAB1.FIRST..L_TAB1.LAST
LOOP
DBMS_OUTPUT.PUT_LINE(L_TAB1(I));
END LOOP;
END;

2.

DECLARE
CURSOR C_HDR IS
SELECT PO_HEADER_ID,SEGMENT1
FROM PO_HEADERS_ALL
WHERE ROWNUM<=100;
TYPE L_TAB_HDR IS TABLE OF PO_HEADERS_ALL.SEGMENT1%TYPE
INDEX BY PLS_INTEGER;
L_HDR L_TAB_HDR;
COUNTER NUMBER:=0;
BEGIN
FOR I IN C_HDR
LOOP
COUNTER:= COUNTER+1;
L_HDR(COUNTER):= I.SEGMENT1;
DBMS_OUTPUT.PUT_LINE(L_HDR(COUNTER));
END LOOP;
END;

3.

DECLARE
CURSOR C_HDR IS
SELECT PO_HEADER_ID,SEGMENT1
FROM PO_HEADERS_ALL
WHERE ROWNUM<=100;
TYPE L_TAB_HDR IS TABLE OF PO_HEADERS_ALL.SEGMENT1%TYPE
INDEX BY PLS_INTEGER;
L_HDR L_TAB_HDR;
COUNTER NUMBER:=0;
BEGIN
FOR I IN C_HDR
LOOP
COUNTER:= COUNTER+1;
L_HDR(COUNTER):= I.SEGMENT1;
END LOOP;
FOR J IN 1..COUNTER
LOOP
DBMS_OUTPUT.PUT_LINE(L_HDR(J));
END LOOP;
END;

———————————————–

DECLARE
TYPE L_EMP_REC IS RECORD(
L_EMP_ID NUMBER,
L_NAME VARCHAR2(20),
L_SALARY NUMBER);
TYPE L_TAB IS TABLE OF L_EMP_REC;
L_TAB1 L_TAB;
BEGIN
SELECT EMPLOYEE_ID,LAST_NAME,SALARY
BULK COLLECT INTO L_TAB1
FROM EMPLOYEES;
FOR I IN L_TAB1.FIRST..L_TAB1.COUNT
LOOP
DBMS_OUTPUT.PUT_LINE(L_TAB1(I).L_EMP_ID||CHR(9)||L_TAB1(I).L_NAME);
END LOOP;
END;

DECLARE
TYPE L_EMP_REC IS RECORD(L_EMP_ID NUMBER,
L_NAME VARCHAR2(20),
L_DEPT_ID NUMBER,
L_SAL NUMBER,
L_HIRE_DATE DATE
);
TYPE L_TAB IS TABLE OF L_EMP_REC;
L_TAB1 L_TAB;
CURSOR C1 IS
SELECT EMPLOYEE_ID,
LAST_NAME,
DEPARTMENT_ID,
SALARY,
HIRE_DATE
FROM EMPLOYEES;
BEGIN
OPEN C1;
FETCH C1 BULK COLLECT INTO L_TAB1;
FOR I IN L_TAB1.FIRST..L_TAB1.COUNT
LOOP
DBMS_OUTPUT.PUT_LINE(L_TAB1(I).L_EMP_ID||CHR(9)||L_TAB1(I).L_NAME);
END LOOP;
END;

Let us say you are having Inventory Store.

You have Inventory Stores in two different countries like India and USA

You have installed Oracle Apps single instance and entered all the suppliers information, customers data, tax rules etc.

And your business requirement is like this, all the rules and the data corresponding to indian store shouldn't be applicable/available to American store and vice versa.

So to meet the above requirements you will define two operating units one for india and one for USA.

Now each operating unit will have an ID known as ORG ID.

And we use ORG ID to secure our business data.

Now to do transactions for indian operations you need to define one responsibility and attach indian ORG ID to this responsibility.By this an indian will not see any data/rules applicable to USA.

Similarly you will define another responsibility for USA and attach USA’s ORG ID to this responsibility so that an American's will not see any data/rules corresponding to India.

This is the concept of ORG ID.

Now let us see what is Organization ID

Within India you have got various branches in different parts of the country in different states like AP,UP,MP etc.

And the business requirement is like this in AP you will maintain stock of Rice,UP for Wheat and MP for Maize.

To meet this business requirement you will define 3 Inventory Organizations under Indian Operating Unit to maintain the respective stocks of the states..

Each Inventory Organization will have an Organization ID.

This is the outline of the differences between ORG ID and Organization ID.

Navigation: Inventory (Responsibility) >> Setup >> Organizations >> Organizations

Both operating unit and inventory organization are organizations defined in the Oracle EBS (E-Business Suite). They differ in the organization classification which is highlighted in the red box in below images.

The information about all the organizations (including inventory organizations) are available in HR_ORGANIZATION_UNITS table.

The information about all the operating units are available in the HR_OPERATING_UNITS table.

An inventory organization is uniquely identified by ORGANIZATION_ID.

An operating unit is uniquely identified by ORG_ID in different tables for which the value is the ORGANIZATION_ID from HR_OPERATING_UNITS table.

Queries:

SELECT *

  FROM hr_organization_units;

SELECT *

  FROM hr_operating_units;