COLLECTIONS

Collection Methods Example In Oracle

EXISTS:

--Collection Methods Example In Oracle: EXISTS

set serveroutput on;
declare
type t_num is table of number;
v_num t_num := t_num(1, 3, 5);
begin
if v_num.exists(1) then 
dbms_output.put_line('Element 1 exists.');
end if;
if v_num.exists(4) 

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Oracle Collection In SQL

Collection in SQL queries:

Only Nested Tables and Varrays can be used in Sql queries.

Because these are the persistent collections, so can be stored in database.

Nested Tables In SQL:

Creating Nested Table Object:

create 

…

Oracle Collection in PLSQL

Examples for Oracle Collection In PLSQL : Associative Arrays example:

Associative Arrays In Blocks:

--Examples for Oracle Collection In PLSQL : Associative Arrays In Blocks:

set serveroutput on;
declare
  type t_empid is table of employees.employee_id%type index 

…

Collections In Oracle

DEFINITION:

What are collections in Oracle?

A collection is a homogeneous single dimensional structure. It constitutes an ordered set of elements of similar type.

Since it's homogeneous structure all the elements are of same type. These types …