Example of global partitioned, global non-partitioned and local Indexes

Index on the partitioned table can be of three types.
1)Global Non-partitioned Index.
2)Global Partitioned Index.
3)Local Partitioned Index.

With an example I will make you clear of these three different types of indexes on the partitioned table.

1)Create a partitioned table.

CREATE TABLE test_partition
(
id number,
created_date  date,
col3 varchar2(20)
)
PARTITION BY RANGE (created_date)
   (
    PARTITION part1 VALUES LESS THAN (to_date('11-oct-2008','dd-mon-yyyy')) ,
    PARTITION part2 VALUES LESS THAN (to_date('12-oct-2008','dd-mon-yyyy')) ,
    PARTITION part3 VALUES LESS THAN (to_date('13-oct-2008','dd-mon-yyyy')) ,
    PARTITION part4 VALUES LESS THAN (to_date('14-oct-2008','dd-mon-yyyy')) ,
    PARTITION junk VALUES LESS THAN (MAXVALUE)
  )
/
Table created.

Global Non Partitioned Index
This index span all over the table. Hence it is global and index is not partitioned.
SQL> create index tpid_i on test_partition(id);

Index created.

SQL> select index_name,partitioned, index_type from user_indexes where table_name='TEST_PARTITION';

INDEX_NAME                     PAR INDEX_TYPE
------------------------------ --- ---------------------------
TPID_I                         NO  NORMAL

Local Partitioned Index

SQL> create index tpid_i on test_partition(id) local;

Index created.

SQL> select index_name,partitioned, index_type from user_indexes where table_name='TEST_PARTITION';

INDEX_NAME                     PAR INDEX_TYPE
------------------------------ --- ---------------------------
TPID_I                         YES NORMAL

SQL> select partition_name, status from user_ind_partitions where
 2      index_name = 'TPID_I';

PARTITION_NAME                 STATUS
------------------------------ --------
JUNK                           USABLE
PART1                          USABLE
PART2                          USABLE
PART3                          USABLE
PART4                          USABLE

Global Partitioned Index

CREATE INDEX tpid_g ON test_partition(id)
  GLOBAL PARTITION BY RANGE (id)
     (PARTITION p1 VALUES LESS THAN (10),
      PARTITION p2 VALUES LESS THAN (20),
      PARTITION p3 VALUES LESS THAN (MAXVALUE));
Index created.
SQL> select index_name,partitioned, index_type from user_indexes where table_name='TEST_PARTITION';

INDEX_NAME                     PAR INDEX_TYPE
------------------------------ --- ---------------------------
TPID_G                         YES NORMAL

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