The document outlines the steps to perform range partitioning on an existing Oracle table: 1. Enable DBMS_REDEFINITION on the existing table and create the partitioned table. 2. Start the redefinition process to migrate the data from the original table to the partitioned table. 3. Finish the redefinition once the data migration is complete. Drop the partitioned table and enable row movement on the original table to complete the partitioning process.

1. Table Partition steps is Oracle
1. List Partition.
2. Range Partition.
3. Hash Partition.
RangePartitionSteps:
Existing table is here
ExistingTable.sql
Step1: EnableDBMS_REDEFINITIONforexistingtable
EXECDBMS_REDEFINITION.CAN_REDEF_TABLE('HR','EMPLOYEES');
Step2:Create Partitiontable, Partitiontableattached in the doc.
Range_Partition.txt
Step3:ChangeInitransvalueforPartition tableas perexistingtable
Alter Table HR.EMPLOYEES_REDEFInitrans 1;
Step 4: Start START_REDEF_TABLE forpartitiontable
EXECDBMS_REDEFINITION.START_REDEF_TABLE ('HR','EMPLOYEES','EMPLOYEES_REDEF');
Step 5: CreateUniqueIndex, primarykey,foreignkeyforthis partitiontable.
Unique_primary_foreign.sql
Check count of existing and partition table
select count(*) from EMPLOYEES_REDEF;
--107
select count(*) from EMPLOYEES;
--107
Now insert one row in employees table now checkcount EMPLOYEEStable
select count(*) from EMPLOYEES;
--108
But Still 107 rows in partition table
select count(*) from EMPLOYEES_REDEF;
--107

2. Step 6: FinishFINISH_REDEF_TABLE forpartitiontable
EXECDBMS_REDEFINITION.FINISH_REDEF_TABLE ('HR','EMPLOYEES','EMPLOYEES_REDEF');
Check count of existing and partition table
select count(*) from EMPLOYEES_REDEF;
--108
select count(*) from EMPLOYEES;
--108
Step 7: RowMovementenableanddropthe partitiontable
Alter table HR.EMPLOYEESenablerow movement;
DROP TABLE EMPLOYEES_REDEFcascadeconstraints;
Now checkstructure of existing employees table
After_partition.sql
For List and Hash Partition used same Steps, only differencepartition table create.
SampleList Partitiontable CreationScripts
Sample_list_partition.sql
SampleHashPartitiontableCreationScripts
Hash_Parttion.sql