• Arun Kumar

Oracle Table and Tables Cluster

In this article we will creating a table cluster inside Oracle. We will also be creating couple of tables inside the cluster table.


Create Cluster Table

CREATE CLUSTER employees_departments_cluster
(department_id NUMBER(2));


Create Index on Cluster Table


Without create an index on cluster table, you cannot proceed. This is an Index Cluster

CREATE INDEX idx_emp_dept_cluster ON CLUSTER employees_departments_cluster;


Create Tables Inside Cluster


Create tables inside cluster based on cluster key column

CREATE TABLE EMP_CLUST 
CLUSTER employees_departments_cluster (deptno)
as select * from emp;
CREATE TABLE DEPT_CLUST 
CLUSTER employees_departments_cluster (deptno)
as select * from dept;


Drop Table Inside Cluster

DROP TABLE EMP_CLUST;
DROP TABLE DEPT_CLUST;


Drop Cluster

DROP CLUSTER employees_departments_cluster

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