Creating Indexes

Creating an Index Explicitly

You can create indexes explicitly (outside of integrity constraints) using the SQL statement CREATE INDEX. The following statement creates an index named emp_ename for the ename column of the emp table:

CREATE INDEX emp_ename ON emp(ename)       TABLESPACE users       STORAGE (INITIAL 20K       NEXT 20k       PCTINCREASE 75);

Find more tutorials here. Creating Indexes