Creating index

Question

How do i create indexes for the create table statement below?
CREATE table Position (PositionID number(20) not null, title nvarchar2(255), SkillSetID number(20),
TaskSetID number(20), filledByResumeID number(20), filledOnDate nvarchar2(40), description nvarchar2(700),
totalForceIntegratedMetric nvarchar2(255));
COMMENT on table Position is 'This is the main table of the Position model. It contains key elements of the position like the associated SkillSet, as well as what Sailor is filling the position.';
CREATE table financial (PositionID number(20) not null, ID number(20) not null, type nvarchar2(255),
title nvarchar2(255), value nvarchar2(255), code nvarchar2(255), startDate nvarchar2(40), endDate nvarchar2(40),
note nvarchar2(700));
COMMENT on table financial is 'This table specifies all the financial information relevant to the position and its associated jobs, including paygrade, bonuses, incentive pay.';
ALTER table financial add constraint FKfinancial922884 foreign key (PositionID) references Position;

Answer 1

How do i create indexes for the create table statement below?Index creation is mostly governed by the way you are going to query these tables. If you know in advance the record population criteria, you can create indexes as per your need.
Its not possible to point out how indexes should be created based on just the create table statements.
ALTER table financial add constraint FKfinancial922884 foreign key (PositionID) references Position; Does this statement really work? There are no primary or unique keys defined on Position table that can be referenced (well, at least from what you have posted here).