Analysis of EMPLOYEE_DTL:

• As of now, this example entity contains only sample of 2 records. In real time, this entity would store millions of records. In order to retrieve the data in a faster way, you have to create an additional column EMP_DTL_ID in EMPLOYEE_DTL and assign it as primary key.
• In our example, column EMP_DTL_ID will be populated through sequence initiated by a trigger and you can see the sequence code and trigger code in later sections.
• Eventhough SSN can be added as a primary key in EMPLOYEE_DTL table, you have to add a new column EMP_DTL_ID as the primary key to ensure the fastest retrieval of data.
  Tip:Wherever it is required, you have to create new columns.

Sample Source Data:

Entity Name	Table Name	Attribute Name	Column Name	Datatype	Null Option	Primary Key	Foreign Key
Employee Detail	EMPLOYEE_DTL	Employee Detail Identifier	EMP_DTL_ID	NUMBER	NOT NULL	Yes	No
Employee Detail	EMPLOYEE_DTL	Department Number	DPTMT_NUM	NUMBER(2)	NULL	No	Yes
Employee Detail	EMPLOYEE_DTL	Gender Code	GNDR_CD	VARCHAR2(10)	NOT NULL	No	Yes
Employee Detail	EMPLOYEE_DTL	First Name	FRST_NM	VARCHAR2(30)	NOT NULL	No	No
Employee Detail	EMPLOYEE_DTL	Last Name	LST_NM	VARCHAR2(30)	NOT NULL	No	No
Employee Detail	EMPLOYEE_DTL	Middle Name	MDLE_NM	VARCHAR2(30)	NULL	No	No
Employee Detail	EMPLOYEE_DTL	SSN	SSN	VARCHAR2(11)	NOT NULL	No	No
Employee Detail	EMPLOYEE_DTL	Birth Date	BRTH_DT	DATE	NOT NULL	No	No
Employee Detail	EMPLOYEE_DTL	Salary Amount	SLRY_AMT	NUMBER(7,2)	NOT NULL	No	No
Employee Detail	EMPLOYEE_DTL	DateTime Stamp	DTTM_STMP	DATE	NOT NULL	No	No

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Sample Data Analysis: Continued...       Create Object Commands