I shared a data entry example form here in this post for Oracle Forms beginner developers, so that they may take an idea to how to develop a simple data entry form in Oracle Forms. The form can be fully modified.
Example is given for an emp table and other related tables. You can download Emp.fmb form from Google drive by clicking here Emp.Fmb Form
To run this form you would require some tables in Payroll schema, so create a user/schema with name Payroll and run the following script:
-- start
CREATE TABLE DESIG
(
 DNAME VARCHAR2(60 BYTE)
);
CREATE TABLE DEPT
(
 DNAME VARCHAR2(60 BYTE)
)
;
CREATE TABLE EMP
(
 ECODE    VARCHAR2(10 BYTE),
 ENAME    VARCHAR2(60 BYTE),
 DESIG    VARCHAR2(60 BYTE),
 DEPT     VARCHAR2(60 BYTE),
 ADDR1    VARCHAR2(60 BYTE),
 ADDR2    VARCHAR2(60 BYTE),
 CITY     VARCHAR2(30 BYTE),
 STATE    VARCHAR2(30 BYTE),
 PINCODE  VARCHAR2(6 BYTE),
 PHONE    VARCHAR2(30 BYTE),
 DOJ      DATE,
 DOR      DATE,
 DOP      DATE,
 PFNO     VARCHAR2(30 BYTE),
 ESINO    VARCHAR2(60 BYTE),
 BASIC    NUMBER(10)                         DEFAULT 0,
 HRA      NUMBER(10)                         DEFAULT 0,
 CONV     NUMBER(10)                         DEFAULT 0,
 MEDC     NUMBER(10)                         DEFAULT 0,
 BONUS    NUMBER(10)                         DEFAULT 0,
 TEL      NUMBER(10)                         DEFAULT 0,
 OTHA     NUMBER(10)                         DEFAULT 0,
 CL       NUMBER(3)                          DEFAULT 0,
 EL       NUMBER(5)                          DEFAULT 0,
 SL       NUMBER(3)                          DEFAULT 0,
 PFA      NUMBER(10)                         DEFAULT 0,
 TDS      NUMBER(10)                         DEFAULT 0,
 TDSMB    NUMBER(2)                          DEFAULT 0,
 ADVTOTAL NUMBER(10)                         DEFAULT 0,
 ADVDED   NUMBER(10)                         DEFAULT 0,
 BANKAC   VARCHAR2(50 BYTE),
 FY       VARCHAR2(9 BYTE),
 CP       VARCHAR2(30 BYTE),
 FYCP     VARCHAR2(40 BYTE),
 ESI      NUMBER(10,2),
 TDSDED   NUMBER(10,2)
)
;
CREATE TABLE FYCPT
(
 FY   VARCHAR2(9 BYTE),
 CP   VARCHAR2(30 BYTE),
 FYCP VARCHAR2(40 BYTE)
)
;
CREATE TABLE MNTRANS
(
 TRANID     NUMBER(10),
 TRANDATE   DATE,
 ECODE      VARCHAR2(10 BYTE),
 ENAME      VARCHAR2(60 BYTE),
 NOOFABS    NUMBER(3),
 NOOFWD     NUMBER(3),
 NETBASIC   NUMBER(10,2),
 NETCONV    NUMBER(10,2),
 NETMED     NUMBER(10,2),
 NETBONUS   NUMBER(10,2),
 NETTEL     NUMBER(10,2),
 NETHRA     NUMBER(10),
 OT_HRS     NUMBER(10),
 OT_HRSAMT  NUMBER(10,2),
 OT_SAL     NUMBER(10,2),
 OTHER_A    NUMBER(10),
 GRS_SAL    NUMBER(10,2),
 PFA        NUMBER(10),
 ESIA       NUMBER(10),
 TDS        NUMBER(10,2),
 ADVI       NUMBER(10),
 OTH_DED    NUMBER(10),
 NETPAYABLE NUMBER(10,2),
 CLT        NUMBER(2),
 ELT        NUMBER(2),
 SLT        NUMBER(2),
 TL         NUMBER(2),
 CAA        VARCHAR2(1 BYTE),
 FY         VARCHAR2(9 BYTE),
 CP         VARCHAR2(30 BYTE),
 FYCP       VARCHAR2(40 BYTE),
 FOR_MNTH   VARCHAR2(20 BYTE),
 FOR_YEAR   NUMBER(4)
)
LOGGING
NOCOMPRESS
NOCACHE
NOPARALLEL
MONITORING;
SET DEFINE OFF;
Insert into DEPT
  (DNAME)
 Values
  ('COMMERCIAL');
Insert into DEPT
  (DNAME)
 Values
  ('MAINT & SUPPORT');
Insert into DEPT
  (DNAME)
 Values
  ('SYSTEMS');
Insert into DEPT
  (DNAME)
 Values
  ('OPERATIONS');
Insert into DEPT
  (DNAME)
 Values
  ('QUALITY CONTROL');
Insert into DEPT
  (DNAME)
 Values
  ('ACCOUNTS');
Insert into DEPT
  (DNAME)
 Values
  ('PACKING & DISPATCH');
Insert into DEPT
  (DNAME)
 Values
  ('ADMINISTRATION');
Insert into DEPT
  (DNAME)
 Values
  ('STORE');
Insert into DEPT
  (DNAME)
 Values
  ('MAINTENANCE');
Insert into DEPT
  (DNAME)
 Values
  ('DESIGNING');
Insert into DEPT
  (DNAME)
 Values
  ('PURCHASE & STORE');
COMMIT;
SET DEFINE OFF;
Insert into DESIG
  (DNAME)
 Values
  ('AGM');
Insert into DESIG
  (DNAME)
 Values
  ('CHIEF MANAGER');
Insert into DESIG
  (DNAME)
 Values
  ('SR. MANAGER');
Insert into DESIG
  (DNAME)
 Values
  ('MANAGER');
Insert into DESIG
  (DNAME)
 Values
  ('SCY. TO CMD & COMPLIANCE OFFICER');
Insert into DESIG
  (DNAME)
 Values
  ('DY. MANAGER');
Insert into DESIG
  (DNAME)
 Values
  ('ASST. MANAGER');
Insert into DESIG
  (DNAME)
 Values
  ('SR. EXECUTIVE');
Insert into DESIG
  (DNAME)
 Values
  ('EXECUTIVE');
Insert into DESIG
  (DNAME)
 Values
  ('OMR OPERATOR');
Insert into DESIG
  (DNAME)
 Values
  ('SR. ASSISTANT');
Insert into DESIG
  (DNAME)
 Values
  ('ASSISTANT');
Insert into DESIG
  (DNAME)
 Values
  ('MANAGER SYSTEMS');
COMMIT;
SET DEFINE OFF;
Insert into EMP
  (ECODE, ENAME, DESIG, DEPT, ADDR1,
   ADDR2, CITY, STATE, PINCODE, PHONE,
   DOJ, DOR, DOP, PFNO, ESINO,
   BASIC, HRA, CONV, MEDC, BONUS,
   TEL, OTHA, CL, EL, SL,
   PFA, TDS, TDSMB, ADVTOTAL, ADVDED,
   BANKAC, FY, CP, FYCP, ESI,
   TDSDED)
 Values
  ('1000', 'ABC', 'xyz', 'abc', NULL,
   NULL, 'NEW DELHI', 'DELHI', '110020', NULL,
   TO_DATE('08/01/2010 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), NULL, NULL, '12345', '654123',
   8000, 2500, 500, 1000, 5000,
   500, 250, 7, 31, 8,
   780, 1000, 5, 10000, 500,
   '254252525632548', '2010-2011', 'LTD.', '2010-2011 INTERNATIONAL LTD.', 210,
   NULL);
Insert into EMP
  (ECODE, ENAME, DESIG, DEPT, ADDR1,
   ADDR2, CITY, STATE, PINCODE, PHONE,
   DOJ, DOR, DOP, PFNO, ESINO,
   BASIC, HRA, CONV, MEDC, BONUS,
   TEL, OTHA, CL, EL, SL,
   PFA, TDS, TDSMB, ADVTOTAL, ADVDED,
   BANKAC, FY, CP, FYCP, ESI,
   TDSDED)
 Values
  ('93', 'VINISH KAPOOR', 'MANAGER SYSTEMS', 'OPERATIONS', 'MARIYAM NAGAR',
   NULL, 'GHAZIABAD', 'UP', '110020', '9540377373',
   TO_DATE('01/10/2011 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), NULL, NULL, NULL, NULL,
   10000, 4000, 1000, 1000, 5000,
   1000, 2000, 7, 31, 8,
   780, 2000, 2, 50000, 1000,
   NULL, '2010-2011', 'INTERNATIONAL LTD.', '2010-2011 INTERNATIONAL LTD.', 0,
   NULL);
Insert into EMP
  (ECODE, ENAME, DESIG, DEPT, ADDR1,
   ADDR2, CITY, STATE, PINCODE, PHONE,
   DOJ, DOR, DOP, PFNO, ESINO,
   BASIC, HRA, CONV, MEDC, BONUS,
   TEL, OTHA, CL, EL, SL,
   PFA, TDS, TDSMB, ADVTOTAL, ADVDED,
   BANKAC, FY, CP, FYCP, ESI,
   TDSDED)
 Values
  ('93993', 'VIN', 'AGM', 'ACCOUNTS', NULL,
   NULL, 'NEW DELHI', 'DELHI', '110020', NULL,
   TO_DATE('01/01/2000 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), NULL, NULL, NULL, NULL,
   33333, 0, 0, 0, 0,
   0, 0, 7, 31, 8,
   780, NULL, 1, NULL, NULL,
   NULL, 'FY', 'FY', 'FY', 0,
   NULL);
COMMIT;
SET DEFINE OFF;
Insert into FYCPT
  (FY, CP, FYCP)
 Values
  ('2010-2011', 'INTERNATIONAL LTD.', '2010-2011 INTERNATIONAL LTD.');
COMMIT;
-- end