Oracle 11g Release 2

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WITH data1
     AS (SELECT TO_DATE ('01-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                100 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('02-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                100 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('03-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                100 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('04-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                100 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('05-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                100 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('06-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                100 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('07-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                100 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('08-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                100 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('09-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                100 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('10-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                100 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('11-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                100 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('12-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                105 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('13-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                105 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('14-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                105 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('15-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                105 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('16-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                105 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('17-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                105 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('18-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                105 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('19-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                105 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('20-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                105 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('21-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                105 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('22-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                105 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('23-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                130 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('24-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                130 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('25-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                130 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('26-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                130 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('27-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                130 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('28-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                130 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('29-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                130 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('30-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                130 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('31-01-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                145 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('01-02-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                145 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('02-02-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                145 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('03-02-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                145 amount
           FROM DUAL
         UNION
         SELECT TO_DATE ('04-02-18', 'DD-MM-YYYY') date_id,
                'A' product,
                'B' warehouse,
                145 amount
           FROM DUAL)
SELECT date_id,
       product,
       warehouse,
       amount
  FROM (SELECT date_id,
               product,
               warehouse,
               amount,
               LAG (amount)
                  OVER (PARTITION BY product, warehouse ORDER BY date_id)
                  amount_prev
          FROM data1) x
 WHERE amount <> amount_prev

DATE_ID	PRODUCT	WAREHOUSE	AMOUNT
12-JAN-18	A	B	105
23-JAN-18	A	B	130
31-JAN-18	A	B	145