varchar type are case sensitive

    
SQL>
SQL> CREATE TABLE product (
  2       product_name     VARCHAR2(25),
  3       product_price    NUMBER(4,2),
  4       quantity_on_hand NUMBER(5,0),
  5       last_stock_date  DATE);

Table created.

SQL>
SQL> INSERT INTO product VALUES ('Small Widget', 99, 1, '15-JAN-03');

1 row created.

SQL> INSERT INTO product VALUES ('Medium Widget', 75, 1000, '15-JAN-02');

1 row created.

SQL> INSERT INTO product VALUES ('Product Number', 50, 100, '15-JAN-03');

1 row created.

SQL>
SQL>
SQL>
SQL> UPDATE product
  2  SET    product_name = 'Product Number'
  3  WHERE  product_name = 'product Number';

0 rows updated.

SQL>
SQL>
SQL> DROP TABLE product;

Table dropped.

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varchar type are case sensitive : VARCHAR2 « Data Type « Oracle PL / SQL

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