Oracle Create Table

CREATE TABLE ABC_TABLE(
    AAA VARCHAR2(10) NOT NULL,
    BBB NUMBER(2,0) NOT NULL,
    HTML CLOB NOT NULL,
    REGDATE VARCHAR2(14) DEFAULT TO_CHAR(SYSDATE, 'YYYYMMDDHH24MISS'),
    MODDATE VARCHAR2(14) DEFAULT TO_CHAR(SYSDATE, 'YYYYMMDDHH24MISS'),
    CONSTRAINT PK_ABC_TABLE PRIMARY KEY(AAA, BBB)
);