Create table xyz ( 

abc	 (VARCHAR2(64))	 NOT NULL 

def (VARCHAR2(150))	 NOT NULL 

CONSTRAINT xyz_pk PRIMARY KEY (acb)); 

insert into xyz ('a:100','sa00230'); 

insert into xyz('a:1000','sa04514');

insert into xyz ('a:10000','a04010');

insert into xyz ('a:10000','a04012');