▶ Create Table Options 더보기 CREATE TABLE employees ( employee_id NUMBER(6) CONSTRAINT emp_emp_id_pk PRIMARY KEY , first_name VARCHAR2(20) , last_name VARCHAR2(25) CONSTRAINT emp_last_name_nn NOT NULL , email VARCHAR2(25) CONSTRAINT emp_email_nn NOT NULL , CONSTRAINT emp_email_uk UNIQUE (email) , phone_number VARCHAR2(20) , hire_date DATE CONSTRAINT emp_hire_date_nn NOT NULL , job_id VARCHAR2(10) ..