评估EMPLOYEE表的结构: EMPLOYEE_IDNUMBER(9) LAST_NAMEVARCHAR2(25) FIRST_NAMEVARCHAR2(25) DEPARTMENT_IDNUMBER(9) MANAGER_IDNUMBER(9) SALARYNUMBER(7,2) 您使用以下哪条语句可将LAST_NAME列(当前包含200条记录)的长度增加到35个字节()
- A、ALTER employee TABLEAL TERCOLUMN(last_name VARCHAR2(35))
- B、ALTER TABLE employee RENAME last_name VARCHAR2(35)
- C、ALTER TABLE employee MODIFY(last_name VARCHAR2(35))
- D、不能增大LAST_NAME列的宽度
正确答案:C
答案解析:有
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