试题详情
单项选择题您要对EMPLOYEES表的FIRST_NAME和LAST_NAME列创建一个组合索引。以下哪条语句将完成此任务()

A、CREATE INDEXfl_idx ON employees(first_name last_name)

B、CREATE INDEXfl_idx ON employees(first_name),employees(last_name)

C、CREATE INDEXfl_idx ON employees(first_name,last_name)

D、CREATE INDEXfl_idx ON employees(first_name);CREATE INDEXfl_idx ON employees(last_name)

  • C
  • 关注下方微信公众号,在线模考后查看

热门试题