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Oracle认证考试

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Examine the structure of the EMPLOYEES table: Column name Data type Remarks EMPLOYEE_ID NUMBER NOT NULL, Primary Key LAST_NAME VARCNAR2(30) FIRST_NAME VARCNAR2(30) JOB_ID NUMBER SAL NUMBER MGR_ID NUMBER References EMPLOYEE_ID column DEPARTMENT_ID NUMBER You need to create an index called NAME_IDX on the first name and last name fields of the EMPLOYEES table. Which SQL statement would you use to perform this task? ()

  • A、CREATE INDEX NAME _IDX (first_name, last_name);
  • B、CREATE INDEX NAME _IDX (first_name, AND last_name)
  • C、CREATE INDEX NAME_IDX ON (First_name, last_name);
  • D、CREATE INDEX NAME_IDX ON employees (First_name, AND last_name);
  • E、CREATE INDEX NAME_IDX ON employees (First_name, last_name);
  • F、CREATE INDEX NAME_IDX FOR employees (First_name, last_name);
正确答案:E
答案解析:
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