你可能感興趣的試題

A. SELECT ename, salary*12 ‘Annual Salary’   FROM employees;
B. SELECT ename, salary*12 “Annual Salary”   FROM employees;
C. SELECT ename, salary*12 AS Annual Salary   FROM employees;
D. SELECT ename, salary*12 AS INITCAP(“ANNUAL SALARY”)   FROM employees

A. Once created, a sequence belongs to a specific schema.
B. Once created, a sequence is linked to a specific table.
C. Once created, a sequence is automatically available to all users.
D. Only the DBA can control which sequence is used by a certain table.
E. Once created, a sequence is automatically used in all INSERT and UPDATE statements.