單項(xiàng)選擇題

Which SQL statement generates the alias Annual Salary for the calculated column SALARY*12?（）

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

你可能感興趣的試題

單項(xiàng)選擇題

What is true about sequences?（）

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.

單項(xiàng)選擇題

In which scenario would index be most useful?（）

A. The indexed column is declared as NOT NULL.
B. The indexed columns are used in the FROM clause.
C. The indexed columns are part of an expression.
D. The indexed column contains a wide range of values.