多项选择题X 纠错

A. A role can be given to a maximum of 1000 users.
B. A user can have access to a maximum of 10 roles.
C. A role can have a maximum of 100 privileges contained in it.
D. Privileges are given to a role by using the CREATE ROLE statement.
E. A role is a named group of related privileges that can be granted to the user.
F. A user can have access to several roles, and several users can be assigned the same role.

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A. A single row subquery can retrieve data from only one table.
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单项选择题

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A. SELECT TO CNAR(2000,  ‘$#,###.##’)   FROM dual;
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单项选择题

A.SELECT student_id, semester_end, gpa FROM student_grades ORDER BY semester_end DESC, gpa DESC;
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