单项选择题
A. CREATE ROLE manager; GRANT create table, create view TO manager; GRANT manager TO BLACK, CLARK;
B. CREATE ROLE manager; GRANT create table, create voew TO manager; GRANT manager ROLE TO BLACK, CLARK;
C. GRANT manager ROLE TO BLACK, CLARK; GRANT create table, create voew TO BLACK CLARK; ***MISSING***
单项选择题 Which one is a system privilege? ()
单项选择题 Which SQL statement displays the date March 19, 2001 in a format that appears as "Nineteenth of March 2001 12:00:00 AM"? ()
单项选择题 Evaluate these two SQL statements: SELECT last_name, salary, hire_dateFROM EMPLOYEES ORDRE BY salary DESC; SELECT last_name, salary, hire_dateFROM EMPOLYEES ORDER BY 2 DESC; What is true about them? ()