问题:
Click the Exhibit button to examine the data of the EMPLOYEES table. Evaluate this SQL statement:
SELECT e.employee_id "Emp_id", e.emp_name "Employee", e.salary, m.employee_id "Mgr_id", m.emp_name "Manager"
FROM employees e JOIN employees m ON (e.mgr_id = m.employee_id)
AND e.salary > 4000;
What is its output?()
A . A
B . B
C . C
D . D
E . E
Click the Exhibit button to examine the data of the EMPLOYEES table. Evaluate this SQL statement:
SELECT e.employee_id "Emp_id", e.emp_name "Employee", e.salary, m.employee_id "Mgr_id", m.emp_name "Manager"
FROM employees e JOIN employees m ON (e.mgr_id = m.employee_id)
AND e.salary > 4000;
What is its output?()
● 参考解析
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