如何为下面的子查询编写相关子查询？
How to write a correlated subquery for the below one?
谁能帮我为下面的非相关子查询编写相关子查询？
SELECT e.emp_no,e.last_name FROM employees e,dept_emp d
WHERE e.emp_no = d.emp_no
AND d.dept_no = (SEELCT dept_no FROM dept_emp WHERE emp_no =
(SELECT emp_no FROM employees WHERE first_name = "Margareta" AND last_name = "Markovitch"));
这是上述查询的答案：
Select E.Emp_No,E.Last_Name From Employees E Where Exists
( Select Dept_No From Dept_Emp D Where E.Emp_No=D.Emp_No)
And emp_no In (Select emp_no From Employees Where First_Name='Margareta' And Last_Name='Markovitch');
谁能帮我为下面的非相关子查询编写相关子查询？
SELECT e.emp_no,e.last_name FROM employees e,dept_emp d
WHERE e.emp_no = d.emp_no
AND d.dept_no = (SEELCT dept_no FROM dept_emp WHERE emp_no =
(SELECT emp_no FROM employees WHERE first_name = "Margareta" AND last_name = "Markovitch"));
这是上述查询的答案：
Select E.Emp_No,E.Last_Name From Employees E Where Exists ( Select Dept_No From Dept_Emp D Where E.Emp_No=D.Emp_No) And emp_no In (Select emp_no From Employees Where First_Name='Margareta' And Last_Name='Markovitch');