Re: [問題] 資料庫的問題...
※ 引述《Likefeeling (想來場心靈的裸奔)》之銘言：
: Examine the data of the EMPLOYEES table.
: EMPLOYEES (EMPLOYEE_ID is the primary key. MGR_ID is the ID of managers
: and refers to the EMPLOYEE_ID)
: EMPLOYEE_ID EMP_NANE DEPT_ID MGR_ID JOB_ID SALARY
: 101 Smith 20 120 SA_REP 4000
: 102 Martin 10 105 CLERK 2500
: 103 Chris 20 120 IT_ADMIN 4200
: 104 John 30 108 HR_CLERK 2500
: 105 Diana 30 108 HR_MGR 5000
: 106 Bryan 40 110 AD_ASST 3000
: 108 Jennifer 30 110 HR_DIR 6500
: 110 Bob 40 EX_DIR 8000
: 120 Ravi 20 110 SA_DIR 6500
: Evaluate this SQL statement AND WRITE DOWN its output?:
: SELECT e.employee_id "Emp_id", e.emp_name "Employee", e.salary,
: m.employee_id "Mgr_id", m.emp_name "Manager"
: FROM employees e, employees m
: WHERE e.mgr_id = m.employee_id
: AND e.salary > 4000;
: 題目就是這樣...請問這一題要算什麼?
: 要怎麼解...題目都看不懂...請各位大大幫幫忙:P
不知道你有沒有正確答案?
輸出結果：
Emp_id Employee e.salary Mgr_id Manager
120 Ravi 4200 120 IT_ADMIN
108 Jennifer 5000 108 HR_MGR
110 Bob 6500 110 HR_DIR
110 Bob 6500 110 SA_DIR
其實我不是很確定...= =?有錯請大家盡量糾正= =+
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