Created
December 17, 2018 03:31
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SQL Query Question
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/* return highest salary, employee name, deparment name for each department */ | |
/* | |
+----------------------+ | |
| Tables_in_employees | | |
+----------------------+ | |
| current_dept_emp | | |
| departments | | |
| dept_emp | | |
| dept_emp_latest_date | | |
| dept_manager | | |
| employees | | |
| salaries | | |
| titles | | |
+----------------------+ | |
mysql> desc dept_emp; | |
+-----------+---------+------+-----+---------+-------+ | |
| Field | Type | Null | Key | Default | Extra | | |
+-----------+---------+------+-----+---------+-------+ | |
| emp_no | int(11) | NO | PRI | NULL | | | |
| dept_no | char(4) | NO | PRI | NULL | | | |
| from_date | date | NO | | NULL | | | |
| to_date | date | NO | | NULL | | | |
+-----------+---------+------+-----+---------+-------+ | |
mysql> desc departments; | |
+-----------+-------------+------+-----+---------+-------+ | |
| Field | Type | Null | Key | Default | Extra | | |
+-----------+-------------+------+-----+---------+-------+ | |
| dept_no | char(4) | NO | PRI | NULL | | | |
| dept_name | varchar(40) | NO | UNI | NULL | | | |
+-----------+-------------+------+-----+---------+-------+ | |
mysql> desc employees; | |
+------------+---------------+------+-----+---------+-------+ | |
| Field | Type | Null | Key | Default | Extra | | |
+------------+---------------+------+-----+---------+-------+ | |
| emp_no | int(11) | NO | PRI | NULL | | | |
| birth_date | date | NO | | NULL | | | |
| first_name | varchar(14) | NO | | NULL | | | |
| last_name | varchar(16) | NO | | NULL | | | |
| gender | enum('M','F') | NO | | NULL | | | |
| hire_date | date | NO | | NULL | | | |
+------------+---------------+------+-----+---------+-------+\ | |
mysql> desc salaries; | |
+-----------+---------+------+-----+---------+-------+ | |
| Field | Type | Null | Key | Default | Extra | | |
+-----------+---------+------+-----+---------+-------+ | |
| emp_no | int(11) | NO | PRI | NULL | | | |
| salary | int(11) | NO | | NULL | | | |
| from_date | date | NO | PRI | NULL | | | |
| to_date | date | NO | | NULL | | | |
+-----------+---------+------+-----+---------+-------+ | |
*/ | |
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