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q8
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omickeyee@omickeyee-HP-Pavilion-Laptop-15-cc1xx:~$ sudo mysql
[sudo] password for omickeyee:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 25
Server version: 8.0.29-0ubuntu0.22.04.2 (Ubuntu)
Copyright (c) 2000, 2022, Oracle and/or its affiliates.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> create database practical_q8;
Query OK, 1 row affected (0.01 sec)
mysql> use practical_q8;
Database changed
mysql> CREATE TABLE `practical_q8`.`employee` (
-> `emp_no` INT NOT NULL,
-> `emp_name` VARCHAR(100) NOT NULL,
-> `hiredate` DATE NOT NULL,
-> `commission` INT NOT NULL,
-> `netsalary` INT NOT NULL,
-> `dept_no` INT NOT NULL,
-> `designation` VARCHAR(20) NOT NULL,
-> PRIMARY KEY (`emp_no`));
Query OK, 0 rows affected (0.03 sec)
mysql> desc employee;
+-------------+--------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------------+--------------+------+-----+---------+-------+
| emp_no | int | NO | PRI | NULL | |
| emp_name | varchar(100) | NO | | NULL | |
| hiredate | date | NO | | NULL | |
| commission | int | NO | | NULL | |
| netsalary | int | NO | | NULL | |
| dept_no | int | NO | | NULL | |
| designation | varchar(20) | NO | | NULL | |
+-------------+--------------+------+-----+---------+-------+
7 rows in set (0.00 sec)
mysql> INSERT INTO `practical_q8`.`employee` (`emp_no`, `emp_name`, `hiredate`, `commission`, `netsalary`, `dept_no`, `designation`) VALUES ('1', 'emp_name_1', '2022-10-05', '1200', '11500', '30', 'Clerk');
Query OK, 1 row affected (0.00 sec)
mysql> INSERT INTO `practical_q8`.`employee` (`emp_no`, `emp_name`, `hiredate`, `commission`, `netsalary`, `dept_no`, `designation`) VALUES ('3', 'emp_name_2', '2021-12-28', '30000', '32000', '20', 'Clerk');
Query OK, 1 row affected (0.00 sec)
mysql> INSERT INTO `practical_q8`.`employee` (`emp_no`, `emp_name`, `hiredate`, `commission`, `netsalary`, `dept_no`, `designation`) VALUES ('4', 'emp_name_3', '2018-11-05', '110000', '145000', '10', 'Manager');
Query OK, 1 row affected (0.00 sec)
mysql> INSERT INTO `practical_q8`.`employee` (`emp_no`, `emp_name`, `hiredate`, `commission`, `netsalary`, `dept_no`, `designation`) VALUES ('2', 'emp_name_4', '2022-01-07', '50000', '48500', '30', 'Clerk');
Query OK, 1 row affected (0.00 sec)
mysql> INSERT INTO `practical_q8`.`employee` (`emp_no`, `emp_name`, `hiredate`, `commission`, `netsalary`, `dept_no`, `designation`) VALUES ('6', 'emp_name_5', '2016-10-01', '98450', '112000', '10', 'President');
Query OK, 1 row affected (0.00 sec)
mysql> INSERT INTO `practical_q8`.`employee` (`emp_no`, `emp_name`, `hiredate`, `commission`, `netsalary`, `dept_no`, `designation`) VALUES ('7', 'emp_name_6', '2020-10-15', '48000', '64000', '10', 'Clerk');
Query OK, 1 row affected (0.01 sec)
mysql> INSERT INTO `practical_q8`.`employee` (`emp_no`, `emp_name`, `hiredate`, `commission`, `netsalary`, `dept_no`, `designation`) VALUES ('10', 'emp_name_7', '2021-04-13', '1500', '20000', '30', 'Clerk');
Query OK, 1 row affected (0.00 sec)
mysql> INSERT INTO `practical_q8`.`employee` (`emp_no`, `emp_name`, `hiredate`, `commission`, `netsalary`, `dept_no`, `designation`) VALUES ('9', 'emp_name_8', '2020-04-10', '15500', '14300', '20', 'Manager');
Query OK, 1 row affected (0.01 sec)
mysql> select * from employee;
+--------+------------+------------+------------+-----------+---------+-------------+
| emp_no | emp_name | hiredate | commission | netsalary | dept_no | designation |
+--------+------------+------------+------------+-----------+---------+-------------+
| 1 | emp_name_1 | 2022-10-05 | 1200 | 11500 | 30 | Clerk |
| 2 | emp_name_4 | 2022-01-07 | 50000 | 48500 | 30 | Clerk |
| 3 | emp_name_2 | 2021-12-28 | 30000 | 32000 | 20 | Clerk |
| 4 | emp_name_3 | 2018-11-05 | 110000 | 145000 | 10 | Manager |
| 6 | emp_name_5 | 2016-10-01 | 98450 | 112000 | 10 | President |
| 7 | emp_name_6 | 2020-10-15 | 48000 | 64000 | 10 | Clerk |
| 9 | emp_name_8 | 2020-04-10 | 15500 | 14300 | 20 | Manager |
| 10 | emp_name_7 | 2021-04-13 | 1500 | 20000 | 30 | Clerk |
+--------+------------+------------+------------+-----------+---------+-------------+
8 rows in set (0.00 sec)
mysql> select employee.* from employee where dept_no='30';
+--------+------------+------------+------------+-----------+---------+-------------+
| emp_no | emp_name | hiredate | commission | netsalary | dept_no | designation |
+--------+------------+------------+------------+-----------+---------+-------------+
| 1 | emp_name_1 | 2022-10-05 | 1200 | 11500 | 30 | Clerk |
| 2 | emp_name_4 | 2022-01-07 | 50000 | 48500 | 30 | Clerk |
| 10 | emp_name_7 | 2021-04-13 | 1500 | 20000 | 30 | Clerk |
+--------+------------+------------+------------+-----------+---------+-------------+
3 rows in set (0.00 sec)
mysql> select employee.emp_name ,employee.emp_no ,empolyee.dept_no from employee where designation='Clerk';
ERROR 1054 (42S22): Unknown column 'empolyee.dept_no' in 'field list'
mysql> select employee.emp_name ,employee.emp_no ,employee.dept_no from employee where designation='Clerk';
+------------+--------+---------+
| emp_name | emp_no | dept_no |
+------------+--------+---------+
| emp_name_1 | 1 | 30 |
| emp_name_4 | 2 | 30 |
| emp_name_2 | 3 | 20 |
| emp_name_6 | 7 | 10 |
| emp_name_7 | 10 | 30 |
+------------+--------+---------+
5 rows in set (0.01 sec)
mysql> select employee.* where commission > netsalary;
ERROR 1051 (42S02): Unknown table 'employee'
mysql> select employee.* from employee where commission > netsalary;
+--------+------------+------------+------------+-----------+---------+-------------+
| emp_no | emp_name | hiredate | commission | netsalary | dept_no | designation |
+--------+------------+------------+------------+-----------+---------+-------------+
| 2 | emp_name_4 | 2022-01-07 | 50000 | 48500 | 30 | Clerk |
| 9 | emp_name_8 | 2020-04-10 | 15500 | 14300 | 20 | Manager |
+--------+------------+------------+------------+-----------+---------+-------------+
2 rows in set (0.00 sec)
mysql> select employee.* from employee where commission > 0.6*netsalary;
+--------+------------+------------+------------+-----------+---------+-------------+
| emp_no | emp_name | hiredate | commission | netsalary | dept_no | designation |
+--------+------------+------------+------------+-----------+---------+-------------+
| 2 | emp_name_4 | 2022-01-07 | 50000 | 48500 | 30 | Clerk |
| 3 | emp_name_2 | 2021-12-28 | 30000 | 32000 | 20 | Clerk |
| 4 | emp_name_3 | 2018-11-05 | 110000 | 145000 | 10 | Manager |
| 6 | emp_name_5 | 2016-10-01 | 98450 | 112000 | 10 | President |
| 7 | emp_name_6 | 2020-10-15 | 48000 | 64000 | 10 | Clerk |
| 9 | emp_name_8 | 2020-04-10 | 15500 | 14300 | 20 | Manager |
+--------+------------+------------+------------+-----------+---------+-------------+
6 rows in set (0.00 sec)
mysql> select emp^C
mysql> select employee.emp_name ,employee.designation , employee.netsalary from employee where dept_no='20' and netsalary >1500;
+------------+-------------+-----------+
| emp_name | designation | netsalary |
+------------+-------------+-----------+
| emp_name_2 | Clerk | 32000 |
| emp_name_8 | Manager | 14300 |
+------------+-------------+-----------+
2 rows in set (0.00 sec)
mysql> select employee.* from employee where department='30' and netsalary>1500 and designation='clerk';
ERROR 1054 (42S22): Unknown column 'department' in 'where clause'
mysql> select employee.* from employee where dept_no='30' and netsalary>1500 and designation='clerk';
+--------+------------+------------+------------+-----------+---------+-------------+
| emp_no | emp_name | hiredate | commission | netsalary | dept_no | designation |
+--------+------------+------------+------------+-----------+---------+-------------+
| 1 | emp_name_1 | 2022-10-05 | 1200 | 11500 | 30 | Clerk |
| 2 | emp_name_4 | 2022-01-07 | 50000 | 48500 | 30 | Clerk |
| 10 | emp_name_7 | 2021-04-13 | 1500 | 20000 | 30 | Clerk |
+--------+------------+------------+------------+-----------+---------+-------------+
3 rows in set (0.00 sec)
mysql> select employee.* from employee where designation='manager' or designation='president';
+--------+------------+------------+------------+-----------+---------+-------------+
| emp_no | emp_name | hiredate | commission | netsalary | dept_no | designation |
+--------+------------+------------+------------+-----------+---------+-------------+
| 4 | emp_name_3 | 2018-11-05 | 110000 | 145000 | 10 | Manager |
| 6 | emp_name_5 | 2016-10-01 | 98450 | 112000 | 10 | President |
| 9 | emp_name_8 | 2020-04-10 | 15500 | 14300 | 20 | Manager |
+--------+------------+------------+------------+-----------+---------+-------------+
3 rows in set (0.00 sec)
mysql> select employee.* from employee where designation='manager' and dept_no!=30;
+--------+------------+------------+------------+-----------+---------+-------------+
| emp_no | emp_name | hiredate | commission | netsalary | dept_no | designation |
+--------+------------+------------+------------+-----------+---------+-------------+
| 4 | emp_name_3 | 2018-11-05 | 110000 | 145000 | 10 | Manager |
| 9 | emp_name_8 | 2020-04-10 | 15500 | 14300 | 20 | Manager |
+--------+------------+------------+------------+-----------+---------+-------------+
2 rows in set (0.00 sec)
mysql> select employee.* from employee where designation='manager' and dept_no!=20;
+--------+------------+------------+------------+-----------+---------+-------------+
| emp_no | emp_name | hiredate | commission | netsalary | dept_no | designation |
+--------+------------+------------+------------+-----------+---------+-------------+
| 4 | emp_name_3 | 2018-11-05 | 110000 | 145000 | 10 | Manager |
+--------+------------+------------+------------+-----------+---------+-------------+
1 row in set (0.00 sec)
mysql> select employee.* from employee where dept_no=10 and designation='Clerk' and designation='Manager';
Empty set (0.00 sec)
mysql> SELECT * FROM employee WHERE dept_no=10 AND designation IN ("Clerk", "Manager");
+--------+------------+------------+------------+-----------+---------+-------------+
| emp_no | emp_name | hiredate | commission | netsalary | dept_no | designation |
+--------+------------+------------+------------+-----------+---------+-------------+
| 4 | emp_name_3 | 2018-11-05 | 110000 | 145000 | 10 | Manager |
| 7 | emp_name_6 | 2020-10-15 | 48000 | 64000 | 10 | Clerk |
+--------+------------+------------+------------+-----------+---------+-------------+
2 rows in set (0.00 sec)
mysql> select employee.* from employee where dept_no=10 and designation='Clerk' or dept_no=10 and designation='Manager';
+--------+------------+------------+------------+-----------+---------+-------------+
| emp_no | emp_name | hiredate | commission | netsalary | dept_no | designation |
+--------+------------+------------+------------+-----------+---------+-------------+
| 4 | emp_name_3 | 2018-11-05 | 110000 | 145000 | 10 | Manager |
| 7 | emp_name_6 | 2020-10-15 | 48000 | 64000 | 10 | Clerk |
+--------+------------+------------+------------+-----------+---------+-------------+
2 rows in set (0.00 sec)
mysql> select employee.* from employee where ( dept_no=10 and designation='Manager') or( dept_no=20 and designation='Clerk');
+--------+------------+------------+------------+-----------+---------+-------------+
| emp_no | emp_name | hiredate | commission | netsalary | dept_no | designation |
+--------+------------+------------+------------+-----------+---------+-------------+
| 3 | emp_name_2 | 2021-12-28 | 30000 | 32000 | 20 | Clerk |
| 4 | emp_name_3 | 2018-11-05 | 110000 | 145000 | 10 | Manager |
+--------+------------+------------+------------+-----------+---------+-------------+
2 rows in set (0.00 sec)
mysql>