tnqian / test

Test

• 1. crete database simple_api
• 2. command -> node_modules/.bin/sequelize db:migrate (migrate data)

Continued from Question 2 & 3, you want to calculate the sum of commissions earned by the employees every month. Please

1. Expand existing DB models (new fields/tables) by providing an ERD.

2. Provide the necessary SQL statement to add necessary fields or tables to store employees’ commission.

3. Provide the necessary SQL statement that calculates the sum of commissions earned by the employees every month. If an employee doesn’t receive any commission, it should be calculated as zero. Your Solution

POST localhost:2043/get_employees body { keyword }

POST localhost:2043/save_employee body { "name" :"name", "email" :"email", "status": status }

employee [1 to many ] employee_commision

employee_commision

Column Type

id INT(11) PK employee_id INT(11) amount double created_at datetime

(SELECT e.employee_id, e.name, IFNULL(SUM(ec.amount * 1), 0) AS amount FROM simple_api.employees AS e LEFT JOIN simple_api.employee_commisions AS ec ON e.employee_id = ec.employee_id WHERE ec.created_at >= DATE_FORMAT(NOW(), '%Y-%m-01 00:00:00') AND ec.created_at <= DATE_FORMAT(NOW(), '%Y-%m-31 23:59:59')) UNION (SELECT e.employee_id, e.name, IFNULL(SUM(ec.amount * 1), 0) FROM simple_api.employees AS e LEFT JOIN simple_api.employee_commisions AS ec ON e.employee_id = ec.employee_id WHERE ec.employee_id IS NULL)