Total Hours Worked per Employee

Return each employee id and total hours worked (check_out minus check_in) rounded to 2 decimals, ordered by emp_id.

Table schema

Attendance(emp_id INT, check_in DATETIME, check_out DATETIME)

Sample data

emp_id | check_in | check_out
1 | 2026-09-01 09:00:00 | 2026-09-01 17:30:00
2 | 2026-09-01 09:20:00 | 2026-09-01 18:00:00
1 | 2026-09-02 09:05:00 | 2026-09-02 19:05:00
3 | 2026-09-02 08:55:00 | 2026-09-02 16:55:00