如何从表中获取所有数据，如果在同一列中重复相同的值，则该行应计数一次？

Question

leave_request table in my table emp_id column contains duplicate data 3 times. i want to select all the data from the table and the duplicate data to count as once. here i am providing the screenshot of my table structure

Answer 1

You can try below -

select max(id),emp_id, emp_name
from tablename
group by emp_id, emp_name