Trying to get the result in single row using sql?

Question

I\'m trying to display all the employee id\'s

i need the result like

emp_id

10,11,12,13,14,15..,...

when tried

Answer 1

Use LISTAGG function. Refer here for more in detail. Try like this,

SELECT listagg(emp_id,',') WITHIN GROUP(ORDER BY emp_id) t 
FROM   employees;