AFTER UPDATE trigger help

I am having problems creating an AFTER UPDATE trigger to display newly updated salaries from an employee table I have. I am not too sure of how to display the salaries that were updated in the trigger. The code I used to create the trigger is below:

CREATE TRIGGER incr_sal
AFTER UPDATE ON emp_table
FOR EACH ROW
DECLARE
v_sal emp_table.salary%TYPE;
BEGIN
SELECT salary
INTO v_sal
FROM emp_table
WHERE salary = :new.salary;
END incr_sal;

After creating the trigger, I tried to update emp_table by using:
DECLARE
v_increase
BEGIN
UPDATE emp_table
SET salary = salary + (salary * .05)
END;

But I keep getting errors:
Error at line 1:ORA-04091: table S305AD5.COLLINSK_TABLE is mutating, trigger/function may not see it

ORA-06512: at "S305AD5.INCR_SAL", line 4ORA-04088: error during execution of trigger 'S305AD5.INCR_SAL'

Could anyone please help? I am very confused

I just want to have my updates be displayed after O update them.

Your SELECT statement in the trigger is what is causing the problem. You can get around this using IF logic on the before and after values of the field: