Expression inside selected column name

Question

Problem: I want to get an average salary of all employees. The query itself is rather simple:

Question: Is it possible to move COUNT(salary) to selected column's title (after AS statement), so the name of the column will be "Average salary of 20 employees"? I've been trying several approaches, but none of them worked. I would really appreciate any help. Thank you in advance.

Answer 1

Screenshot you posted looks like Apex SQL Workshop. I don't know how to do it there, but - if you used SQL*Plus, then you could do something like this (not exactly as you wanted it, though):

SQL> set ver off
SQL> column cnt_emps new_value l_cnt
SQL> select count(*) cnt_emps from emp;

  CNT_EMPS
----------
        14

SQL> select avg(sal) as "Average salary of &l_cnt employees" from emp;

Average salary of         14 employees
--------------------------------------
                            2073.21429

SQL>

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However, if you're already using Apex, switch to GUI and create a page which will let you format the result any way you want (using colors, large font, bold letters, whatever). SQL*Plus and its descendants are kind of restrictive when such things should be done.