SELECT age, COUNT(*) FROM editor GROUP BY age
What are the different ages of editors? Show each age along with the number of editors of that age.
CREATE TABLE editor (
    editor_id number,
    name text,
    age number
)

CREATE TABLE journal_committee (
    editor_id number,
    journal_id number,
    work_type text
)

CREATE TABLE journal (
    journal_id number,
    date text,
    theme text,
    sales number
)