28. Departments Above Average Headcount
MediumAdvanced Filteringaggregate of aggregatessubquery in WHERE
To compare a group's size against the average group size, you aggregate once to get per-group counts, then aggregate again over those counts.
Task: return the departments whose headcount is strictly greater than the
average headcount across all departments. Columns: dept, cnt. Order by
cnt descending, then dept.
Tables
Loading schema…
Expected outputrows must come back in this order
Computing expected output…
This is the result for the example data above. On Submit your query is graded against this example plus 4 hidden edge cases — 5test cases in all. A sloppy query that only fits the example won't pass.
SQL· SQLite · runs in your browser
⌘/Ctrl+↵ run · ⇧⌘/Ctrl+↵ submit
Run a query to see its output here.