Find Employees With Same Joining Date

Question

Find employees who joined on the same date.

Accepted Answer

```sql
SELECT joined_at, GROUP_CONCAT(name) AS employees
FROM employees
GROUP BY joined_at
HAVING COUNT(*) > 1;
```

This query groups the records in the "employees" table by the "joined_at" column and uses the `HAVING` clause to filter for dates associated with more than one employee, returning the list of names for each of those dates.