5.2.1 SELECT

    select_expr [, select_expr ...]
    [FROM table_references
        [WHERE predicate_expr]
        [GROUP BY {col_name | expr}, ...]
        [HAVING predicate_expr]
        [ORDER BY {col_name | expr} [ASC | DESC], ...]
        [LIMIT {[offset,] row_count | row_count OFFSET offset}]]

GROUP BY and HAVING extensions

Like other databases, EventQL SQL extends the use of GROUP BY so that the select list can refer to nonaggregated columns not named in the GROUP BY clause. This assumes that the nongrouped columns will have the same group-wise values. Otherwise, the result is undefined. The same applies for the HAVING clause.

If you use a group function in a statement containing no GROUP BY clause, it will emit a single group.