Function countDistinct

drizzle-orm/src/sql/functions/aggregate.ts:35–37

(expression: SQLWrapper)

 * @see count to get the number of values in `expression`, including duplicates
 */
export function countDistinct(expression: SQLWrapper): SQL<number> {
	return sql`count(distinct ${expression})`.mapWith(Number);
}

/**
 * Returns the average (arithmetic mean) of all non-null values in `expression`.