sql union

Guys, I'm fighting with this problem several hours. Can someone tell me why this query gives me 4 rows (as it should): SELECT SUM(18 * 4) AS price UNION SELECT SUM(7 * 4 * 2) AS price UNION SELECT SUM(6 * 4 * 2) AS price UNION SELECT SUM(15 * 0.445179 * 4) AS price And this query gives...

Guys, I'm fighting with this problem several hours. Can someone tell me why this query gives me 4 rows (as it should): SELECT SUM(18 * 4) AS price UNION SELECT SUM(7 * 4 * 2) AS price UNION SELECT SUM(6 * 4 * 2) AS price UNION SELECT SUM(15 * 0.445179 * 4) AS price And this query gives...