这个MYSQL查询在按组统计表项时是否更有效

我目前正在使用这个笨重的查询按时间组计算slow_日志中的条目:

SELECT count(query_time) `Result`  FROM `slow_log` WHERE `db` LIKE 'taco_query' and query_time > '00:59:00'
UNION
SELECT count(query_time) `Result`  FROM `slow_log` WHERE `db` LIKE 'taco_query' and query_time < '01:00:00' and query_time > '00:50:00'
UNION
SELECT count(query_time) `Result`  FROM `slow_log` WHERE `db` LIKE 'taco_query' and query_time < '00:50:00' and query_time > '00:40:00'
UNION
SELECT count(query_time) `Result`  FROM `slow_log` WHERE `db` LIKE 'taco_query' and query_time < '00:40:00' and query_time > '00:30:00'
UNION
SELECT count(query_time) `Result`  FROM `slow_log` WHERE `db` LIKE 'taco_query' and query_time < '00:30:00' and query_time > '00:20:00'
UNION
SELECT count(query_time) `Result`  FROM `slow_log` WHERE `db` LIKE 'taco_query' and query_time < '00:20:00' and query_time > '00:10:00'
UNION
SELECT count(query_time) `Result`  FROM `slow_log` WHERE `db` LIKE 'taco_query' and query_time < '00:10:00' and query_time > '00:5:00'
UNION
SELECT count(query_time) `Result`  FROM `slow_log` WHERE `db` LIKE 'taco_query' and query_time < '00:5:00' and query_time > '00:02:00'
UNION
SELECT count(query_time) `Result`  FROM `slow_log` WHERE `db` LIKE 'taco_query' and query_time < '00:02:00' and query_time > '00:01:00'
UNION
SELECT count(query_time) `Result`  FROM `slow_log` WHERE `db` LIKE 'taco_query' and query_time < '00:01:00' and query_time > '00:00:00'

有没有更好更有效的方法?