Sql/Mysql
从测试中选择*;
fare_str = varchar(100) 数据类型。
+-----------------+-------------+-------------+
| fare_str | operator_id | bus_type_id |
+-----------------+-------------+-------------+
| 550,600,555 | 7 | 62 |
| 650,660 | 2 | 77 |
| 449,449,449,449 | 4 | 77 |
| 333 | 21 | 75 |
| 650 | 7 | 50 |
| 500 | 2 | 97 |
+-----------------+-------------+-------------+
所需的输出: 这里我如何通过sql查询获取特定原始和列fare_str的最小值;
+-----------------+-------------+-------------+
| fare_str | operator_id | bus_type_id |
+-----------------+-------------+-------------+
| 550 | 7 | 62 |
| 650 | 2 | 77 |
| 449 | 4 | 77 |
| 333 | 21 | 75 |
| 650 | 7 | 50 |
| 500 | 2 | 97 |
+-----------------+-------------+-------------+
最佳答案
试试这个
SELECT MIN(SUBSTRING_INDEX(SUBSTRING_INDEX(t.fare_str, ',', n.n), ',', -1)) value,operator_id, bus_type_id
FROM Table1 t CROSS JOIN
(
SELECT a.N + b.N * 10 + 1 n
FROM
(SELECT 0 AS N UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9) a
,(SELECT 0 AS N UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9) b
ORDER BY n
) n
WHERE n.n <= 1 + (LENGTH(t.fare_str) - LENGTH(REPLACE(t.fare_str, ',', '')))
Group By operator_id, bus_type_id
关于mysql - 如何在SQL中获取特定记录列的最小值?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/24406621/