<分区>
输入
+------------+----------+-----------+-------+-------------+
| cardNo | userName | tablename | hours | date |
+------------+----------+-----------+-------+-------------+
| 1 | a | a | 12 | 12-06-2015 |
| 1 | a | a | 5 | 11-06-2015 |
| 2 | b | b | 3 | 15-06-2015 |
| 1 | a | a | 8 | 12-06-2015 |
| 2 | b | b | 3 | 21-06-2015 |
| 1 | a | a | 12 | 14-06-2015 |
| 2 | b | b | 10 | 8-06-2015 |
+------------+----------+-----------+-------+-------------+
cardNo 是唯一的。我需要显示每张卡片的所有详细信息和总小时数，例如:
期望的输出
+--------+----------+-----------+-------------+
| cardNo | userName | tablename | totalhours |
+--------+----------+-----------+-------------+
| 1 | a | a | 37 |
| 2 | b | b | 16 |
+--------+----------+-----------+-------------+
我的查询
SELECT cardNo,sum(hours)
FROM yourtable
GROUP BY cardNo;
但我需要 totalHours >=20 是 'N'。
SELECT cardNo,sum(hours)
FROM yourtable where totalHours>=20
GROUP BY cardNo;
我无法得到正确答案。如果我指定 totalHours>=1 它会给出正确答案；我能做些什么？而且我还需要用于该查询的 PHP 获取代码。