我如何更改 mysql 中检索数据的方式结构
how can i change structure of the way i retrieve the data in mysql
我有这个数据集
Family
Members
type of service 1
Type of Service 2
Type of service 3
Family 1
Member 1
Cash
Education
Health
Family 1
Member 2
Education
work
cash
Family 2
Member 1
health
food
cash
我想要一个使输出像这样结构的查询：
family
Member
Type of service
Family 1
Member 1
Cash
Family 1
Member 1
Education
family 1
Member 1
health
Family 1
Member 2
Education
Family 1
Member 2
work
Family 1
Member 2
cash
我们可以使用联合方法：
SELECT Family, Members, Service1 AS Service FROM yourTable
UNION ALL
SELECT Family, Members, Service2 FROM yourTable
UNION ALL
SELECT Family, Members, Service3 FROM yourTable
ORDER BY Family, Members, Service;
我有这个数据集
| Family | Members | type of service 1 | Type of Service 2 | Type of service 3 |
|---|---|---|---|---|
| Family 1 | Member 1 | Cash | Education | Health |
| Family 1 | Member 2 | Education | work | cash |
| Family 2 | Member 1 | health | food | cash |
我想要一个使输出像这样结构的查询：
| family | Member | Type of service |
|---|---|---|
| Family 1 | Member 1 | Cash |
| Family 1 | Member 1 | Education |
| family 1 | Member 1 | health |
| Family 1 | Member 2 | Education |
| Family 1 | Member 2 | work |
| Family 1 | Member 2 | cash |
我们可以使用联合方法：
SELECT Family, Members, Service1 AS Service FROM yourTable
UNION ALL
SELECT Family, Members, Service2 FROM yourTable
UNION ALL
SELECT Family, Members, Service3 FROM yourTable
ORDER BY Family, Members, Service;