抱歉为标题混乱,我不确定用什么最好的方式来表达它。我有两个每日桌子,第一个看起来像这样:
| yyyy_mm_dd | x_id | feature | impl_status |
|------------|------|-------------|---------------|
| 2020-08-18 | 1 | Basic | first_contact |
| 2020-08-18 | 1 | Last Minute | first_contact |
| 2020-08-18 | 1 | Geo | first_contact |
| 2020-08-18 | 2 | Basic | implemented |
| 2020-08-18 | 2 | Last Minute | first_contact |
| 2020-08-18 | 2 | Geo | no_contact |
| 2020-08-18 | 3 | Basic | no_contact |
| 2020-08-18 | 3 | Last Minute | no_contact |
| 2020-08-18 | 3 | Geo | implemented |
第二个看起来像这样:
| yyyy_mm_dd | x_id | payment |
|------------|------|---------|
| 2020-08-18 | 1 | 0 |
| 2020-08-18 | 2 | 0 |
| 2020-08-18 | 3 | 1 |
| 2020-08-19 | 1 | 0 |
| 2020-08-19 | 2 | 0 |
| 2020-08-19 | 3 | 1 |
我想建立一个查询,其中第一个表中payment
变成feature
。由于first_contact
是布尔值(1/0),因此不会有payment
状态。这是我尝试过的:
select
yyyy_mm_dd,
t1.x_id
t1.impl_status
from
schema.table1 t1
left join(
select
yyyy_mm_dd,
x_id,
'payment' as feature,
if(payment=1, 'implemented', 'no_contact') as impl_status
from
schema.table2
) t2 on t2.yyyy_mm_dd = t1.yyyy_mm_dd and t2.x_id = t1.x_id
但是,由于含糊不清,我将需要选择t1.impl_status
或t2.impl_status
。两列未合并。
考虑到这一点,预期输出将如下所示:
| yyyy_mm_dd | x_id | feature | impl_status |
|------------|------|-------------|---------------|
| 2020-08-18 | 1 | Basic | first_contact |
| 2020-08-18 | 1 | Last Minute | first_contact |
| 2020-08-18 | 1 | Geo | first_contact |
| 2020-08-18 | 1 | Payment | no_contact |
| 2020-08-18 | 2 | Basic | implemented |
| 2020-08-18 | 2 | Last Minute | first_contact |
| 2020-08-18 | 2 | Geo | no_contact |
| 2020-08-18 | 2 | Payment | no_contact |
| 2020-08-18 | 3 | Basic | no_contact |
| 2020-08-18 | 3 | Last Minute | no_contact |
| 2020-08-18 | 3 | Geo | implemented |
| 2020-08-18 | 3 | Payment | implemented |
| 2020-08-19 ...
...
答案 0 :(得分:1)
您可以使用union all
:
select yyyy_mm_dd, x_id, feature, impl_status from table1 t1
union all
select yyyy_mm_dd, x_id, 'Payment', case when payment = 0 then 'no_contact' else 'implemented' end from table2