跨多个分区填写缺失日期（Snowflake）
Fill in missing dates across multiple partitions (Snowflake)
我有大量 table（在 Snowflake 中）多个实体在多个时间段内以多种货币表示的金额。但是，缺少数量为 0 的实例，需要添加 - 从第一个日期到当前日期。数据示例如下所示：
Name
Currency
Date
Amount
A
USD
2020-01-01
3
A
USD
2020-01-03
4
A
USD
2020-01-04
2
A
CAD
2021-01-04
5
A
CAD
2021-01-06
6
A
CAD
2020-01-07
1
B
USD
2019-01-01
3
B
USD
2019-01-03
4
B
USD
2019-01-04
5
B
CAD
2017-01-04
3
B
CAD
2017-01-06
2
B
CAD
2017-01-07
2
我见过的大多数通过生成 table 日期并加入的解决方案的问题是：
- 他们只会填写一次日期，而不是填写所有 partitions/pairs（A 和美元、A 和加元、B 和美元、B 和加元）的日期
- 他们使用预先生成的 table 中的固定开始日期，而最早日期因考虑的名称和货币对而异
Oracle DB 支持类似分区外连接的功能，这至少能让我达到一定程度。但是雪花没有这个能力。
我不太关心效率。
WITH fake_data AS (
SELECT * FROM VALUES
('A','USD','2020-01-01'::date,3)
,('A','USD','2020-01-03'::date,4)
,('A','USD','2020-01-04'::date,2)
,('A','CAD','2021-01-04'::date,5)
,('A','CAD','2021-01-06'::date,6)
,('A','CAD','2020-01-07'::date,1)
,('B','USD','2019-01-01'::date,3)
,('B','USD','2019-01-03'::date,4)
,('B','USD','2019-01-04'::date,5)
,('B','CAD','2017-01-04'::date,3)
,('B','CAD','2017-01-06'::date,2)
,('B','CAD','2017-01-07'::date,2)
d(Name,Currency,Date,Amount)
), partition_ranges AS (
SELECT name,
currency,
min(date) as min_date,
max(date) as max_date,
datediff('days', min_date, max_date) as span
FROM fake_data
GROUP BY 1,2
), huge_range as (
SELECT ROW_NUMBER() OVER(order by true)-1 as rn
FROM table(generator(ROWCOUNT => 10000000))
), in_fill as (
SELECT pr.name,
pr.currency,
dateadd('day', hr.rn, pr.min_date) as date
FROM partition_ranges as pr
JOIN huge_range as hr ON pr.span >= hr.rn
)
SELECT
i.name,
i.currency,
i.date,
nvl(d.amount, 0) as amount
from in_fill as i
left join fake_data as d on d.name = i.name and d.currency = i.currency and d.date = i.date
order by 1,2,3;
NAME
CURRENCY
DATE
AMOUNT
A
CAD
2020-01-07
1
A
CAD
2020-01-08
0
A
CAD
2020-01-09
0
A
CAD
2020-01-10
0
A
CAD
2020-01-11
0
A
CAD
2020-01-12
0
A
CAD
2020-01-13
0
A
CAD
2020-01-14
0
A
CAD
2020-01-15
0
A
CAD
2020-01-16
0
A
CAD
2020-01-17
0
A
CAD
2020-01-18
0
A
CAD
2020-01-19
0
A
CAD
2020-01-20
0
A
CAD
2020-01-21
0
A
CAD
2020-01-22
0
A
CAD
2020-01-23
0
A
CAD
2020-01-24
0
A
CAD
2020-01-25
0
A
CAD
2020-01-26
0
A
CAD
2020-01-27
0
A
CAD
2020-01-28
0
A
CAD
2020-01-29
0
A
CAD
2020-01-30
0
A
CAD
2020-01-31
0
A
CAD
2020-02-01
0
A
CAD
2020-02-02
0
A
CAD
2020-02-03
0
A
CAD
2020-02-04
0
A
CAD
2020-02-05
0
A
CAD
2020-02-06
0
A
CAD
2020-02-07
0
A
CAD
2020-02-08
0
A
CAD
2020-02-09
0
A
CAD
2020-02-10
0
A
CAD
2020-02-11
0
A
CAD
2020-02-12
0
A
CAD
2020-02-13
0
A
CAD
2020-02-14
0
A
CAD
2020-02-15
0
A
CAD
2020-02-16
0
A
CAD
2020-02-17
0
A
CAD
2020-02-18
0
A
CAD
2020-02-19
0
A
CAD
2020-02-20
0
A
CAD
2020-02-21
0
A
CAD
2020-02-22
0
A
CAD
2020-02-23
0
A
CAD
2020-02-24
0
A
CAD
2020-02-25
0
A
CAD
2020-02-26
0
A
CAD
2020-02-27
0
A
CAD
2020-02-28
0
A
CAD
2020-02-29
0
A
CAD
2020-03-01
0
A
CAD
2020-03-02
0
A
CAD
2020-03-03
0
A
CAD
2020-03-04
0
A
CAD
2020-03-05
0
A
CAD
2020-03-06
0
A
CAD
2020-03-07
0
A
CAD
2020-03-08
0
A
CAD
2020-03-09
0
A
CAD
2020-03-10
0
A
CAD
2020-03-11
0
A
CAD
2020-03-12
0
A
CAD
2020-03-13
0
A
CAD
2020-03-14
0
A
CAD
2020-03-15
0
A
CAD
2020-03-16
0
A
CAD
2020-03-17
0
A
CAD
2020-03-18
0
A
CAD
2020-03-19
0
A
CAD
2020-03-20
0
A
CAD
2020-03-21
0
A
CAD
2020-03-22
0
A
CAD
2020-03-23
0
A
CAD
2020-03-24
0
A
CAD
2020-03-25
0
A
CAD
2020-03-26
0
A
CAD
2020-03-27
0
A
CAD
2020-03-28
0
A
CAD
2020-03-29
0
A
CAD
2020-03-30
0
A
CAD
2020-03-31
0
A
CAD
2020-04-01
0
A
CAD
2020-04-02
0
A
CAD
2020-04-03
0
A
CAD
2020-04-04
0
A
CAD
2020-04-05
0
A
CAD
2020-04-06
0
A
CAD
2020-04-07
0
A
CAD
2020-04-08
0
A
CAD
2020-04-09
0
A
CAD
2020-04-10
0
A
CAD
2020-04-11
0
A
CAD
2020-04-12
0
A
CAD
2020-04-13
0
A
CAD
2020-04-14
0
A
CAD
2020-04-15
0
A
CAD
2020-04-16
0
A
CAD
2020-04-17
0
A
CAD
2020-04-18
0
A
CAD
2020-04-19
0
A
CAD
2020-04-20
0
A
CAD
2020-04-21
0
A
CAD
2020-04-22
0
A
CAD
2020-04-23
0
A
CAD
2020-04-24
0
A
CAD
2020-04-25
0
A
CAD
2020-04-26
0
A
CAD
2020-04-27
0
A
CAD
2020-04-28
0
A
CAD
2020-04-29
0
A
CAD
2020-04-30
0
A
CAD
2020-05-01
0
A
CAD
2020-05-02
0
A
CAD
2020-05-03
0
A
CAD
2020-05-04
0
A
CAD
2020-05-05
0
A
CAD
2020-05-06
0
A
CAD
2020-05-07
0
A
CAD
2020-05-08
0
A
CAD
2020-05-09
0
A
CAD
2020-05-10
0
A
CAD
2020-05-11
0
A
CAD
2020-05-12
0
A
CAD
2020-05-13
0
A
CAD
2020-05-14
0
A
CAD
2020-05-15
0
A
CAD
2020-05-16
0
A
CAD
2020-05-17
0
A
CAD
2020-05-18
0
A
CAD
2020-05-19
0
A
CAD
2020-05-20
0
A
CAD
2020-05-21
0
A
CAD
2020-05-22
0
A
CAD
2020-05-23
0
A
CAD
2020-05-24
0
A
CAD
2020-05-25
0
A
CAD
2020-05-26
0
A
CAD
2020-05-27
0
A
CAD
2020-05-28
0
A
CAD
2020-05-29
0
A
CAD
2020-05-30
0
A
CAD
2020-05-31
0
A
CAD
2020-06-01
0
A
CAD
2020-06-02
0
A
CAD
2020-06-03
0
A
CAD
2020-06-04
0
A
CAD
2020-06-05
0
A
CAD
2020-06-06
0
A
CAD
2020-06-07
0
A
CAD
2020-06-08
0
A
CAD
2020-06-09
0
A
CAD
2020-06-10
0
A
CAD
2020-06-11
0
A
CAD
2020-06-12
0
A
CAD
2020-06-13
0
A
CAD
2020-06-14
0
A
CAD
2020-06-15
0
A
CAD
2020-06-16
0
A
CAD
2020-06-17
0
A
CAD
2020-06-18
0
A
CAD
2020-06-19
0
A
CAD
2020-06-20
0
A
CAD
2020-06-21
0
A
CAD
2020-06-22
0
A
CAD
2020-06-23
0
A
CAD
2020-06-24
0
A
CAD
2020-06-25
0
A
CAD
2020-06-26
0
A
CAD
2020-06-27
0
A
CAD
2020-06-28
0
A
CAD
2020-06-29
0
A
CAD
2020-06-30
0
A
CAD
2020-07-01
0
A
CAD
2020-07-02
0
A
CAD
2020-07-03
0
A
CAD
2020-07-04
0
A
CAD
2020-07-05
0
A
CAD
2020-07-06
0
A
CAD
2020-07-07
0
A
CAD
2020-07-08
0
A
CAD
2020-07-09
0
A
CAD
2020-07-10
0
A
CAD
2020-07-11
0
A
CAD
2020-07-12
0
A
CAD
2020-07-13
0
A
CAD
2020-07-14
0
A
CAD
2020-07-15
0
A
CAD
2020-07-16
0
A
CAD
2020-07-17
0
A
CAD
2020-07-18
0
A
CAD
2020-07-19
0
A
CAD
2020-07-20
0
A
CAD
2020-07-21
0
A
CAD
2020-07-22
0
A
CAD
2020-07-23
0
A
CAD
2020-07-24
0
A
CAD
2020-07-25
0
A
CAD
2020-07-26
0
A
CAD
2020-07-27
0
A
CAD
2020-07-28
0
A
CAD
2020-07-29
0
A
CAD
2020-07-30
0
A
CAD
2020-07-31
0
A
CAD
2020-08-01
0
A
CAD
2020-08-02
0
A
CAD
2020-08-03
0
A
CAD
2020-08-04
0
A
CAD
2020-08-05
0
A
CAD
2020-08-06
0
A
CAD
2020-08-07
0
A
CAD
2020-08-08
0
A
CAD
2020-08-09
0
A
CAD
2020-08-10
0
A
CAD
2020-08-11
0
A
CAD
2020-08-12
0
A
CAD
2020-08-13
0
A
CAD
2020-08-14
0
A
CAD
2020-08-15
0
A
CAD
2020-08-16
0
A
CAD
2020-08-17
0
A
CAD
2020-08-18
0
A
CAD
2020-08-19
0
A
CAD
2020-08-20
0
A
CAD
2020-08-21
0
A
CAD
2020-08-22
0
A
CAD
2020-08-23
0
A
CAD
2020-08-24
0
A
CAD
2020-08-25
0
A
CAD
2020-08-26
0
A
CAD
2020-08-27
0
A
CAD
2020-08-28
0
A
CAD
2020-08-29
0
A
CAD
2020-08-30
0
A
CAD
2020-08-31
0
A
CAD
2020-09-01
0
A
CAD
2020-09-02
0
A
CAD
2020-09-03
0
A
CAD
2020-09-04
0
A
CAD
2020-09-05
0
A
CAD
2020-09-06
0
A
CAD
2020-09-07
0
A
CAD
2020-09-08
0
A
CAD
2020-09-09
0
A
CAD
2020-09-10
0
A
CAD
2020-09-11
0
A
CAD
2020-09-12
0
A
CAD
2020-09-13
0
A
CAD
2020-09-14
0
A
CAD
2020-09-15
0
A
CAD
2020-09-16
0
A
CAD
2020-09-17
0
A
CAD
2020-09-18
0
A
CAD
2020-09-19
0
A
CAD
2020-09-20
0
A
CAD
2020-09-21
0
A
CAD
2020-09-22
0
A
CAD
2020-09-23
0
A
CAD
2020-09-24
0
A
CAD
2020-09-25
0
A
CAD
2020-09-26
0
A
CAD
2020-09-27
0
A
CAD
2020-09-28
0
A
CAD
2020-09-29
0
A
CAD
2020-09-30
0
A
CAD
2020-10-01
0
A
CAD
2020-10-02
0
A
CAD
2020-10-03
0
A
CAD
2020-10-04
0
A
CAD
2020-10-05
0
A
CAD
2020-10-06
0
A
CAD
2020-10-07
0
A
CAD
2020-10-08
0
A
CAD
2020-10-09
0
A
CAD
2020-10-10
0
A
CAD
2020-10-11
0
A
CAD
2020-10-12
0
A
CAD
2020-10-13
0
A
CAD
2020-10-14
0
A
CAD
2020-10-15
0
A
CAD
2020-10-16
0
A
CAD
2020-10-17
0
A
CAD
2020-10-18
0
A
CAD
2020-10-19
0
A
CAD
2020-10-20
0
A
CAD
2020-10-21
0
A
CAD
2020-10-22
0
A
CAD
2020-10-23
0
A
CAD
2020-10-24
0
A
CAD
2020-10-25
0
A
CAD
2020-10-26
0
A
CAD
2020-10-27
0
A
CAD
2020-10-28
0
A
CAD
2020-10-29
0
A
CAD
2020-10-30
0
A
CAD
2020-10-31
0
A
CAD
2020-11-01
0
A
CAD
2020-11-02
0
A
CAD
2020-11-03
0
A
CAD
2020-11-04
0
A
CAD
2020-11-05
0
A
CAD
2020-11-06
0
A
CAD
2020-11-07
0
A
CAD
2020-11-08
0
A
CAD
2020-11-09
0
A
CAD
2020-11-10
0
A
CAD
2020-11-11
0
A
CAD
2020-11-12
0
A
CAD
2020-11-13
0
A
CAD
2020-11-14
0
A
CAD
2020-11-15
0
A
CAD
2020-11-16
0
A
CAD
2020-11-17
0
A
CAD
2020-11-18
0
A
CAD
2020-11-19
0
A
CAD
2020-11-20
0
A
CAD
2020-11-21
0
A
CAD
2020-11-22
0
A
CAD
2020-11-23
0
A
CAD
2020-11-24
0
A
CAD
2020-11-25
0
A
CAD
2020-11-26
0
A
CAD
2020-11-27
0
A
CAD
2020-11-28
0
A
CAD
2020-11-29
0
A
CAD
2020-11-30
0
A
CAD
2020-12-01
0
A
CAD
2020-12-02
0
A
CAD
2020-12-03
0
A
CAD
2020-12-04
0
A
CAD
2020-12-05
0
A
CAD
2020-12-06
0
A
CAD
2020-12-07
0
A
CAD
2020-12-08
0
A
CAD
2020-12-09
0
A
CAD
2020-12-10
0
A
CAD
2020-12-11
0
A
CAD
2020-12-12
0
A
CAD
2020-12-13
0
A
CAD
2020-12-14
0
A
CAD
2020-12-15
0
A
CAD
2020-12-16
0
A
CAD
2020-12-17
0
A
CAD
2020-12-18
0
A
CAD
2020-12-19
0
A
CAD
2020-12-20
0
A
CAD
2020-12-21
0
A
CAD
2020-12-22
0
A
CAD
2020-12-23
0
A
CAD
2020-12-24
0
A
CAD
2020-12-25
0
A
CAD
2020-12-26
0
A
CAD
2020-12-27
0
A
CAD
2020-12-28
0
A
CAD
2020-12-29
0
A
CAD
2020-12-30
0
A
CAD
2020-12-31
0
A
CAD
2021-01-01
0
A
CAD
2021-01-02
0
A
CAD
2021-01-03
0
A
CAD
2021-01-04
5
A
CAD
2021-01-05
0
A
CAD
2021-01-06
6
A
USD
2020-01-01
3
A
USD
2020-01-02
0
A
USD
2020-01-03
4
A
USD
2020-01-04
2
B
CAD
2017-01-04
3
B
CAD
2017-01-05
0
B
CAD
2017-01-06
2
B
CAD
2017-01-07
2
B
USD
2019-01-01
3
B
USD
2019-01-02
0
B
USD
2019-01-03
4
B
USD
2019-01-04
5
使用 Simeon 的假数据，想到了使用 repeat 和 split_to_table 的替代方案。这个想法是为每个名称和货币创建我们需要的确切数量的组合，然后使用基于集合的逻辑来创建最终输出
with lookup (name, currency, min_date, day_count) as
(select name,currency, min(date), datediff(day,min(date),max(date))
from fake_data
group by name, currency)
select name, currency, date, amount --start with what you already have
from fake_data
union all
select name, currency, dateadd('day',b.index-1,min_date), 0 -- add in all the combinations
from lookup, lateral split_to_table(repeat('.',day_count), '.') b
minus
select name, currency, date, 0 --remove the combinations you already have the amounts for
from fake_data
order by name, currency, date
我有大量 table（在 Snowflake 中）多个实体在多个时间段内以多种货币表示的金额。但是，缺少数量为 0 的实例，需要添加 - 从第一个日期到当前日期。数据示例如下所示：
| Name | Currency | Date | Amount |
|---|---|---|---|
| A | USD | 2020-01-01 | 3 |
| A | USD | 2020-01-03 | 4 |
| A | USD | 2020-01-04 | 2 |
| A | CAD | 2021-01-04 | 5 |
| A | CAD | 2021-01-06 | 6 |
| A | CAD | 2020-01-07 | 1 |
| B | USD | 2019-01-01 | 3 |
| B | USD | 2019-01-03 | 4 |
| B | USD | 2019-01-04 | 5 |
| B | CAD | 2017-01-04 | 3 |
| B | CAD | 2017-01-06 | 2 |
| B | CAD | 2017-01-07 | 2 |
我见过的大多数通过生成 table 日期并加入的解决方案的问题是：
- 他们只会填写一次日期，而不是填写所有 partitions/pairs（A 和美元、A 和加元、B 和美元、B 和加元）的日期
- 他们使用预先生成的 table 中的固定开始日期，而最早日期因考虑的名称和货币对而异
Oracle DB 支持类似分区外连接的功能，这至少能让我达到一定程度。但是雪花没有这个能力。
我不太关心效率。
WITH fake_data AS (
SELECT * FROM VALUES
('A','USD','2020-01-01'::date,3)
,('A','USD','2020-01-03'::date,4)
,('A','USD','2020-01-04'::date,2)
,('A','CAD','2021-01-04'::date,5)
,('A','CAD','2021-01-06'::date,6)
,('A','CAD','2020-01-07'::date,1)
,('B','USD','2019-01-01'::date,3)
,('B','USD','2019-01-03'::date,4)
,('B','USD','2019-01-04'::date,5)
,('B','CAD','2017-01-04'::date,3)
,('B','CAD','2017-01-06'::date,2)
,('B','CAD','2017-01-07'::date,2)
d(Name,Currency,Date,Amount)
), partition_ranges AS (
SELECT name,
currency,
min(date) as min_date,
max(date) as max_date,
datediff('days', min_date, max_date) as span
FROM fake_data
GROUP BY 1,2
), huge_range as (
SELECT ROW_NUMBER() OVER(order by true)-1 as rn
FROM table(generator(ROWCOUNT => 10000000))
), in_fill as (
SELECT pr.name,
pr.currency,
dateadd('day', hr.rn, pr.min_date) as date
FROM partition_ranges as pr
JOIN huge_range as hr ON pr.span >= hr.rn
)
SELECT
i.name,
i.currency,
i.date,
nvl(d.amount, 0) as amount
from in_fill as i
left join fake_data as d on d.name = i.name and d.currency = i.currency and d.date = i.date
order by 1,2,3;
| NAME | CURRENCY | DATE | AMOUNT |
|---|---|---|---|
| A | CAD | 2020-01-07 | 1 |
| A | CAD | 2020-01-08 | 0 |
| A | CAD | 2020-01-09 | 0 |
| A | CAD | 2020-01-10 | 0 |
| A | CAD | 2020-01-11 | 0 |
| A | CAD | 2020-01-12 | 0 |
| A | CAD | 2020-01-13 | 0 |
| A | CAD | 2020-01-14 | 0 |
| A | CAD | 2020-01-15 | 0 |
| A | CAD | 2020-01-16 | 0 |
| A | CAD | 2020-01-17 | 0 |
| A | CAD | 2020-01-18 | 0 |
| A | CAD | 2020-01-19 | 0 |
| A | CAD | 2020-01-20 | 0 |
| A | CAD | 2020-01-21 | 0 |
| A | CAD | 2020-01-22 | 0 |
| A | CAD | 2020-01-23 | 0 |
| A | CAD | 2020-01-24 | 0 |
| A | CAD | 2020-01-25 | 0 |
| A | CAD | 2020-01-26 | 0 |
| A | CAD | 2020-01-27 | 0 |
| A | CAD | 2020-01-28 | 0 |
| A | CAD | 2020-01-29 | 0 |
| A | CAD | 2020-01-30 | 0 |
| A | CAD | 2020-01-31 | 0 |
| A | CAD | 2020-02-01 | 0 |
| A | CAD | 2020-02-02 | 0 |
| A | CAD | 2020-02-03 | 0 |
| A | CAD | 2020-02-04 | 0 |
| A | CAD | 2020-02-05 | 0 |
| A | CAD | 2020-02-06 | 0 |
| A | CAD | 2020-02-07 | 0 |
| A | CAD | 2020-02-08 | 0 |
| A | CAD | 2020-02-09 | 0 |
| A | CAD | 2020-02-10 | 0 |
| A | CAD | 2020-02-11 | 0 |
| A | CAD | 2020-02-12 | 0 |
| A | CAD | 2020-02-13 | 0 |
| A | CAD | 2020-02-14 | 0 |
| A | CAD | 2020-02-15 | 0 |
| A | CAD | 2020-02-16 | 0 |
| A | CAD | 2020-02-17 | 0 |
| A | CAD | 2020-02-18 | 0 |
| A | CAD | 2020-02-19 | 0 |
| A | CAD | 2020-02-20 | 0 |
| A | CAD | 2020-02-21 | 0 |
| A | CAD | 2020-02-22 | 0 |
| A | CAD | 2020-02-23 | 0 |
| A | CAD | 2020-02-24 | 0 |
| A | CAD | 2020-02-25 | 0 |
| A | CAD | 2020-02-26 | 0 |
| A | CAD | 2020-02-27 | 0 |
| A | CAD | 2020-02-28 | 0 |
| A | CAD | 2020-02-29 | 0 |
| A | CAD | 2020-03-01 | 0 |
| A | CAD | 2020-03-02 | 0 |
| A | CAD | 2020-03-03 | 0 |
| A | CAD | 2020-03-04 | 0 |
| A | CAD | 2020-03-05 | 0 |
| A | CAD | 2020-03-06 | 0 |
| A | CAD | 2020-03-07 | 0 |
| A | CAD | 2020-03-08 | 0 |
| A | CAD | 2020-03-09 | 0 |
| A | CAD | 2020-03-10 | 0 |
| A | CAD | 2020-03-11 | 0 |
| A | CAD | 2020-03-12 | 0 |
| A | CAD | 2020-03-13 | 0 |
| A | CAD | 2020-03-14 | 0 |
| A | CAD | 2020-03-15 | 0 |
| A | CAD | 2020-03-16 | 0 |
| A | CAD | 2020-03-17 | 0 |
| A | CAD | 2020-03-18 | 0 |
| A | CAD | 2020-03-19 | 0 |
| A | CAD | 2020-03-20 | 0 |
| A | CAD | 2020-03-21 | 0 |
| A | CAD | 2020-03-22 | 0 |
| A | CAD | 2020-03-23 | 0 |
| A | CAD | 2020-03-24 | 0 |
| A | CAD | 2020-03-25 | 0 |
| A | CAD | 2020-03-26 | 0 |
| A | CAD | 2020-03-27 | 0 |
| A | CAD | 2020-03-28 | 0 |
| A | CAD | 2020-03-29 | 0 |
| A | CAD | 2020-03-30 | 0 |
| A | CAD | 2020-03-31 | 0 |
| A | CAD | 2020-04-01 | 0 |
| A | CAD | 2020-04-02 | 0 |
| A | CAD | 2020-04-03 | 0 |
| A | CAD | 2020-04-04 | 0 |
| A | CAD | 2020-04-05 | 0 |
| A | CAD | 2020-04-06 | 0 |
| A | CAD | 2020-04-07 | 0 |
| A | CAD | 2020-04-08 | 0 |
| A | CAD | 2020-04-09 | 0 |
| A | CAD | 2020-04-10 | 0 |
| A | CAD | 2020-04-11 | 0 |
| A | CAD | 2020-04-12 | 0 |
| A | CAD | 2020-04-13 | 0 |
| A | CAD | 2020-04-14 | 0 |
| A | CAD | 2020-04-15 | 0 |
| A | CAD | 2020-04-16 | 0 |
| A | CAD | 2020-04-17 | 0 |
| A | CAD | 2020-04-18 | 0 |
| A | CAD | 2020-04-19 | 0 |
| A | CAD | 2020-04-20 | 0 |
| A | CAD | 2020-04-21 | 0 |
| A | CAD | 2020-04-22 | 0 |
| A | CAD | 2020-04-23 | 0 |
| A | CAD | 2020-04-24 | 0 |
| A | CAD | 2020-04-25 | 0 |
| A | CAD | 2020-04-26 | 0 |
| A | CAD | 2020-04-27 | 0 |
| A | CAD | 2020-04-28 | 0 |
| A | CAD | 2020-04-29 | 0 |
| A | CAD | 2020-04-30 | 0 |
| A | CAD | 2020-05-01 | 0 |
| A | CAD | 2020-05-02 | 0 |
| A | CAD | 2020-05-03 | 0 |
| A | CAD | 2020-05-04 | 0 |
| A | CAD | 2020-05-05 | 0 |
| A | CAD | 2020-05-06 | 0 |
| A | CAD | 2020-05-07 | 0 |
| A | CAD | 2020-05-08 | 0 |
| A | CAD | 2020-05-09 | 0 |
| A | CAD | 2020-05-10 | 0 |
| A | CAD | 2020-05-11 | 0 |
| A | CAD | 2020-05-12 | 0 |
| A | CAD | 2020-05-13 | 0 |
| A | CAD | 2020-05-14 | 0 |
| A | CAD | 2020-05-15 | 0 |
| A | CAD | 2020-05-16 | 0 |
| A | CAD | 2020-05-17 | 0 |
| A | CAD | 2020-05-18 | 0 |
| A | CAD | 2020-05-19 | 0 |
| A | CAD | 2020-05-20 | 0 |
| A | CAD | 2020-05-21 | 0 |
| A | CAD | 2020-05-22 | 0 |
| A | CAD | 2020-05-23 | 0 |
| A | CAD | 2020-05-24 | 0 |
| A | CAD | 2020-05-25 | 0 |
| A | CAD | 2020-05-26 | 0 |
| A | CAD | 2020-05-27 | 0 |
| A | CAD | 2020-05-28 | 0 |
| A | CAD | 2020-05-29 | 0 |
| A | CAD | 2020-05-30 | 0 |
| A | CAD | 2020-05-31 | 0 |
| A | CAD | 2020-06-01 | 0 |
| A | CAD | 2020-06-02 | 0 |
| A | CAD | 2020-06-03 | 0 |
| A | CAD | 2020-06-04 | 0 |
| A | CAD | 2020-06-05 | 0 |
| A | CAD | 2020-06-06 | 0 |
| A | CAD | 2020-06-07 | 0 |
| A | CAD | 2020-06-08 | 0 |
| A | CAD | 2020-06-09 | 0 |
| A | CAD | 2020-06-10 | 0 |
| A | CAD | 2020-06-11 | 0 |
| A | CAD | 2020-06-12 | 0 |
| A | CAD | 2020-06-13 | 0 |
| A | CAD | 2020-06-14 | 0 |
| A | CAD | 2020-06-15 | 0 |
| A | CAD | 2020-06-16 | 0 |
| A | CAD | 2020-06-17 | 0 |
| A | CAD | 2020-06-18 | 0 |
| A | CAD | 2020-06-19 | 0 |
| A | CAD | 2020-06-20 | 0 |
| A | CAD | 2020-06-21 | 0 |
| A | CAD | 2020-06-22 | 0 |
| A | CAD | 2020-06-23 | 0 |
| A | CAD | 2020-06-24 | 0 |
| A | CAD | 2020-06-25 | 0 |
| A | CAD | 2020-06-26 | 0 |
| A | CAD | 2020-06-27 | 0 |
| A | CAD | 2020-06-28 | 0 |
| A | CAD | 2020-06-29 | 0 |
| A | CAD | 2020-06-30 | 0 |
| A | CAD | 2020-07-01 | 0 |
| A | CAD | 2020-07-02 | 0 |
| A | CAD | 2020-07-03 | 0 |
| A | CAD | 2020-07-04 | 0 |
| A | CAD | 2020-07-05 | 0 |
| A | CAD | 2020-07-06 | 0 |
| A | CAD | 2020-07-07 | 0 |
| A | CAD | 2020-07-08 | 0 |
| A | CAD | 2020-07-09 | 0 |
| A | CAD | 2020-07-10 | 0 |
| A | CAD | 2020-07-11 | 0 |
| A | CAD | 2020-07-12 | 0 |
| A | CAD | 2020-07-13 | 0 |
| A | CAD | 2020-07-14 | 0 |
| A | CAD | 2020-07-15 | 0 |
| A | CAD | 2020-07-16 | 0 |
| A | CAD | 2020-07-17 | 0 |
| A | CAD | 2020-07-18 | 0 |
| A | CAD | 2020-07-19 | 0 |
| A | CAD | 2020-07-20 | 0 |
| A | CAD | 2020-07-21 | 0 |
| A | CAD | 2020-07-22 | 0 |
| A | CAD | 2020-07-23 | 0 |
| A | CAD | 2020-07-24 | 0 |
| A | CAD | 2020-07-25 | 0 |
| A | CAD | 2020-07-26 | 0 |
| A | CAD | 2020-07-27 | 0 |
| A | CAD | 2020-07-28 | 0 |
| A | CAD | 2020-07-29 | 0 |
| A | CAD | 2020-07-30 | 0 |
| A | CAD | 2020-07-31 | 0 |
| A | CAD | 2020-08-01 | 0 |
| A | CAD | 2020-08-02 | 0 |
| A | CAD | 2020-08-03 | 0 |
| A | CAD | 2020-08-04 | 0 |
| A | CAD | 2020-08-05 | 0 |
| A | CAD | 2020-08-06 | 0 |
| A | CAD | 2020-08-07 | 0 |
| A | CAD | 2020-08-08 | 0 |
| A | CAD | 2020-08-09 | 0 |
| A | CAD | 2020-08-10 | 0 |
| A | CAD | 2020-08-11 | 0 |
| A | CAD | 2020-08-12 | 0 |
| A | CAD | 2020-08-13 | 0 |
| A | CAD | 2020-08-14 | 0 |
| A | CAD | 2020-08-15 | 0 |
| A | CAD | 2020-08-16 | 0 |
| A | CAD | 2020-08-17 | 0 |
| A | CAD | 2020-08-18 | 0 |
| A | CAD | 2020-08-19 | 0 |
| A | CAD | 2020-08-20 | 0 |
| A | CAD | 2020-08-21 | 0 |
| A | CAD | 2020-08-22 | 0 |
| A | CAD | 2020-08-23 | 0 |
| A | CAD | 2020-08-24 | 0 |
| A | CAD | 2020-08-25 | 0 |
| A | CAD | 2020-08-26 | 0 |
| A | CAD | 2020-08-27 | 0 |
| A | CAD | 2020-08-28 | 0 |
| A | CAD | 2020-08-29 | 0 |
| A | CAD | 2020-08-30 | 0 |
| A | CAD | 2020-08-31 | 0 |
| A | CAD | 2020-09-01 | 0 |
| A | CAD | 2020-09-02 | 0 |
| A | CAD | 2020-09-03 | 0 |
| A | CAD | 2020-09-04 | 0 |
| A | CAD | 2020-09-05 | 0 |
| A | CAD | 2020-09-06 | 0 |
| A | CAD | 2020-09-07 | 0 |
| A | CAD | 2020-09-08 | 0 |
| A | CAD | 2020-09-09 | 0 |
| A | CAD | 2020-09-10 | 0 |
| A | CAD | 2020-09-11 | 0 |
| A | CAD | 2020-09-12 | 0 |
| A | CAD | 2020-09-13 | 0 |
| A | CAD | 2020-09-14 | 0 |
| A | CAD | 2020-09-15 | 0 |
| A | CAD | 2020-09-16 | 0 |
| A | CAD | 2020-09-17 | 0 |
| A | CAD | 2020-09-18 | 0 |
| A | CAD | 2020-09-19 | 0 |
| A | CAD | 2020-09-20 | 0 |
| A | CAD | 2020-09-21 | 0 |
| A | CAD | 2020-09-22 | 0 |
| A | CAD | 2020-09-23 | 0 |
| A | CAD | 2020-09-24 | 0 |
| A | CAD | 2020-09-25 | 0 |
| A | CAD | 2020-09-26 | 0 |
| A | CAD | 2020-09-27 | 0 |
| A | CAD | 2020-09-28 | 0 |
| A | CAD | 2020-09-29 | 0 |
| A | CAD | 2020-09-30 | 0 |
| A | CAD | 2020-10-01 | 0 |
| A | CAD | 2020-10-02 | 0 |
| A | CAD | 2020-10-03 | 0 |
| A | CAD | 2020-10-04 | 0 |
| A | CAD | 2020-10-05 | 0 |
| A | CAD | 2020-10-06 | 0 |
| A | CAD | 2020-10-07 | 0 |
| A | CAD | 2020-10-08 | 0 |
| A | CAD | 2020-10-09 | 0 |
| A | CAD | 2020-10-10 | 0 |
| A | CAD | 2020-10-11 | 0 |
| A | CAD | 2020-10-12 | 0 |
| A | CAD | 2020-10-13 | 0 |
| A | CAD | 2020-10-14 | 0 |
| A | CAD | 2020-10-15 | 0 |
| A | CAD | 2020-10-16 | 0 |
| A | CAD | 2020-10-17 | 0 |
| A | CAD | 2020-10-18 | 0 |
| A | CAD | 2020-10-19 | 0 |
| A | CAD | 2020-10-20 | 0 |
| A | CAD | 2020-10-21 | 0 |
| A | CAD | 2020-10-22 | 0 |
| A | CAD | 2020-10-23 | 0 |
| A | CAD | 2020-10-24 | 0 |
| A | CAD | 2020-10-25 | 0 |
| A | CAD | 2020-10-26 | 0 |
| A | CAD | 2020-10-27 | 0 |
| A | CAD | 2020-10-28 | 0 |
| A | CAD | 2020-10-29 | 0 |
| A | CAD | 2020-10-30 | 0 |
| A | CAD | 2020-10-31 | 0 |
| A | CAD | 2020-11-01 | 0 |
| A | CAD | 2020-11-02 | 0 |
| A | CAD | 2020-11-03 | 0 |
| A | CAD | 2020-11-04 | 0 |
| A | CAD | 2020-11-05 | 0 |
| A | CAD | 2020-11-06 | 0 |
| A | CAD | 2020-11-07 | 0 |
| A | CAD | 2020-11-08 | 0 |
| A | CAD | 2020-11-09 | 0 |
| A | CAD | 2020-11-10 | 0 |
| A | CAD | 2020-11-11 | 0 |
| A | CAD | 2020-11-12 | 0 |
| A | CAD | 2020-11-13 | 0 |
| A | CAD | 2020-11-14 | 0 |
| A | CAD | 2020-11-15 | 0 |
| A | CAD | 2020-11-16 | 0 |
| A | CAD | 2020-11-17 | 0 |
| A | CAD | 2020-11-18 | 0 |
| A | CAD | 2020-11-19 | 0 |
| A | CAD | 2020-11-20 | 0 |
| A | CAD | 2020-11-21 | 0 |
| A | CAD | 2020-11-22 | 0 |
| A | CAD | 2020-11-23 | 0 |
| A | CAD | 2020-11-24 | 0 |
| A | CAD | 2020-11-25 | 0 |
| A | CAD | 2020-11-26 | 0 |
| A | CAD | 2020-11-27 | 0 |
| A | CAD | 2020-11-28 | 0 |
| A | CAD | 2020-11-29 | 0 |
| A | CAD | 2020-11-30 | 0 |
| A | CAD | 2020-12-01 | 0 |
| A | CAD | 2020-12-02 | 0 |
| A | CAD | 2020-12-03 | 0 |
| A | CAD | 2020-12-04 | 0 |
| A | CAD | 2020-12-05 | 0 |
| A | CAD | 2020-12-06 | 0 |
| A | CAD | 2020-12-07 | 0 |
| A | CAD | 2020-12-08 | 0 |
| A | CAD | 2020-12-09 | 0 |
| A | CAD | 2020-12-10 | 0 |
| A | CAD | 2020-12-11 | 0 |
| A | CAD | 2020-12-12 | 0 |
| A | CAD | 2020-12-13 | 0 |
| A | CAD | 2020-12-14 | 0 |
| A | CAD | 2020-12-15 | 0 |
| A | CAD | 2020-12-16 | 0 |
| A | CAD | 2020-12-17 | 0 |
| A | CAD | 2020-12-18 | 0 |
| A | CAD | 2020-12-19 | 0 |
| A | CAD | 2020-12-20 | 0 |
| A | CAD | 2020-12-21 | 0 |
| A | CAD | 2020-12-22 | 0 |
| A | CAD | 2020-12-23 | 0 |
| A | CAD | 2020-12-24 | 0 |
| A | CAD | 2020-12-25 | 0 |
| A | CAD | 2020-12-26 | 0 |
| A | CAD | 2020-12-27 | 0 |
| A | CAD | 2020-12-28 | 0 |
| A | CAD | 2020-12-29 | 0 |
| A | CAD | 2020-12-30 | 0 |
| A | CAD | 2020-12-31 | 0 |
| A | CAD | 2021-01-01 | 0 |
| A | CAD | 2021-01-02 | 0 |
| A | CAD | 2021-01-03 | 0 |
| A | CAD | 2021-01-04 | 5 |
| A | CAD | 2021-01-05 | 0 |
| A | CAD | 2021-01-06 | 6 |
| A | USD | 2020-01-01 | 3 |
| A | USD | 2020-01-02 | 0 |
| A | USD | 2020-01-03 | 4 |
| A | USD | 2020-01-04 | 2 |
| B | CAD | 2017-01-04 | 3 |
| B | CAD | 2017-01-05 | 0 |
| B | CAD | 2017-01-06 | 2 |
| B | CAD | 2017-01-07 | 2 |
| B | USD | 2019-01-01 | 3 |
| B | USD | 2019-01-02 | 0 |
| B | USD | 2019-01-03 | 4 |
| B | USD | 2019-01-04 | 5 |
使用 Simeon 的假数据，想到了使用 repeat 和 split_to_table 的替代方案。这个想法是为每个名称和货币创建我们需要的确切数量的组合，然后使用基于集合的逻辑来创建最终输出
with lookup (name, currency, min_date, day_count) as
(select name,currency, min(date), datediff(day,min(date),max(date))
from fake_data
group by name, currency)
select name, currency, date, amount --start with what you already have
from fake_data
union all
select name, currency, dateadd('day',b.index-1,min_date), 0 -- add in all the combinations
from lookup, lateral split_to_table(repeat('.',day_count), '.') b
minus
select name, currency, date, 0 --remove the combinations you already have the amounts for
from fake_data
order by name, currency, date