问题
I have the following query that gives me aggregated data that I would like to pivot:
select provider, title, hd_or_sd, SUM(customer_price), count(distinct title)
from `100` group by provider, title, hd_or_sd with rollup
I would like to pivot on the sd_or_hd column, so that my result looks like:
hd sd total
provider title rev. count rev. count rev. count
DISTRIBBER 16.99 1 16.99 1
DISTRIBBER finding Joe 16.99 1 16.99 1
How would I do this query? Also, I have noticed that the Rollup is not perfect -- for example, with Electric entertainment, it shows 5 titles but has the hd_or_sd value "HD", even though several of those titles are SD. Why does this occur?
Here is a sample of the data: http://sqlfiddle.com/#!9/a9b5d9/1. And here is what the final result should be (minus the strange number formatting) --
Note that I'd also like to accomplish this without using CASE statements as the pivoted column could potentially have many different values.
回答1:
You need to use SUM with CASE Operator, like this:
select provider, title,
sum(case when hd_or_sd = 'HD' then 1 else 0 end) as HD,
sum(case when hd_or_sd = 'SD' then 1 else 0 end) as SD,
sum(case when hd_or_sd = 'HD' then customer_price else 0 end) as HD_price,
sum(case when hd_or_sd = 'SD' then customer_price else 0 end) as SD_price,
sum(customer_price) revenue from `100`
group by provider, title
with rollup
Result:
| provider | title | HD | SD | HD_price | SD_price | revenue |
|------------------------|----------------------------|----|----|----------|----------|---------|
| DISTRIBBER | Finding Joe | 0 | 1 | 0 | 16.99 | 16.99 |
| DISTRIBBER | (null) | 0 | 1 | 0 | 16.99 | 16.99 |
| Echo Bridge | Do Something | 0 | 1 | 0 | 1.99 | 1.99 |
| Echo Bridge | Down in LA | 2 | 2 | 0 | 0 | 0 |
| Echo Bridge | The L.A. Complex, Season 1 | 0 | 1 | 0 | 19.99 | 19.99 |
| Echo Bridge | The Other Side of the Door | 1 | 2 | 2.99 | 3.98 | 6.97 |
| Echo Bridge | Who You Know | 0 | 2 | 0 | 3.98 | 3.98 |
| Echo Bridge | (null) | 3 | 8 | 2.99 | 29.94 | 32.93 |
| Electric Entertainment | Leverage, Season 4 | 0 | 1 | 0 | 31.99 | 31.99 |
| Electric Entertainment | The Cross My Heart Job | 1 | 0 | 2.99 | 0 | 2.99 |
| Electric Entertainment | The Inside Job | 0 | 1 | 0 | 1.99 | 1.99 |
| Electric Entertainment | The Radio Job | 0 | 1 | 0 | 1.99 | 1.99 |
| Electric Entertainment | The Scheherazade Job | 1 | 0 | 2.99 | 0 | 2.99 |
| Electric Entertainment | (null) | 2 | 3 | 5.98 | 35.97 | 41.95 |
| HALLMARK | The Good Witch's Gift | 0 | 1 | 0 | 3.99 | 3.99 |
| HALLMARK | (null) | 0 | 1 | 0 | 3.99 | 3.99 |
| Quebec Inc. | 2 Frogs In the West | 1 | 0 | 5.99 | 0 | 5.99 |
| Quebec Inc. | (null) | 1 | 0 | 5.99 | 0 | 5.99 |
| VIRGIL | One Lucky Elephant | 0 | 1 | 0 | 3.99 | 3.99 |
| VIRGIL | (null) | 0 | 1 | 0 | 3.99 | 3.99 |
| (null) | (null) | 6 | 14 | 14.96 | 90.88 | 105.84 |
SQL Fiddle
Alternatively, you can just simply ROLLUP by hd_or_sd and have the PIVOT done in the application, like this:
select provider, title, hd_or_sd,
sum(customer_price) revenue from `100`
group by provider, hd_or_sd, title
with rollup
来源：https://stackoverflow.com/questions/42381948/adding-a-pivot-to-a-rollup