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I have a payments table with the following fields:

  • id (int)
  • status (successful, failed, refunded)
  • amount (int)
  • pdate (Y-m-d format)

I need to write a query to get, for each day how many payments were successful, how many failed and how many were refunded, with the percentage for that day. My current query is this:

select pdate, status, count(*) as total
from payments
group by pdate, status

The query successfully returns how many payments were processed on each day and the status:

2019-04-01,  successful,  10
2019-04-01,  failed,       5
2019-04-01,  refunded,     5
2019-04-02,  successful,  12
2019-04-02,  failed,       5
2019-04-02,  refunded,     3

But I don't know how to make it calculate the percentage for each payment for each day. For example, for 2019-04-01 there were 20 payments so, the percentage of successful payments = 50%, failed = 25% and refunded = 25%.

How can I make it return this?

2019-04-01,  successful,  10, 50%
2019-04-01,  failed,       5, 25%
2019-04-01,  refunded,     5, 25%
2019-04-02,  successful,  14, 58.3%
2019-04-02,  failed,       4, 16.6%
2019-04-02,  refunded,     6, 25%

My problem is how to make it count the total number of payments on each day so I can calculate the percentage?

Thanks in advance!

1 Answer 1

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SELECT pdate, 
       COUNT(status) total, 
       SUM(status='successful') successful,
       SUM(status='failed') failed,
       SUM(status='refunded') refunded, 
       SUM(status='successful')/COUNT(status)*100 successful_percent,
       SUM(status='failed')/COUNT(status)*100 failed_percent,
       SUM(status='refunded')/COUNT(status)*100 refunded_percent
FROM payments
GROUP BY pdate
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  • Thanks very much for your reply @Akina. I've edited my question and included an example of the "ideal" result set. Is it possible to have that structure via query? Apr 10, 2019 at 12:51
  • Is it possible to have that structure via query? Of course. But now you MUST specify your MySQL version.
    – Akina
    Apr 10, 2019 at 13:46
  • mysql Ver 14.14 Distrib 5.7.25, for Linux (x86_64) Apr 10, 2019 at 13:50

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