How to realize the alternative method of ROLLUP in MySQL
Editor to share with you how to achieve the alternative to ROLLUP in MySQL, I believe that most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!
After extracting the data from MySQL and using ROLLUP statistics, you want to add the project name to the left column of the data and use SQL
Sql code
SELECT (CASE WHEN ISNULL (PLAYERNO) THEN PLAYERNO=TOTAL ELSE PLAYERNO END) AS PLAYERNO,SUM (AMOUNT) FROM penalties
GROUP BY PLAYERNO WITH ROLLUP
The result is:
Like this
+-+ +
| | PLAYERNO | SUM (AMOUNT) |
+-+ +
| | 6 | 100.00 | |
| | 8 | 25.00 |
| | 27 | 175.00 | |
| | 44 | 130.00 | |
| | 104 | 50.00 |
| | NULL | 480.00 | |
+-+ +
6 rows in set, 1 warning (0.00 sec)
Displayed as a null value, modified as follows:
Sql code
SELECT PLAYERNO,SUM (AMOUNT) FROM penalties
GROUP BY PLAYERNO
UNION
SELECT TOTAL,SUM (AMOUNT)
FROM penalties
Display the results:
+-+ +
| | PLAYERNO | SUM (AMOUNT) |
+-+ +
| | 6 | 100.00 | |
| | 8 | 25.00 |
| | 27 | 175.00 | |
| | 44 | 130.00 | |
| | 104 | 50.00 |
| | TOTAL | 480.00 | |
+-+ +
6 rows in set (0.00 sec)
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