MySQL 总计行数和列数

Question

我不仅要汇总一组数据的主分组，还要汇总下一级分组。在我的例子中，ROLLUP 汇总了一个月的值（行），但我还想汇总销售代表的值（列）。

我迄今为止的最大努力：

CREATE TABLE IF NOT EXISTS SALES (
Month INT(3),
Rep CHAR(60),
Val DECIMAL (20 , 6 )
);

INSERT INTO SALES (Month, Rep, Val) VALUES
('9','Rep1',10),
('9','Rep1',20),
('9','Rep2',20),
('9','Rep2',30),
('9','Rep2',40),
('10','Rep1',50),
('10','Rep1',60),
('10','Rep2',70),
('11','Rep2',80);

SELECT Month, IFNULL(Rep, 'Total'), SUM(Val) As TotalValue
FROM SALES 
GROUP BY FIELD(Month,
    '9',
    '10',
    '11') ASC, Rep WITH ROLLUP

生成以下内容

9   Rep1    30
9   Rep2    90
9   Total   120
10  Rep1    110
10  Rep2    70
10  Total   180
11  Rep2    80
11  Total   80
11  Total   380

理想情况下，我希望它显示

9   Rep1    30
9   Rep2    90
9   Total   120
10  Rep1    110
10  Rep2    70
10  Total   180
11  Rep2    80
11  Total   80
11  Total   380
0   Rep1   140
0   Rep2   240

Answer 1

例如（尽管实际上我可能会在应用程序代码中处理摘要数据）：

SELECT * FROM (SELECT month,rep,SUM(val) val FROM sales GROUP BY month,rep WITH ROLLUP) x
UNION
SELECT 0,rep, SUM(val) FROM sales GROUP BY rep;
+-------+------+------------+
| month | rep  | val        |
+-------+------+------------+
|     9 | Rep1 |  30.000000 |
|     9 | Rep2 |  90.000000 |
|     9 | NULL | 120.000000 |
|    10 | Rep1 | 110.000000 |
|    10 | Rep2 |  70.000000 |
|    10 | NULL | 180.000000 |
|    11 | Rep2 |  80.000000 |
|    11 | NULL |  80.000000 |
|  NULL | NULL | 380.000000 |
|     0 | Rep1 | 140.000000 |
|     0 | Rep2 | 240.000000 |
+-------+------+------------+

MySQL 总计行数和列数

MySQL Grand Total Rows and Columns

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