COUNT和Group By MYSQL之后的SUM

Question

我想问一下mysql中的SQL。我堆叠超过1小时:(
我有sql：

    SELECT TZL.IsMissed, COUNT(TZL.ChatID) as Amount FROM tblLog TZL group by TZL.IsMissed

结果：

| IsMissed | Amount |
|        0 |    100 |
|        1 |    500 |

我想在Amount列之后再添加一列，假设新列的名称是 SumAmount 。
我希望 SumAmount 值为 SUM 金额列。

| IsMissed |金额| SumAmount |
| 0 | 100 | 600 |
| 1 | 500 | 600 |

我已经尝试过如下的SQL：

SELECT
    tbl.*,SUM(tbl.Amount) as SumAmount
FROM
    (
        SELECT
            TZL.IsMissed,
            COUNT(TZL.ChatID) AS Amount
        FROM
            tblLog TZL
        GROUP BY
            TZL.IsMissed
    ) tbl
GROUP BY
tbl.IsMissed 
WITH ROLLUP

但是使用 ROLLUP ，结果会添加一行，而不是列。谁能教我这个？ 谢谢你的回答

Answer 1

有几种方法可以解决这个问题。我会计算from子句中的值：

SELECT TZL.IsMissed, COUNT(TZL.ChatID) as Amount, tt.SumAmount
FROM tblLog TZL CROSS JOIN
     (SELECT COUNT(*) as SumAmount FROM tblLog) tt
GROUP BY TZL.IsMissed, tt.SumAmount;