计数出现的总和

Question

我有以下查询：

SELECT num1
    -> from table4
    -> WHERE suffix IN ('mt', 'dn')
    -> GROUP BY num1
    -> HAVING COUNT(DISTINCT suffix) = 2;

这向我展示了以下内容：

1563866656871111 
1563866656876839 
1563866656878888 
1563867854324841

我怎样才能只得到一个数字 4？

感谢您的任何帮助 ：）

Answer 1

您可以包装现有的查询：

SELECT COUNT(*)
FROM (
    SELECT num1
    FROM table4
    WHERE suffix IN ('mt', 'dn')
    GROUP BY num1
    HAVING COUNT(DISTINCT suffix) = 2
) x

注意：鉴于您的示例数据，这将返回3 ，而不是4 。

Answer 2

在您的问题修改后，您似乎需要以下

SELECT num1
FROM table4
WHERE suffix IN ('mt', 'dn')
GROUP BY num1
HAVING COUNT(DISTINCT suffix)!<>2

Answer 3

如果你想要行数，那么你会得到它。

SELECT COUNT(x.num1)
    FROM (
        SELECT num1
        FROM table4
        WHERE suffix IN ('mt', 'dn')
        GROUP BY num1
        HAVING COUNT(DISTINCT suffix) = 2
    ) x

Answer 4

+-----------------+------+----------------+------------+------------------+------+--------+
| date            | host | process        | text       | num1             | num2 | suffix |
+-----------------+------+----------------+------------+------------------+------+--------+
| Jul 23 09:24:16 | mmr  | mmr-core[4268] | Aweg3AOMTs | 1563866656876839 |    0 | mt     |
| Jul 23 09:24:16 | mmr  | mmr-core[4268] | Aweg3AOMTs | 1563866656876839 |    0 | mt     |
| Jul 23 09:24:16 | mmr  | mmr-core[4268] | Aweg3AOMTs | 1563866656876839 |    0 | mt     |
| Jul 23 09:24:16 | mmr  | mmr-core[4268] | Aweg3AOMTs | 1563866656876839 |    0 | mt     |
| Jul 23 09:24:16 | mmr  | mmr-core[4268] | Aweg3AOMTs | 1563866656876839 |    0 | mt     |
| Jul 23 09:24:16 | mmr  | mmr-core[4268] | Aweg3AOMTs | 1563866656876839 |    0 | mt     |
| Jul 23 09:24:16 | mmr  | mmr-core[4268] | Aweg3AOMTs | 1563866656876839 |    0 | mt     |
| Jul 23 09:24:16 | mmr  | mmr-core[4268] | Aweg3AOMTs | 1563866656876839 |    0 | mt     |
| Jul 23 09:24:16 | mmr  | mmr-core[4268] | Aweg3AOMTs | 1563866656876839 |    0 | mt     |
| Jul 23 09:24:16 | mmr  | mmr-core[4268] | Aweg3AOMTs | 1563866656876839 |    0 | mt     |
| Jul 23 09:24:16 | mmr  | mmr-core[4268] | Aweg3AOMTs | 1563866656876839 |    0 | dn     |
| Jul 23 09:24:16 | mmr  | mmr-core[4268] | Aweg3AOMTs | 1563866656876839 |    0 | dn     |
| Jul 23 09:24:16 | mmr  | mmr-core[4268] | Aweg3AOMTs | 1563866656876839 |    0 | dn     |
| Jul 23 09:24:16 | mmr  | mmr-core[4268] | Aweg3AOMTs | 1563866656876839 |    0 | dn     |
| Jul 23 09:24:16 | mmr  | mmr-core[4268] | Aweg3AOMTs | 1563866656873333 |    0 | mt     |
| Jul 23 09:24:16 | mmr  | mmr-core[4268] | Aweg3AOMTs | 1563866656873333 |    0 | mt     |
| Jul 23 09:24:16 | mmr  | mmr-core[4268] | Aweg3AOMTs | 1563866656873333 |    0 | mt     |
| Jul 23 09:24:16 | mmr  | mmr-core[4268] | Aweg3AOMTs | 1563866656873333 |    0 | mt     |
| Jul 23 09:24:16 | mmr  | mmr-core[4268] | Aweg3AOMTs | 1563866656873333 |    0 | mt     |
| Jul 23 09:24:16 | mmr  | mmr-core[4268] | Aweg3AOMTs | 1563866656873333 |    0 | mt     |
| Jul 23 09:24:16 | mmr  | mmr-core[4268] | Aweg3AOMTs | 1563866656873333 |    0 | dn     |
| Jul 23 09:24:16 | mmr  | mmr-core[4268] | Aweg3AOMTs | 1563866656873333 |    0 | dn     |

我需要显示2的查询，因为编号1563866656876839并带有后缀“ dn”和“ mt”