Sql 创建透视表以显示计数并将缺少的月份添加为列

原始表格

id month
1  10/2017
1  10/2017
1  11/2017
2  1/2017
2  3/2017
3  9/2016
3  9/2016
3  5/2017
3  6/2017
3  6/2017
3  10/2017

更新表：

id  9/2016 10/2016 11/2016 12/2016 1/2017 2/2017 3/2017 4/2017 5/2017 6/2017 7/2017 8/2017 9/2017 10/2017 11/2017
1   0      0       0       0       0      0      0      0      0      0      0      0      0      2       1
2   0      0       0       0       1      0      1      0      0      0      0      0      0      0       0
3   2      0       0       0       0      0      0      0      1      0      0      0      0      1       0

我通常使用python和pandas，所以我不确定如何在SQL中实现这一点

任何帮助都将不胜感激

更新到查询：

select
    sum(case when quarter = '2006-07-01' THEN 1 ELSE 0 END) AS '2006Q3',
    sum(case when quarter = '2006-10-01' THEN 1 ELSE 0 END) AS '2006Q4',
    sum(case when quarter = '2007-01-01' THEN 1 ELSE 0 END) AS '2007Q1',
    sum(case when quarter = '2007-04-01' THEN 1 ELSE 0 END) AS '2007Q2',
...
from trans_v3
group by core_id

---

好吧，你可以用暴力强迫它：

SELECT SUM(CASE WHEN month = '9/2016' THEN 1 ELSE 0 END) AS 201609
     , SUM(CASE WHEN month = '10/2016' THEN 1 ELSE 0 END) AS 201610
...
FROM t
GROUP BY id

---

SQL是静态类型语言。在查询开始执行之前，需要知道列的集合。这意味着您将需要在查询中嵌入此信息。（如@kjmerf answer中所示）。我稍微更改了列名，但得到了以下错误：

输入不匹配的“2016q3”

。我不确定这是怎么回事。你能分享整个问题吗？我想你已经解决了问题？