TSQL - 生成Quarter输出

Question

我有一个表格，附有3列X，日期和Qtr。

我需要获得附件中提到的输出（仅8个季度的数据）

create table mQtr
( X varchar(5), XDate  date, Qtr int);

insert into mQtr 
values ('X1', '2011-11-01', 4), ('X2', '2011-10-01', 4),
       ('X3', '2011-09-01', 3), ('X4', '2011-08-01', 3),
       ('X5', '2011-07-01', 3), ('X6', '2011-06-01', 2),
       ('X7','2011-05-01',2), ('X8','2011-04-01',2),
       ('X9','2011-03-01',1), ('X10','2011-02-01',1),
       ('X11','2011-01-01',1), ('X12','2010-12-01',4),
       ('X13','2010-11-01',4), ('X14','2010-10-01',4),
       ('X15','2010-09-01',3), ('X16','2010-08-01',3),
       ('X17','2010-07-01',3), ('X18','2010-06-01',2),
       ('X19','2010-05-01',2), ('X20','2010-04-01',2),
       ('X21','2010-03-01',1), ('X22','2010-02-01',1),
       ('X23','2010-01-01',1), ('X24','2009-12-01',4)

我期望基于Qtr值的以下结果集，我想生成X值的总和。输出应该是这样的：

Qtr     mOutput
----------------    
1       x1+x2
2       x3+x4+x5
3       x6+x7+x8
4       x9+x10+x11
5       x12+x13+x14
6       x15+x16+x17
7       x18+x19+x20
8       x21+x22+x23

请帮我构建查询。

谢谢， 纳温

Answer 1

您可以在声明中使用SELECT type, GROUP_CONCAT(DISTINCT uid ORDER BY id DESC) AS users, COUNT(type) AS typeCount FROM (SELECT * FROM `test2` ORDER BY id DESC) test2 GROUP BY type 和JOIN GROUP BY。 This Link可能很有用