我需要单个查询来计算多个状态值...
表
+-------------+------------------+--------+
| ID | Name | Status |
+-------------+------------------+--------+
| 50 | Name1 | 1 |
| 49 | Name2 | 2 |
| 50 | Name1 | 1 |
| 49 | Name2 | 1 |
| 50 | Name1 | 2 |
| 50 | Name1 | 2 |
| 50 | Name1 | 3 |
| 50 | Name1 | 3 |
| 50 | Name1 | 1 |
+-------------+------------------+--------+
期待输出:
+-------------+------------------+--------------+--------------+--------------+
| ID | Name | Cnt(Status1) | Cnt(Status2) | Cnt(Status3) |
+-------------+------------------+--------------+--------------+--------------+
| 50 | Name1 | 3 | 2 | 2 |
| 49 | Name2 | 1 | 1 | 0 |
+-------------+------------------+--------------+--------------+--------------+
我需要查询上面的输出......
答案 0 :(得分:0)
您可以使用条件求和来执行此操作
select
id,
Name,
sum(Status=1) as cnt_status1,
sum(Status=2) as cnt_status2,
sum(Status=3) as cnt_status3
from table_name
group by id,Name
答案 1 :(得分:0)
我想这会解决问题:
SELECT
ID,
Name,
COUNT(CASE WHEN Status = 1 THEN 1 ELSE 0 END),
COUNT(CASE WHEN Status = 2 THEN 1 ELSE 0 END),
COUNT(CASE WHEN Status = 3 THEN 1 ELSE 0 END)
FROM TABLE
GROUP BY
ID,
Name