mysql：如何过滤列数据

Question

我有下表“matchdetail”：

txtProjectdate	txtProjectGroup	txtMember
2022-03-01T00:00:00	AMT	steve
2022-03-01T00:20:00	SSIT	Parvq
2022-03-01T01:05:00	AMT	Parvq
2022-03-01T01:05:00	VALOK	Shveas
2022-03-01T01:05:00	RPC	modi
2022-03-01T01:05:00	VALOK	khan
2022-03-01T01:05:00	AMT	lkhmi
2022-03-01T01:05:00	BIK	lkhmi
2022-03-01T01:06:00	AMT	steve

我需要如下输出：

txtProjectGroup	Count	txtMember
AMT	2	steve
VALOK	1	Shveas
RPC	1	modi
VALOK	1	khan
SSIT	1	Parvq
BIK	1	lkhmi
AMT	1	Parvq
AMT	1	lkhmi

是否有可能收到如下结果？

Answer 1

您必须使用 COUNT 和 GROUP BY 子句之类的聚合函数来标识要分组的字段：

SELECT 
    txtProjectGroup,
    COUNT(txtProjectdate) AS Count
    txtMember,
FROM 
    table
GROUP BY 
    txtProjectGroup,
    txtMember