MySql合并行并在结果表中显示项目计数？

Question

是否可以从表中获得如下图所示的结果:

我怎么能用mysql查询呢？
谢谢,

Answer 1

SELECT `UID`, `USER`, COUNT(RID) AS "RID-Count", SUM(`COUNT`) AS COUNT
FROM TABLE1
GROUP BY `UID`, `USER`

假设catRID是NULL