如何使用group by在sql上选择数据

Question

我有桌子

我想选择这样的

如何获取数据count_attendance？

Answer 1

您可以使用子查询来执行此操作：

select name, gol, count(attendance) as count_data,(Select count(attendance) from tablename n where n.attendance='yes' and n.name=tablename.name and n.gol=tablename.gol) as count_attendance from tablename group by name,gol

只需将tablename替换为您的表名。