在线等,sql一次查询多个条件的统计答:创建表。插入数据 create table a(id int,name varchar(1),category varchar(2),other varchar(2),count int);insert into a values (1,'a','xx','dd',1);insert into a values (2,'a','xx','ff',1);insert into a values (3,'a','yy','dd',1);insert into a values (4,...