sql语句 疑问
sql语句 疑问sql="select b.*,a.house_no,a.house_id,a.house_s_id,c.jiaoxing_time,d.birthday_m,d.birthday_d from xiaofei b,house a,xiaofei_jiaoxing c,ka d,xiaofei_id_pircedetails e where a.house_id=b.house_id and b.ruzhu_time is not null and b.id *=c.xiaofei_id and b.ka_no *=d.ka_no and b.id=e.xiaofei_id
b.id *=c.xiaofei_id and b.ka_no *=d.ka_no
这里还有* 号 是什么意思了?