hive學習之經典sql50題 hive版(四)

21.查詢男生、女生人數  select f.c,m.c from ( select count(sid) c from student where ssex='男' ) f join ( select count(sid) c from student where ssex='女' ) m;ci 22.查詢名字中含有"風"字的學生信息 select * from student where sn

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