www.3112.net > hivE sql语言问题,怎么按一列聚合第二列的多个值...

hivE sql语言问题,怎么按一列聚合第二列的多个值...

--假设表名为tbselect ys, count(*)from( select x, to_char(wm_concat(y)) ys from tb group by x ) wgroup by ys;

使用函数concat. select concat(a,'-',b) from ...

create table #t(ID int,Content varchar(4000))insert into #t(ID,Content)select 1,'22,5000,3000'union all select 2,'1,35,200,2'union all select 3,'802,22'union all select 4,'213,354,2002,22,500'select * from #t declare @sql nvarc...

什么意思?and就是同时满足限制条件,为什么会不起作用?可否发出你的语句跟结果的截图。

代码如下: select * from tbl_DPImg where ID in (select min(ID) from tbl_DPImg group by DPID)处理后结果为: 查找表中多余的重复记录,重复记录是根据单个字段(teamId)来判断 select * from team where teamId in (select teamId from tea...

select orderid,fenjian,timee from ( select orderid,fenjian,timee,row_number(orderid,fenjian) rn from ( select orderid,fenjian,timee from tableName distribute by orderid,fenjian sort by orderid,fenjian,timee asc ) t1 ) t2 where ...

操作方法如下: 把SQL语句写成存储过程,这样以后每次只需要调用存储过程就行了

sql="update 数据表 set 字段1=值1,字段2=值2……字段n=值n where 条件表达式"

通过hive自带的server2的thrift模式提交的sql可以获得状态进度,jdbc方式没有试过。其实,我们完全可以不使用hive,sql-on-Hadoop的框架有ibm的bigsql,Apache的dirll,impala等都是非常不错的,都可以替代hive。速度都比hive要快很多。偶理解HI...

ParseException line 3:14 missing EOF at 'from' near ')' 第3行,14字符解析,是因为 from 前面少一个空格嘛? select sum(b) from (

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