by语句，则必须在over()函数中指定partition by子句。否则，Hive将无法识别distribute by语句，从而导致...
row_number() over(distribute by order_num,accounts_time,turnover_price,totals,source_name,receipt_addr_id,station_name,is_arrive,driver_name,driver_phone,truck_tou_no,truck_pai_no,buy_weigth_num,times) as rn from a_jj_aks_sm_m_h ) t where t.rn=1 ; /**注意: *“distribute by”后...
first_value(log_time) over(distribute by user_type order by log_time) first_time, last_value(log_time) over(distribute by user_type order by log_time) from access_log select user_id from (select count(user_id) cnt row_number() over(distribute by user_type order by count(user_id)) ...
bad_sql: insert into table a select row_number() over (distribute by a sort by b desc) as sort_id from b;
目录 一、Hive 中row_number()函数介绍 二、使用示例 三、总结 四、附录 在Oracle中,我们经常会用到row_number() over(partition by clo1 order by clo2 desc) 方法来取表中clo1 重复记录clo2最大的一条或几条记录,那在Hive上row_number()是否存在这个函数,其具体的用法是怎么样的呢?下面我们通过具体的示...
Version : 1.1.10 SQL : select column01,column02,row_number() over (distribute by column01 sort by column02 desc) rownum from table01; code : String dbType = JdbcConstants.HIVE; List stmtList = SQLUtils.parseStatements(sql, dbType); Excep...
last_value(字段) over(…) 返回当前窗口第一行到当前行的记录中最后一行的值 排名函数:对窗口内的行按顺序显示排名,具体排名时选择哪个,还是看需求 row_number() over(partition by 字段 order by 字段) row_number() over(distribute by 字段 sort by 字段) ...
亦或者distribute by xxx sort by xxx(asc/desc) partition by 即分组,order by 为排序 实际案例: select * from tmp_test; c1 c2 --- --- 1 str1 2 str2 3 str3 3 str31 3 str33 4 str41 4 str42 select t.*,row_number() over(distribute by c1 sort by c2 desc) rn from tmp...
Hive窗口函数row_number案例 数据文件是:rownumbertest.txt 字段信息是:id,sex,age,name 用户信息表 数据结果展示: 需求:每种性别人群中,年龄最大的两个人,TopN的需求:分组取前几 核心思路: distribute by 和 sort by 搭配使用 partition by 和 order by 搭配使用 结果: SQL语句: 结果: ......
hive>selectc1,c2,row_number()over(distributebyc1>sortbyc2desc) rownum>fromtest_s ; OK c1 c2 rownum1str112str213str3313str3123str334str4214str412Timetaken:17.23seconds, Fetched:7row(s) hive>>>desctest_c; OK col_name data_type comment ...