写hive 用in 如分时段,分类型,分平台统计点击量 select substr(createtime,12,2) hour,logtype,os_id,count(*) from wizad_mdm_raw_hdfs raw where ad_id in ('19829','19830','19831','26657d5ff9020d2abefe558796b99584') and adn=5 group by substr(createtime,12,2),logtype,os_id…
Hive 的 JOIN 用法 hive只支持等连接,外连接,左半连接.hive不支持非相等的join条件(通过其他方式实现,如left outer join),因为它很难在map/reduce中实现这样的条件.而且,hive可以join两个以上的表. 1.等连接 只有等连接才允许 hive> SELECT a.* FROM a JOIN b ON (a.id = b.id); hive> SELECT a.* FROM a JOIN b ON (a.id = b.id AND a.depart…
测试环境 Hive 1.2.1000.2.6.0.3-8 set hive.support.concurrency=true; set hive.exec.dynamic.partition.mode=nonstrict; set hive.txn.manager=org.apache.hadoop.hive.ql.lockmgr.DbTxnManager; set hive.compactor.initiator.on=true; ; drop table tmp_ccc_20180716;…
错误:Unsupported major.minor version 51.0(jdk版本错误)的解决方法 java.lang.UnsupportedClassVersionError: org/apache/nutch/crawl/Crawl3 : Unsupported major.minor version 51.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineCla…