hive-hadoop 常用命令
阿新 • • 發佈:2019-02-02
1.檢視hadoop任務
yarn application -list |grep 使用者名稱
yarn application -kill application_1443009203033_86621
2.liunx nohup命令
nohup ./label_driver.sh > /home/disk4/bi/driver_label/label_driver20150325.log 2>&1 &
nohup ./testpass.sh > logs/testpass_20150323.log 2>&1 &
3.hive新增欄位
ALTER TABLE label_driver_z add columns(total_miss_cnt int comment '累積爽約訂單數');
4.hive修改表分隔方式、修改空值描述符
ALTER TABLE city SET SERDEPROPERTIES ('field.delim' = '\t');
ALTER TABLE city SET SERDEPROPERTIES('serialization.format' = '\t');
ALTER TABLE city SET SERDEPROPERTIES('serialization.null.format' = '');
ALTER TABLE dm_market_acti_reg_d CHANGE dt dt int COMMENT '業務日期' FIRST boci;
ALTER TABLE employee RENAME TO emp;
ALTER TABLE dm_market_boci_first_call_d add COLUMNS (dt int comment '業務日期');
ALTER TABLE dw_customer add COLUMNS (ord_succ_d int comment '當日完成訂單數');
5.hive檢視函式的用法
desc function extended add_months;
6.hive查看錶儲存實際路徑
desc extended ods_order partition(dt=20151010);
7.hive insert語法
insert OVERWRITE table test_an select 11111111111,'a' from label_driver_basic limit 1;
mysql -uhive -p'xiaojukeji' -hhdp999.qq -P3306 --default-character-set=utf8 test
8.不開啟優化
set hive.fetch.task.conversion=minimal,more
set hive.exec.parallel=true;
9.檢視使用的分割槽
explain dependency query_str
10.刪除檔案
hadoop fs -rmr /user/rd/bi_dm/dm_tag_pass_ord_tot_d;
dfs -rmr /user/rd/bi_dm/app_driver_ord_distri_d;
11.hive選擇執行引擎
set hive.execution.engine=tez,spark,mr
set mapred.reduce.tasks=20;
12.手機號碼正則表示式
'^1[35847][0-9]{9}$'
13.查詢某個檔案
find . -name app_tag_pass1_info.sh
14.COALESCE( value1,value2,… )
17.hive刪除分割槽
ALTER TABLE login DROP IF EXISTS PARTITION (dt='2008-08-08');
20.壓縮命令
tar -cvf /tmp/etc.tar /etc
21.改變檔案目錄許可權
chown -R xiaoju /home/disk1/tagol-data/weather/
chgrp -R xiaoju /home/disk1/tagol-data/weather/
22.啟動langley
nohup /data/xiaoju/langley/srv/bin/langley_srv 9001 /data1 &
23.取文字第及列資料
cat test|awk '{print $2}'
awk '{print $1}' dw_pass_tagol_a_20150708.csv > tagol.csv