數(shù)據(jù)導(dǎo)入到HDFS文件系統(tǒng)中

數(shù)據(jù)導(dǎo)入到HDFS文件系統(tǒng)中學(xué)習(xí)目標(biāo)2知識(shí)目標(biāo)●導(dǎo)入文件到HDFS●啟動(dòng)Hive創(chuàng)建表能力目標(biāo)●Hive數(shù)據(jù)插入HDFS●掌握創(chuàng)建hive表學(xué)習(xí)任務(wù)3導(dǎo)入文件到HDFS加載數(shù)據(jù)到hdfs創(chuàng)建hive表Hive數(shù)據(jù)插入HDFSHive導(dǎo)入HDFS數(shù)據(jù)把hive的數(shù)據(jù)導(dǎo)入到hdfs或本地文件方式4目錄Hive數(shù)據(jù)插入HDFS報(bào)錯(cuò)案例Hive導(dǎo)入HDFS數(shù)據(jù)5準(zhǔn)備文件E:\hive\hdfs1.tx6Hive導(dǎo)入HDFS數(shù)據(jù)導(dǎo)入文件到HDFS啟動(dòng)Hive創(chuàng)建表hive>CREATETABLEhdfs1(idSTRING,nameSTRING)ROWFORMATDELIMITEDFIELDSTERMINATEDBY','..>;7Hive導(dǎo)入HDFS數(shù)據(jù)導(dǎo)入數(shù)據(jù)

hive>LOADDATAINPATH'/chy-data/hdfs1.txt'INTOTABLEhdfs1;顯示數(shù)據(jù)hive>select*fromhdfs1;8Hive導(dǎo)入HDFS數(shù)據(jù)數(shù)據(jù)導(dǎo)入完畢

數(shù)據(jù)導(dǎo)入完畢后發(fā)現(xiàn)hdfs中/chy-data/hdfs1.txt文件不見(jiàn)了，文件被移動(dòng)/user/hive/warehouse/hdfs1的目錄中9Hive數(shù)據(jù)插入HDFS報(bào)錯(cuò)案例

HDFS文件路徑：/user/test/qar_test.txt文件格式：***，***，***創(chuàng)建hive表

createtabletest_load(typeSTRING,numINT,timeSTRING)partitionedby(nameSTRING)//分區(qū)rowformatdelimitedfieldsterminatedby','//以逗號(hào)分隔storedasTEXTFILE10Hive數(shù)據(jù)插入HDFS報(bào)錯(cuò)案例導(dǎo)入HDFS文件數(shù)據(jù)loaddatainpath'hdfs://Master:9000/user/test/qar_test'intotabletest_loadpartition(name=‘MH');報(bào)錯(cuò)FAILED:SemanticExceptionLine1:17Invalidpath''hdfs://Master:9000/user/test/qar_test'':Nofiles

matchingpathhdfs://Master:9000/user/test/qar_test路徑不對(duì)很奇怪，再查詢MySQL數(shù)據(jù)庫(kù)（hive元數(shù)據(jù)放在MySQL數(shù)據(jù)庫(kù)中，其它方法類(lèi)似）11Hive數(shù)據(jù)插入HDFS報(bào)錯(cuò)案例報(bào)錯(cuò)查詢hive下的DBS表DB_LOCATION_URI列：selectDB_LOCATION_URIfromDBS;+----------------------------------------+|DB_LOCATION_URI

|+----------------------------------------+|hdfs://10.1.51.200:9000/hive/warehouse|+----------------------------------------+12把hive中的數(shù)據(jù)導(dǎo)入到hdfs或者本地文件的方式通過(guò)insert...directory方式導(dǎo)出數(shù)據(jù)到本地文件insertoverwritelocaldirectory'/opt/datas/hive/exp_hive'select*fromemp;insertoverwritelocaldirectory'/opt/datas/hive/exp_hive2'ROWFORMATDELIMITEDFIELDSTERMINATEDBY'\t'select*fromemp;加載數(shù)據(jù)到hdfsinsertoverwritedirectory'/user/senior/hive/exp_hive'select*fromemp;13把hive中的數(shù)據(jù)導(dǎo)入到hdfs或者本地文件的方式通過(guò)hive命令+grep|>

加載數(shù)據(jù)到本地bin/hive-e'select*fromdb_hive_0927.emp;'bin/hive-e'select*fromdb_hive_0927.