如：日志文件—>表數據

EDUCATIONTOCREATEABRIGHT

EDUCATIONTOCREATEABRIGHTMapReduceishardtoNoSchemalackofquerylanaguageseg.SQL

EDUCATIONTOCREATEABRIGHTApache

EDUCATIONTOCREATEABRIGHTWhatisHive

EDUCATIONTOCREATEABRIGHT

EDUCATIONTOCREATEABRIGHTHive

EDUCATIONTOCREATEABRIGHTuuuEDUCATIONTOCREATEABRIGHTEDUCATIONTOCREATEABRIGHTEDUCATIONTOCREATEABRIGHTEDUCATIONTOCREATEABRIGHTEDUCATIONTOCREATEABRIGHT#createtablecreatetableuser(idint,namestring)ROWFORMATDELIMITEDFIELDSTERMINATEDBY'\t'#loadloaddatalocalinpath'/opt/datas/user2.tsv'overwriteintotableuser;#querydataselect*fromuser##Hive

EDUCATIONTOCREATEABRIGHTHive

EDUCATIONTOCREATEABRIGHTCLI(hive ?元數據: 默 ?驅動器:

Hive

EDUCATIONTOCREATEABRIGHT select中被判定為聚合的字段在groupby中是否有出現)；Hive

EDUCATIONTOCREATEABRIGHT

EDUCATIONTOCREATEABRIGHTDerbyApacheDerby是一個完全用java編寫的基于ApacheLicense2.0分發。 系統上。ApacheDerby非常小巧，部分derby.jar只有2M，所以既可

EDUCATIONTOCREATEABRIGHTSupportedBackendDatabasesfor

EDUCATIONTOCREATEABRIGHTMySQL

EDUCATIONTOCREATEABRIGHT MySQL

EDUCATIONTOCREATEABRIGHT

EDUCATIONTOCREATEABRIGHTmysql>selectUser,Host,Passwordfrom#設 mysql>grantallprivilegeson*.*to'root'@'%'identifiedby'123456'withgrantmysql>deletefromuserwhereuser='root'andmysql>flush重啟servicemysqld

EDUCATIONTOCREATEABRIGHTHiveBasic

EDUCATIONTOCREATEABRIGHT

EDUCATIONTOCREATEABRIGHTHive

EDUCATIONTOCREATEABRIGHT SQLfromcommand SQLfrom?-v,--verboseVerbosemode(echoexecutedSQLtothe Silentmodein ctiveHiveHiveEDUCATIONTOCREATEABRIGHT ?set?set-v?queryu

EDUCATIONTOCREATEABRIGHT

EDUCATIONTOCREATEABRIGHTShow

EDUCATIONTOCREATEABRIGHTDescribe

EDUCATIONTOCREATEABRIGHT

EDUCATIONTOCREATEABRIGHT

EDUCATIONTOCREATEABRIGHT

EDUCATIONTOCREATEABRIGHTCreate

EDUCATIONTOCREATEABRIGHTu

ucreatetablecreatetableemp(empnoint,enamestring,jobmgrint,saldouble,commdouble,deptnoint)rowformatdelimitedfieldsterminatedbycreatetabledept(deptnoint,dnamestring,loc)rowformatdelimitedfieldsterminatedbyLoad

EDUCATIONTOCREATEABRIGHTLOADLOADDATA[LOCAL]INPATHloadloaddatalocalinpath'/home/hadoop/data/emp.txt'overwriteintotableloaddatalocalinpath'/home/hadoop/data/dept.txt'overwriteintotableCreateTableCreateTableAsSelect)EDUCATIONTOCREATEABRIGHT

EDUCATIONTOCREATEABRIGHT

EDUCATIONTOCREATEABRIGHT

EDUCATIONTOCREATEABRIGHTExternal

EDUCATIONTOCREATEABRIGHT External

EDUCATIONTOCREATEABRIGHT

EDUCATIONTOCREATEABRIGHTu分區表實際上就是對應一個HDFS文件系統上的獨立的文件夾，該文件夾下是該分區所有 ，把一個大的數據集根據業務需要分割更小成的u在查詢時通過WHERE子句中的表達式來選擇查詢所需要的指定的分區，這樣的查詢效率createtabledept_partition(deptnocreatetabledept_partition(deptnoint,dnamestring,locstring)PARTITIONEDBY(event_monthROWFORMATDELIMITEDFIELDSTERMINATE