Oracle Magazine, July/August 2017
Database Developer and DBA ETL For example to meet the stringent data integrity needs of financial transaction processing applications Oracle Database is a natural technology fit but for simpler key value pair requirements a business may opt for Oracle NoSQL Database The fundamental unit of storage in many NoSQL databases is a document and rather than using multiple relational structures a NoSQL database stores data in much larger chunks typically in documents of a proprietary format or an open standard such as JavaScript Object Notation JSON It is already possible to query data from for example a Hadoop Distributed File System HDFS datastore by creating and using an external table definition in Oracle Database SQL create table CUSTOMER_ RAWDATA 2 customer_ number number 3 customer_ name varchar2 50 4 postal_ code char 5 5 6 organization external 7 type oracle_ hdfs 8 default directory TEMP 9 access parameters 10 11 com oracle bigdata cluster hadoop_ clust 12 com oracle bigdata rowformat delimited fields terminated by 13 14 location hdfs p1a dat 15 hdfs p1b dat ORACLE MAGAZINE JULY AUGUST 2017 89
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