What is the difference between Hive and traditional databases (Mysql/Oracle)?
The query language is different, the traditional database uses SQL statements, and hive is an integrated HQL statement. The
data storage place is different, which is different from the traditional database stored in the raw device or local file system (Raw Device or Local FS), and Hive is stored in the HDFS.
Execution The method is different, the traditional database is executed by the Executive unit, hive is MapReduce
and the hive execution delay is high, the processing data scale is large, and there is no index (bitmap index is added after version 0.8, and mysql has complex indexes), which are the difference between hive and traditional .
