Before work, recently learn Java, but the work done by the ETL is the background, to be familiar with the loading and unloading, completely don't understand, Daniel, genuflect is begged

CodePudding user response:

Loading and unloading? Haven't heard completely, with small white asked

CodePudding user response:

The concept of ETL is loading and unloading, generally has three steps:
ETL, is the abbreviation of English Extract - Transform - Load, used to describe the data abstracted from the source end (Extract), conversion (Transform), the process Load (Load) to purpose,

CodePudding user response:

Oracle, loading and unloading the concept is more general, can write their own stored procedures to operate, can write SHELL, can use SQLLDR tools etc

CodePudding user response:

Consult the concept what do you mean