RDBMS internal operation
Soham Mukherjee
sohammm1087 at gmail.com
Mon Nov 7 13:30:23 UTC 2022
I have a table with ten columns and would want to choose column 1
and column 9 from it. How many columns should be selected
internally in RDBMS? Also, I'm not an expert in 3-Level
Architecture of DBMS to understand [data
independence](https://www.scaler.com/topics/data-independence-in-dbms/) but I've read several resources.
I'm asking about Oracle, but I'm also learning hbase, so I'm a
little confused. I'm not a database guy; I'm a java guy who is
now into Hadoop and hasn't touched a database in over a year.
There are other reasons for this, but we will not go into them. I
am very aware of what I am doing. I'm a newbie MR coder, but I'm
doing okay with my part of the code.
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