I am confused, what should I learn first : R, Python or SQL?

Answer 1

Depends on your goals and priorities.
SQL is used for handling databases.
R is a specialized language used for statistical analysis and data visualization.
Python is an universal language that can be used for just about anything.

If you are a beginner and just want to get started with coding, go with Python. You can always delve into specific areas of interest once you have a clear goal in mind.

Answer 2

how to use SQL

Answer 3

pk but I don't now how its start

Answer 4

how I collect data