Join
Join is a database operation that combines rows from two or more tables into a single table based on a related column between them. In data science, joining is a common technique used to combine data from multiple sources to create a unified dataset for analysis. Joining can be performed using different types of joins such as inner join, left join, right join, and full outer join. Inner join returns only the matching rows from both tables, left join returns all the rows from the left table and matching rows from the right table, right join returns all the rows from the right table and matching rows from the left table, and full outer join returns all the rows from both tables. Joining can be done using SQL queries or using programming languages such as Python and R.
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