👉 Joins computing is a fundamental operation in relational databases that combines rows from two or more tables based on a related column between them. When performing a join, the database engine matches rows from each table where the specified column(s) have matching values, creating a new set of columns that include the data from both tables. There are several types of joins, including inner joins (which return only matching rows), left joins (which include all rows from the left table and matched rows from the right table), right joins (which include all rows from the right table and matched rows from the left table), and full outer joins (which return all rows from both tables, filling in NULLs where there are no matches). This process enables efficient data retrieval and analysis by allowing users to combine disparate datasets into a coherent, unified view.
