Interview Q&A / SQL & DBMS
SQL & DBMS interview questions
Joins, keys, normalisation, indexes and transactions for placement and backend interviews.
Prefer rapid revision? Practise SQL & DBMS short interview answers →
- What is the difference between LEFT JOIN and RIGHT JOIN?
LEFT JOIN keeps every row of the left table and fills NULLs where the right has no match. RIGHT JOIN does the opposite. They are mirror images, and any RIGHT JOIN can be rewritten as a LEFT JOIN by swapping the tables.
BeginnerQuick answer1 min read