Interview Q&A / SQL & DBMS
SQL & DBMS interview questions
Joins, keys, normalisation, indexes and transactions for placement and backend interviews.
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- What is a NATURAL JOIN and why do many developers avoid it?
NATURAL JOIN automatically joins on all columns with the same name in both tables. It is risky because adding or renaming a column silently changes the join. Explicit ON or USING is safer.
IntermediateQuick answer1 min read