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 are dirty reads, non-repeatable reads and phantom reads?
A dirty read sees another transaction's uncommitted data. A non-repeatable read gets a different value for the same row on a second read. A phantom read gets a different set of rows for the same query.
IntermediateQuick answer1 min read