What is optimistic locking and how is it typically implemented in SQL? Advanced SQL DeveloperHard Try Now
What is a deadlock and how does a database engine typically resolve it? Advanced SQL DeveloperHard Try Now
What is the effect of adding INCLUDE columns to a non-clustered index in SQL Server or PostgreSQL? Advanced SQL DeveloperHard Try Now
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What is the purpose of the WINDOW clause in SQL (available in PostgreSQL and others)? Advanced SQL DeveloperHard Try Now
What is an autonomous transaction and which databases natively support it? Advanced SQL DeveloperHard Try Now
In SQL Server, what is the difference between DELETE and TRUNCATE with respect to transaction logging? Advanced SQL DeveloperHard Try Now
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What does the RETURNING clause do in PostgreSQL INSERT, UPDATE, or DELETE statements? Advanced SQL DeveloperHard Try Now
What is transaction ID wraparound in PostgreSQL and how is it prevented? Advanced SQL DeveloperHard Try Now
In PostgreSQL, what does VACUUM ANALYZE do and why is it necessary? Advanced SQL DeveloperHard Try Now
What is the purpose of the WITH (NOEXPAND) hint in SQL Server when querying an indexed view? Advanced SQL DeveloperHard Try Now
