Which statement about deadlocks is correct?

Problem Statement

Explanation

A deadlock is a cycle of waiting. Engines detect the cycle and abort one victim to break it. Your code should handle the error and retry safely. Prevent deadlocks by acquiring resources in a consistent order, keeping transactions short, and using selective indexes to lock fewer rows.

Code Solution

SolutionRead Only

BEGIN; -- T1 locks row A then tries B
-- T2 locks row B then tries A -> cycle

Practice Sets

This question appears in the following practice sets:

Transactions, Isolation & Concurrency Control

Next Question

Master Interviews
Anywhere, Anytime

Which statement about deadlocks is correct?

Problem Statement

Explanation

Code Solution

Practice Sets

Related Questions

Which SQL statement retrieves all columns and rows from a table named employees?

Which clause filters rows before aggregation and affects which rows are grouped?

What is the default sort order when ORDER BY is used without ASC or DESC?

Which construct is commonly used to paginate results in SQL engines like Postgres and MySQL?

Which predicate correctly checks for missing values in standard SQL?

More from SQL & Databases

Master Interviews Anywhere, Anytime

Which statement about deadlocks is correct?

Problem Statement

Explanation

Code Solution

Practice Sets

Related Questions

Which SQL statement retrieves all columns and rows from a table named employees?

Which clause filters rows before aggregation and affects which rows are grouped?

What is the default sort order when ORDER BY is used without ASC or DESC?

Which construct is commonly used to paginate results in SQL engines like Postgres and MySQL?

Which predicate correctly checks for missing values in standard SQL?

More from SQL & Databases

Master Interviews
Anywhere, Anytime