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You're reading from  Learn SQL Database Programming

Product typeBook
Published inMay 2020
Reading LevelIntermediate
PublisherPackt
ISBN-139781838984762
Edition1st Edition
Languages
SQL
Concepts
Database Programming
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Author (1)
Josephine Bush
Josephine Bush
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Josephine Bush

Josephine Bush has over 10 years experience as a Database Administrator. Her experience is extensive and broad-based, including in financial, business, and energy data systems using MySQL, SQL Server, Oracle, and PostgreSQL. She is a Microsoft Certified Solutions Expert: Data Management and Analytics. She holds a BS in Information Technology, an MBA in IT Management, and an MS in Data Analytics.
Read more about Josephine Bush

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Using query hints and transaction isolation levels

Query hints and isolation levels help you to have more control over how your query is executed by MySQL. Before we discuss these topics, let's go over what locking, blocking, and deadlocking mean.

Understand the concepts of locking, blocking, and deadlocking

Locking is what happens when a query runs against a database. There are read locks and write locks:

  • Read locks: Allow other queries reading data (SELECT) to read as well.
  • Write locks: Other queries can't read or write data until the write (INSERT, UPDATE, DELETE) query is complete.

Blocking can happen when one or more queries holds a lock on the same data. Deadlocking can happen when each query locks data...

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Learn SQL Database Programming
Published in: May 2020Publisher: PacktISBN-13: 9781838984762
© 2020 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Josephine Bush

Josephine Bush has over 10 years experience as a Database Administrator. Her experience is extensive and broad-based, including in financial, business, and energy data systems using MySQL, SQL Server, Oracle, and PostgreSQL. She is a Microsoft Certified Solutions Expert: Data Management and Analytics. She holds a BS in Information Technology, an MBA in IT Management, and an MS in Data Analytics.
Read more about Josephine Bush

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