For example, to delete rows that exist in t1 that have no match in t2, use a LEFT JOIN:
DELETE t1 FROM t1 LEFT JOIN t2 ON t1.id=t2.id WHERE t2.id IS NULL;
Database locking is a varied, evolving, complicated, and technical topic. This paper sheds light on the nature of database locking and how it varies between different platforms. It also discuss the types of application issues that can arise related as a result. It then looks at ways to ferret out these issues and to resolve them before they sneak out the door with your finished product. Armed with this understanding of the enemy and how it relates to your application, you�ll be much better able to avoid disaster.
This article is part of a series. You do not have to read them in order but I will be referring to topics and explanations in previous articles: Implementing Your Own Transactions with MVCCSQL Transaction Isolation Levels ExplainedImplementing Repeatable ...
The Online Research Database Service (ORDS) is an online tool for researchers working with relational databases. It offers secure database hosting, sharing, and editing interfaces so that you can work together with colleagues and collaborators to query your data and publish your research.
SEAD is an NSF-sponsored project to create data services designed to meet the needs of sustainability science research. Sustainability science requires reliable cyberinfrastructure and an enhanced ability to manage, integrate, interpret, share, curate, and preserve data across a broad range of physical and social science disciplines.
Apache Sqoop(TM) is a tool designed for efficiently transferring bulk data between Apache Hadoop and structured datastores such as relational databases.
Written 100% in JavaScript to run in any Web Browser and on any Platform. It parses and executes SQL dynamically in the browser, returning results formatted for RIA Frameworks or directly for inserting into HTML.
DbVisualizer offers features for database developers, analysts and DBAs. Read more about Database Object Management, SQL Script Management, Query Builder and more.
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