Triggers automate actions based on database events from "summary" of SQL and Relational Theory by C. Date
Triggers are a key feature of SQL - a way to automate actions based on database events. The basic idea is that you can define a trigger on a table, specifying that certain actions should be taken whenever a specified event occurs on that table. For example, you might define a trigger that says, "whenever a row is inserted into this table, also insert a corresponding row into that table over there." Or you might define a trigger that says, "whenever a row is deleted from this table, also delet...
Similar Posts
Code optimization is a key consideration for performance
Code optimization is a key consideration for performance. When we write a program, it is essential to ensure that it runs effic...
Embrace innovation and change to stay ahead
To succeed in today's fast-paced and ever-evolving business world, it is essential to embrace innovation and change. This means...
Functional groups determine the properties of organic molecules
Functional groups play a crucial role in determining the properties of organic molecules. These groups consist of specific arra...
Anomaly detection identifies rare instances in data
Anomaly detection is a crucial task in machine learning that involves identifying rare instances in a dataset. These rare insta...
Environmental economics considers the impact of human activity on the environment
Environmental economics delves into the relationship between human behavior and its consequences on the natural world. It explo...
Accept differences in others
We are all unique individuals with our own beliefs, values, preferences, and ways of being in the world. It is inevitable that ...
Establish user habits early in product usage
Establishing user habits early in the product usage is crucial for creating long-term engagement. By getting users to form habi...
Data science is essential for making informed business decisions
Data science plays a crucial role in helping businesses make informed decisions. By analyzing data, businesses can gain valuabl...
Build content that evokes emotion
People often think that if they want their ideas to catch on, they need to make them as practical and useful as possible. While...
Show, don't tell
The concept of "Show, don't tell" is a fundamental principle of effective fiction writing. Instead of simply telling the reader...