May 2020
Beginner
564 pages
14h 9m
English
Content preview from Learn SQL Database Programming
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Differences between triggers in other RDBMSes
Each RDBMS and its differences are explained as follows:
- Oracle: Oracle has a similar syntax to MySQL for creating triggers. For more information about Oracle triggers, take a look at the Further reading section.
- PostgreSQL: In PostgreSQL, you need to create a function and a trigger function. The trigger function contains the logic for the trigger, and the trigger placed on the table calls the trigger function. For more information about PostgreSQL triggers, take a look at the Further reading section.
- SQL Server: In SQL Server, the syntax is different, and you can't do BEFORE triggers, only AFTER triggers. SQL Server creates two virtual tables to store the data before and after the changes. ...
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