Automating Database Logic with Triggers + Cursors in Oracle SQL

Randhir Gupta — Wed, 08 Oct 2025 09:40:47 +0000

Oracle SQL is more than just storing and retrieving data — it can react automatically to changes and process multiple rows efficiently.

In this tutorial, we’ll explore how to automate database logic using:
Triggers – to automatically log or react to changes in a table
Cursors – to process rows one by one in PL/SQL

Step 1: Create Tables
We’ll start with two tables: one for workers, and one for salary change logs.
Step 2: Insert Sample Data
Step 3: Create a Trigger
Step 4: Test the Trigger
Step 5: Use a Cursor to Loop Through Wor

Step 6: Key Takeaways

Triggers can automatically enforce rules or log changes without application code
Cursors allow row-by-row processing for complex logic in PL/SQL
Combining triggers + cursors helps automate workflows like audits, notifications, and reports
Thanks to @santhoshnc for his guidance and support

DEV Community: Randhir Gupta

Automating Database Logic with Triggers + Cursors in Oracle SQL