Safe SQL Habits and Preventing Dangerous Operations
Explore essential safe SQL habits that prevent accidental data loss and errors. Learn to verify queries using SELECT before modifying data, utilize AI to review potential risks, and apply transactions for testing changes safely. This lesson helps you build confidence in data protection and responsible SQL use.
Step 1: The golden rule
When SQL modifies data, it doesn’t pause to ask, Are you sure? That responsibility is yours.
A single missing WHERE or typo in a condition can:
Delete every row in a table.
Update all salaries to the same number.
Break relationships between tables.
Let’s learn how to prevent that from happening.
Step 2: Think before you run
Let’s imagine this query:
What does it do? Right, it wipes out every record in the table. ...