Safe SQL Habits and Preventing Dangerous Operations

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.

Before ...