SQL - Security Basics
You want to safely query users by either username or email using parameter binding. Which query correctly uses parameter binding for both filters?
You want to safely query users by either username or email using parameter binding. Which query correctly uses parameter binding for both filters?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand parameter binding for multiple values
Each parameter must have a unique name or position to bind different values.Step 2: Analyze options
SELECT * FROM users WHERE username = :username OR email = :email uses two named parameters :username and :email correctly for separate values.Final Answer:
SELECT * FROM users WHERE username = :username OR email = :email -> Option AQuick Check:
Unique parameters for multiple values = SELECT * FROM users WHERE username = :username OR email = :email [OK]
Quick Trick: Use distinct parameter names for different values [OK]
Common Mistakes:
- Using same parameter name for different values
- Using invalid syntax like ?input
- Mixing positional and named parameters
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