What will happen if you try to insert a value 'excited' into a column of ENUM type mood defined as ('happy', 'sad', 'neutral')?

medium📝 query result Q5 of 15

PostgreSQL - Advanced Features

What will happen if you try to insert a value 'excited' into a column of ENUM type mood defined as ('happy', 'sad', 'neutral')?

AThe insert will fail with an error about invalid input value

BThe value 'excited' will be automatically added to the ENUM type

CThe value will be stored as NULL silently

DThe insert will succeed but convert 'excited' to 'neutral'

Step-by-Step Solution

Solution:

Step 1: Understand ENUM value restrictions
Only predefined ENUM values are allowed; others cause errors.
Step 2: Analyze insert behavior
Inserting 'excited' not in ENUM causes an error, no automatic addition or conversion.
Final Answer:
The insert will fail with an error about invalid input value -> Option A
Quick Check:
Invalid ENUM insert = error, no silent conversion [OK]

Quick Trick: ENUM columns reject values not in defined list [OK]

Common Mistakes:

Master "Advanced Features" in PostgreSQL

9 interactive learning modes - each teaches the same concept differently

Want More Practice?

15+ quiz questions · All difficulty levels · Free