You have a jsonb column with nested objects. You want to update a nested key without rewriting the entire JSON. Which function helps achieve this efficiently?

hard📝 Application Q9 of 15

PostgreSQL - JSON and JSONB

You have a jsonb column with nested objects. You want to update a nested key without rewriting the entire JSON. Which function helps achieve this efficiently?

Ajsonb_array_elements()

Bjsonb_set()

Cto_jsonb()

Djsonb_build_object()

Step-by-Step Solution

Solution:

Step 1: Identify function for updating nested JSON keys
jsonb_set() updates a value at a specified path inside a jsonb object.
Step 2: Compare with other functions
jsonb_array_elements() expands arrays, to_jsonb() converts data, and jsonb_build_object() builds new JSON objects, but none update nested keys efficiently.
Final Answer:
jsonb_set() -> Option B
Quick Check:
Update nested key function = A [OK]

Quick Trick: Use jsonb_set() to update nested JSON keys efficiently [OK]

Common Mistakes:

Using array functions to update objects
Rebuilding entire JSON instead of partial update
Confusing conversion functions with update functions

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You have a jsonb column with nested objects. You want to update a nested key without rewriting the entire JSON. Which function helps achieve this efficiently?

Step 1: Identify function for updating nested JSON keys

Step 2: Compare with other functions

Final Answer:

Quick Check:

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