How Do You Update Nested Jsonb Fields in Postgresql Using Sql?

Handling JSON data is a common requirement in modern applications, and PostgreSQL’s jsonb data type offers robust capabilities for storing and manipulating JSON data. Sometimes you may need to update nested fields within a jsonb column. Here’s how you can efficiently update these nested JSONB fields using SQL.

Updating Nested JSONB Fields

Updating a nested JSONB field requires using the jsonb_set function, which lets you modify existing JSON data. The jsonb_set function takes three essential parameters:

1. The original JSONB data.
2. A path (array) specifying the location of the field to update.
3. The new value to be set.

UPDATE your_table
SET jsonb_column = jsonb_set(
  jsonb_column, 
  '{parent_key, nested_key}', 
  '"new_value"', 
  true
)
WHERE condition;

Step-by-Step Example

Suppose you have a table contacts with a jsonb column named info, and you want to update the city of a specific contact:

Current JSONB Value:

{
  "name": "John Doe",
  "address": {
    "city": "Old City",
    "state": "State"
  }
}

SQL Update Statement:

UPDATE contacts
SET info = jsonb_set(
  info::jsonb, 
  '{address, city}', 
  '"New City"', 
  true
)
WHERE info ->> 'name' = 'John Doe';

This query updates the city field inside the address object for the contact named “John Doe.”

Further Reading

• Learn how to order by a key inside a JSONB column to sort data efficiently.
• Discover methods to export JSONB columns in PostgreSQL for data sharing or analysis.
• Understand how to query JSONB data to filter and access your nested data.
• Explore how you can update JSONB fields in PostgreSQL to keep your data current.
• Find out more about updating JSONB data type columns for complex JSON structures.

By utilizing jsonb_set, updating nested JSONB fields becomes a powerful tool in PostgreSQL, enabling seamless data manipulation within your database. “`

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