Mysql Json Development Tutorials, Guides & Insights

UPDATE users
SET preferences = JSON_MERGE(preferences, '{"layout": "grid"}')
WHERE name = 'John Doe';

You can check if a specific key exists in a JSON document using the JSON_CONTAINS_PATH function.

• JSON_EXTRACT(order_details, '$.quantity'): Extracts the value of the quantity key from the JSON order_details column.
• JSON_UNQUOTE(...): Removes any quotes from the extracted JSON value.
• CAST(... AS UNSIGNED): Converts the extracted value to an unsigned integer to allow for summation.
• SUM(...): Sums all the quantities across the rows.

When you run the above query, MySQL will return the total quantity of products ordered by all customers: