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Selecting the Sum of a JSON Property in MySQL

Tutorial August 17, 2024
json mysql 

SELECT SUM(CAST(JSON_UNQUOTE(JSON_EXTRACT(order_details, '$.quantity')) AS UNSIGNED)) AS total_quantity
FROM orders;
  • JSON_EXTRACT(order_details, '$.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.

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