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MariaDB starting with 10.5.0

JSON_OBJECTAGG was added in MariaDB 10.5.0.


JSON_OBJECTAGG(key, value)


JSON_OBJECTAGG returns a JSON object containing key-value pairs. It takes two expressions that evaluate to a single value, or two column names, as arguments, the first used as a key, and the second as a value.

Returns NULL in the case of an error, or if the result contains no rows.

JSON_OBJECTAGG cannot currently be used as a window function.




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