JSON_MERGE
Merge JSON documents. This function merges two or more JSON documents into a single JSON document, preserving all keys and values.
JSON_MERGE(json_doc, json_doc[, json_doc] ...)
Merges the given JSON documents.
Returns the merged result, or NULL if any argument is NULL.
An error occurs if any of the arguments are not valid JSON documents.
JSON_MERGE is deprecated. is an RFC 7396-compliant replacement, and is a synonym.
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