JSON_SET
Description
The JSON_REMOVE function is used to remove data from a JSON document and return the result.
Syntax
JSON_REMOVE (<json_object>, path[, path] ...)
Parameters
<json_object>JSON type expression, the target to be deleted.<path>String type expression, path parameters are evaluated in left-to-right order. The JSON document produced by evaluating a path becomes the new value for the next path evaluation.
Return Value
Nullable(JSON)returns the JSON object after deletion.
Examples
- Path does not exist
SELECT JSON_REMOVE('{"a": 1, "b": 2, "c": 3}', '$.d');
+------------------------------------------------+
| JSON_REMOVE('{"a": 1, "b": 2, "c": 3}', '$.d') |
+------------------------------------------------+
| {"a":1,"b":2,"c":3} |
+------------------------------------------------+
- Remove the value pointed to by
<path>from the JSON object
SELECT JSON_REMOVE('{"Name": "Jack", "Gender": "Male", "Age": 20}', '$.Age');
+-----------------------------------------------------------------------+
| JSON_REMOVE('{"Name": "Jack", "Gender": "Male", "Age": 20}', '$.Age') |
+-----------------------------------------------------------------------+
| {"Name":"Jack","Gender":"Male"} |
+-----------------------------------------------------------------------+
- Specify multiple paths to delete data from multiple locations in a JSON object
SELECT JSON_REMOVE('[1, 2, 3, 4, 5]', '$[3]'), JSON_REMOVE('[1, 2, 3, 4, 5]', '$[1]', '$[3]');
+----------------------------------------+------------------------------------------------+
| JSON_REMOVE('[1, 2, 3, 4, 5]', '$[3]') | JSON_REMOVE('[1, 2, 3, 4, 5]', '$[1]', '$[3]') |
+----------------------------------------+------------------------------------------------+
| [1,2,3,5] | [1,3,4] |
+----------------------------------------+------------------------------------------------+
- Larger JSON object
SELECT JSON_REMOVE('{"Person": {"Name": "Jack","Age": 20,"Hobbies": ["Eating", "Sleeping", "Base Jumping"]}}', '$.Person.Age', '$.Person.Hobbies[2]');
+------------------------------------------------------------------------------------------------------------------------------------------------+
| JSON_REMOVE('{"Person": {"Name": "Jack","Age": 20,"Hobbies": ["Eating", "Sleeping", "Base Jumping"]}}', '$.Person.Age', '$.Person.Hobbies[2]') |
+------------------------------------------------------------------------------------------------------------------------------------------------+
| {"Person":{"Name":"Jack","Hobbies":["Eating","Sleeping"]}} |
+------------------------------------------------------------------------------------------------------------------------------------------------+
