Querying JSON data

Table myTable:
  id        INTEGER
  jsoncolumn    JSON 

Table data:
101,{"name":{"first":"daffy"\,"last":"duck"}\,"score":101\,"data":["a"\,"b"\,"c"\,"d"]}
102,{"name":{"first":"donald"\,"last":"duck"}\,"score":102\,"data":["a"\,"b"\,"e"\,"f"]}
103,{"name":{"first":"mickey"\,"last":"mouse"}\,"score":103\,"data":["a"\,"b"\,"g"\,"h"]}
104,{"name":{"first":"minnie"\,"last":"mouse"}\,"score":104\,"data":["a"\,"b"\,"i"\,"j"]}
105,{"name":{"first":"goofy"\,"last":"dwag"}\,"score":104\,"data":["a"\,"b"\,"i"\,"j"]}
106,{"person":{"name":"daffy duck"\,"companies":[{"name":"n1"\,"title":"t1"}\,{"name":"n2"\,"title":"t2"}]}}
107,{"person":{"name":"scrooge mcduck"\,"companies":[{"name":"n1"\,"title":"t1"}\,{"name":"n2"\,"title":"t2"}]}}

SELECT id, jsoncolumn 
  FROM myTable

SELECT id,
       json_extract_scalar(jsoncolumn, '$.name.last', 'STRING', 'null') last_name,
       json_extract_scalar(jsoncolumn, '$.name.first', 'STRING', 'null') first_name
       json_extract_scalar(jsoncolumn, '$.data[1]', 'STRING', 'null') value
  FROM myTable

SELECT id,
       json_extract_scalar(jsoncolumn, '$.name.last', 'STRING', 'null') last_name,
       json_extract_scalar(jsoncolumn, '$.name.first', 'STRING', 'null') first_name,
       json_extract_scalar(jsoncolumn, '$.data[1]', 'STRING', 'null') value
  FROM myTable
 WHERE JSON_MATCH(jsoncolumn, '"$.data[1]" IS NOT NULL')

  SELECT json_extract_scalar(jsoncolumn, '$.name.last', 'STRING', 'null') last_name,
         count(*)
    FROM myTable
   WHERE JSON_MATCH(jsoncolumn, '"$.data[1]" IS NOT NULL')
GROUP BY json_extract_scalar(jsoncolumn, '$.name.last', 'STRING', 'null')
ORDER BY 2 DESC

  SELECT json_extract_scalar(jsoncolumn, '$.name.last', 'STRING', 'null') last_name,
         sum(json_extract_scalar(jsoncolumn, '$.id', 'INT', 0)) total
    FROM myTable
   WHERE JSON_MATCH(jsoncolumn, '"$.name.last" IS NOT NULL')
GROUP BY json_extract_scalar(jsoncolumn, '$.name.last', 'STRING', 'null')