SHOW TABLE STATUS FROM {DB_NAME} LIKE '{TABLE_NAME}';

1. Create_options에 있는 max_rows와 avg_row_length를 곱한 값 용량
2. 1024로 두번 나누면 MB 로 계산

SELECT count(*) NUM_OF_TABLE,
  table_schema,concat(round(sum(table_rows)/1000000,2),'M') rows,
  concat(round(sum(data_length)/(1024*1024*1024),2),'G') DATA,
  concat(round(sum(index_length)/(1024*1024*1024),2),'G') idx,
  concat(round(sum(data_length+index_length)/(1024*1024*1024),2),'G') total_size,
  round(sum(index_length)/sum(data_length),2) idxfrac
FROM information_schema.TABLES
GROUP BY table_schema
ORDER BY sum(data_length+index_length) DESC;

SELECT table_name,
  table_rows,
  round(data_length/(1024*1024),2) as 'DATA_SIZE(MB)',
  round(index_length/(1024*1024),2) as 'INDEX_SIZE(MB)'
FROM information_schema.TABLES 
WHERE table_schema = '{DB_NAME}'
GROUP BY table_name 
ORDER BY data_length DESC;