SELECT   @mb := round((sum(DATA_LENGTH) + sum(INDEX_LENGTH)) / (1024 * 1024), 2),   concat(@mb, 'MB') FROM information_schema.tables WHERE table_schema = 'sotu';
SELECT
  @mb := round((sum(DATA_LENGTH) + sum(INDEX_LENGTH)) / (1024 * 1024), 2),
  concat(@mb, 'MB')
FROM information_schema.tables
WHERE table_schema = 'sotu';

EasySpringBoot/picture-crawler,EasySpringBoot/picture-crawler