SELECT
*
FROM
(SELECT
table_name,
CONCAT(ROUND(SUM(data_length / 1024 / 1024), 2), 'MB') AS data_length_MB,
ROUND(SUM(data_length / 1024 / 1024), 2) data_length,
CONCAT(ROUND(SUM(index_length / 1024 / 1024), 2), 'MB') AS index_length_MB
FROM
information_schema.tables
WHERE
table_schema = 'mss'
GROUP BY table_name) t
ORDER BY data_length DESC
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