MySQL查詢數據庫表空間大小

一、查詢所有數據庫占用空間大小

SELECT
  TABLE_SCHEMA,
  CONCAT(
    TRUNCATE(SUM(data_length) / 1024 / 1024, 2),
    ' MB'
  ) AS data_size,
  CONCAT(
    TRUNCATE(SUM(index_length) / 1024 / 1024, 2),
    'MB'
  ) AS index_size
FROM
  information_schema.tables
GROUP BY TABLE_SCHEMA
ORDER BY data_length DESC;

二、查詢對應數據庫表占用空間大小

SELECT
  TABLE_NAME,
  CONCAT(
    TRUNCATE(data_length / 1024 / 1024, 2),
    ' MB'
  ) AS data_size,
  CONCAT(
    TRUNCATE(index_length / 1024 / 1024, 2),
    ' MB'
  ) AS index_size
FROM
  information_schema.tables
WHERE TABLE_SCHEMA = '數據庫名字'
GROUP BY TABLE_NAME
ORDER BY data_length DESC;

三、查詢某個數據庫對應表占用空間大小

SELECT
  CONCAT(
    ROUND(SUM(DATA_LENGTH / 1024 / 1024), 2),
    'MB'
  ) AS DATA
FROM
  TABLES
WHERE table_schema = '數據庫名字'
  AND table_name = '表名字';