Mysql查询库及表容量

-- 查询所有数据库容量    
SELECT
    table_schema AS '数据库',
    sum( table_rows ) AS '记录数',
    sum( TRUNCATE ( data_length / 1024 / 1024, 2 ) ) AS '数据容量(MB)',
    sum( TRUNCATE ( index_length / 1024 / 1024, 2 ) ) AS '索引容量(MB)' 
FROM
    information_schema.TABLES 
GROUP BY
    table_schema 
ORDER BY
    sum( data_length ) DESC,
    sum( index_length ) DESC;
    
-- 查询所有数据库各表容量
SELECT
    table_schema AS '数据库',
    table_name AS '表名',
    table_rows AS '记录数',
    TRUNCATE ( data_length / 1024 / 1024, 2 ) AS '数据容量(MB)',
    TRUNCATE ( index_length / 1024 / 1024, 2 ) AS '索引容量(MB)' 
FROM
    information_schema.TABLES 
ORDER BY
    data_length DESC,
    index_length DESC;
    
-- 查询指定库容量
SELECT
    table_schema AS '数据库',
    sum( table_rows ) AS '记录数',
    sum( TRUNCATE ( data_length / 1024 / 1024, 2 ) ) AS '数据容量(MB)',
    sum( TRUNCATE ( index_length / 1024 / 1024, 2 ) ) AS '索引容量(MB)' 
FROM
    information_schema.TABLES 
WHERE
    table_schema = 'db_name';
    
-- 查询指定库各表容量
SELECT
    table_schema AS '数据库',
    table_name AS '表名',
    table_rows AS '记录数',
    TRUNCATE ( data_length / 1024 / 1024, 2 ) AS '数据容量(MB)',
    TRUNCATE ( index_length / 1024 / 1024, 2 ) AS '索引容量(MB)' 
FROM
    information_schema.TABLES 
WHERE
    table_schema = 'db_name' 
ORDER BY
    data_length DESC,
    index_length DESC;