每个表行数

SELECT 
    table_name AS `Table`, 
    table_rows AS `Rows`
FROM 
    information_schema.TABLES
WHERE 
    table_schema = '数据库名';

每个表大小

SELECT 
    table_name AS `Table`, 
    ROUND((data_length + index_length) / 1024 / 1024, 2) AS `Size in MB`
FROM 
    information_schema.TABLES
WHERE 
    table_schema = '数据库名';

数据库总行数

-- 总行数
SELECT SUM(table_rows) AS `Total Rows`
FROM information_schema.TABLES
WHERE table_schema = '数据库名';

数据库总大小

-- 总大小
SELECT 
    SUM(data_length + index_length) AS `Total Size in Bytes`,
    ROUND(SUM(data_length + index_length) / 1024 / 1024, 2) AS `Total Size in MB`
FROM information_schema.TABLES
WHERE table_schema = '数据库名';