【查阅】mysql系统视图查看

【1】查看表大小

SELECT
    CONCAT(table_schema,'.',table_name) AS 'Table Name',
    table_rows AS 'Number of Rows',
    CONCAT(ROUND(data_length/(1024*1024),3),' MB') AS 'Data Size',
    CONCAT(ROUND(index_length/(1024*1024),3),' MB') AS 'Index Size',
    CONCAT(ROUND((data_length+index_length)/(1024*1024),3),' MB') AS 'Total Size'
FROM
    information_schema.TABLES
WHERE
    table_schema = 'test' AND table_name in ('test101','test102');