查询所有表的修改时间
select create_time as create_time,update_time as update_time,table_name as table_name from information_schema.`TABLES` where table_schema=database() ORDER BY update_time desc;
查询指定表
select * from information_schema.`TABLES` where table_schema='databaseName' and table_name='tableName';
databaseName : 数据库名称
tableName :指定表名