1、查询某张表的大小
mysql > select concat(round(sum(DATA_LENGTH/1024/1024),2),'M') from information_schema.tables where table_schema='test' AND table_name='t9';
2、查看某个数据库表的数据
[root@tst-yangsq2-2 ~]# mysqlshow -uroot -p --count test Enter password: Database: test +--------+----------+------------+ | Tables | Columns | Total Rows | +--------+----------+------------+ | t1 | 1 | 2 | | t2 | 1 | 2 | | t3 | 2 | 1 | | t4 | 1 | 6 | | t5 | 1 | 1 | | t6 | 1 | 14 | | t7 | 1 | 0 | | t8 | 1 | 12 | | t9 | 7 | 48147 | +--------+----------+------------+
3、查询某个数据库某张表的数据 #类似于desc
[root@tst-yangsq2-2 ~]# mysqlshow -uroot -p --count test t9 Enter password: Database: test Table: t9 Rows: 48147 +--------------+----------------------+-----------+------+-----+-------------------+-----------------------------+---------------------------------+---------+ | Field | Type | Collation | Null | Key | Default | Extra | Privileges | Comment | +--------------+----------------------+-----------+------+-----+-------------------+-----------------------------+---------------------------------+---------+ | payment_id | smallint(5) unsigned | | NO | | | | select,insert,update,references | | | customer_id | smallint(5) unsigned | | NO | MUL | | | select,insert,update,references | | | staff_id | tinyint(3) unsigned | | NO | MUL | | | select,insert,update,references | | | rental_id | int(11) | | YES | MUL | | | select,insert,update,references | | | amount | decimal(5,2) | | NO | | | | select,insert,update,references | | | payment_date | datetime | | NO | | | | select,insert,update,references | | | last_update | timestamp | | YES | | CURRENT_TIMESTAMP | on update CURRENT_TIMESTAMP | select,insert,update,references | | +--------------+----------------------+-----------+------+-----+-------------------+-----------------------------+---------------------------------+---------+