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mysqlshow：數據庫對象查看工具，用來快速查找存在哪些數據庫、數據庫中的表、表中的列或索引。
選項：--count 顯示數據庫和表的統計信息
-k 顯示指定的表中的索引
-i 顯示表的狀態信息
不帶任何參數顯示所有數據庫
[root@www mysql-5.6.30]# mysqlshow
+--------------------+
| Databases |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
+--------------------+
不指定數據庫，顯示數據庫和表的統計信息
[root@www mysql-5.6.30]# mysqlshow --count
+--------------------+--------+--------------+
| Databases | Tables | Total Rows |
+--------------------+--------+--------------+
| information_schema | 59 | 13157 |
| mysql | 28 | 2474 |
| performance_schema | 52 | 16615 |
| test | 2 | 24 |
+--------------------+--------+--------------+
4 rows in set.
指定數據庫，顯示統計信息
[root@www mysql-5.6.30]# mysqlshow -uroot test --count
Database: test
+----------+----------+------------+
| Tables | Columns | Total Rows |
+----------+----------+------------+
| backt118 | 4 | 12 |
| t118 | 4 | 12 |
+----------+----------+------------+
2 rows in set.
指定數據庫和表，顯示統計信息
[root@www mysql-5.6.30]# mysqlshow -uroot test t118 --count
Database: test Table: t118 Rows: 12
+---------+----------+-----------------+------+-----+---------+-------+---------------------------------+---------+
| Field | Type | Collation | Null | Key | Default | Extra | Privileges | Comment |
+---------+----------+-----------------+------+-----+---------+-------+---------------------------------+---------+
| name | char(10) | utf8_general_ci | YES | MUL | | | select,insert,update,references | |
| age | int(3) | | YES | | | | select,insert,update,references | |
| chushen | date | | YES | | | | select,insert,update,references | |
| shengao | int(3) | | YES | | | | select,insert,update,references | |
+---------+----------+-----------------+------+-----+---------+-------+---------------------------------+---------+
顯示指定表所有的索引，前部分是表的結構，后部分是表的索引信息
[root@www mysql-5.6.30]# mysqlshow -uroot test t118 -k
Database: test Table: t118
+---------+----------+-----------------+------+-----+---------+-------+---------------------------------+---------+
| Field | Type | Collation | Null | Key | Default | Extra | Privileges | Comment |
+---------+----------+-----------------+------+-----+---------+-------+---------------------------------+---------+
| name | char(10) | utf8_general_ci | YES | MUL | | | select,insert,update,references | |
| age | int(3) | | YES | | | | select,insert,update,references | |
| chushen | date | | YES | | | | select,insert,update,references | |
| shengao | int(3) | | YES | | | | select,insert,update,references | |
+---------+----------+-----------------+------+-----+---------+-------+---------------------------------+---------+
+-------+------------+------------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
| Table | Non_unique | Key_name | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment |
+-------+------------+------------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
| t118 | 1 | index_name | 1 | name | A | 12 | | | YES | BTREE | | |
| t118 | 1 | index_ccc | 1 | name | A | 12 | | | YES | BTREE | | |
+-------+------------+------------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
顯示表的狀態信息
[root@www mysql-5.6.30]# mysqlshow -i -uroot test t118
Database: test Wildcard: t118
+------+--------+---------+------------+------+----------------+-------------+-----------------+--------------+-----------+----------------+---------------------+-------------+------------+-----------------+----------+----------------+---------+
| Name | Engine | Version | Row_format | Rows | Avg_row_length | Data_length | Max_data_length | Index_length | Data_free | Auto_increment | Create_time | Update_time | Check_time | Collation | Checksum | Create_options | Comment |
+------+--------+---------+------------+------+----------------+-------------+-----------------+--------------+-----------+----------------+---------------------+-------------+------------+-----------------+----------+----------------+---------+
| t118 | InnoDB | 10 | Compact | 12 | 1365 | 16384 | 0 | 0 | 0 | | 2017-04-29 22:33:47 | | | utf8_general_ci | | | |
+------+--------+---------+------------+------+----------------+-------------+-----------------+--------------+-----------+----------------+---------------------+-------------+------------+-----------------+----------+----------------+---------+
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