columns_priv
列的權限信息
GRANT SELECT (col1), INSERT (col1,col2),UPDATE(col1, col2, col3), DELETE(col1,col2) ON mytest.test01 TO 'mytest'@'%';
component
服務器組件的註冊表。 此表中列出的任何組件都由加載程序服務在服務器啓動過程中安裝。
db
系統DB信息（information_schema, sys）
default_roles
連接之後的默認role
engine_cost
contains estimates for operations specific to particular storage engines.
+-------------+-------------+------------------------+------------+---------------------+---------+---------------+
| engine_name | device_type | cost_name | cost_value | last_update | comment | default_value |
+-------------+-------------+------------------------+------------+---------------------+---------+---------------+
| default | 0 | io_block_read_cost | NULL | 2018-02-26 03:49:00 | NULL | 1 |
| default | 0 | memory_block_read_cost | NULL | 2018-02-26 03:49:00 | NULL | 0.25 |
+-------------+-------------+------------------------+------------+---------------------+---------+---------------+
2 rows in set (0.00 sec)
func
有關用戶定義函數（UDF）的信息。
general_log
The general query log table.
global_grants
爲用戶分配動態全局特權
gtid_executed
storing GTID values
help_category
Information about help categories.
help_keyword
Keywords associated with help topics.
help_relation
Mappings between help keywords and topics.
help_topic
Help topic contents.
innodb_ddl_log
Stores DDL logs for crash-safe DDL operations.
innodb_dynamic_metadata
由InnoDB存儲引擎用於存儲快速更改的表元數據，例如自動遞增計數器值和索引樹損壞標誌。 替換駐留在InnoDB系統表空間中的數據字典緩衝區表。
innodb_index_stats
innodb優化器統計信息。
innodb_table_stats
innodb優化器統計信息。
password_history
Information about password changes.
plugin
Information about server-side plugins
procs_priv
Stored procedure and function privileges.
proxies_priv
Proxy-user privileges.
role_edges
角色子圖
server_cost
+------------------------------+------------+---------------------+---------+---------------+
| cost_name | cost_value | last_update | comment | default_value |
+------------------------------+------------+---------------------+---------+---------------+
| disk_temptable_create_cost | NULL | 2018-02-26 03:49:00 | NULL | 20 |
| disk_temptable_row_cost | NULL | 2018-02-26 03:49:00 | NULL | 0.5 |
| key_compare_cost | NULL | 2018-02-26 03:49:00 | NULL | 0.05 |
| memory_temptable_create_cost | NULL | 2018-02-26 03:49:00 | NULL | 1 |
| memory_temptable_row_cost | NULL | 2018-02-26 03:49:00 | NULL | 0.1 |
| row_evaluate_cost | NULL | 2018-02-26 03:49:00 | NULL | 0.1 |
+------------------------------+------------+---------------------+---------+---------------+
servers
Used by the FEDERATED storage engine.
slave_master_info
Used to store replication information on slave servers.
slave_relay_log_info
Used to store replication information on slave servers.
slave_worker_info
Used to store replication information on slave servers.
slow_log
The slow query log table.
tables_priv
表的權限信息
GRANT SELECT,UPDATE,DELETE,INSERT ON mytest.test01 to 'mytest'@'%';
time_zone
時區ID以及它們是否使用閏秒。
time_zone_leap_second
When leap seconds occur.
time_zone_name
Mappings between time zone IDs and names.
time_zone_transition
Time zone descriptions.
time_zone_transition_type
Time zone descriptions.
user
User accounts, global privileges, and other nonprivilege columns.