mysql命令

DDL-数据定义语言

Data Definition Language 数据定义语言

create

创建数据库及其对象（包括新建表、索引、视图、存储过程）

alter

改变现有数据库的结构（包括修改索引、修改字段类型、删除索引）

truncate

删除表中所有记录，并删除已分配的空间

comment

添加注释

rename

重命名（包括索引，表名）

DML-数据操作语言

Data Manipulation Language 数据操作语言

select

从数据库中检索数据

insert

新增数据到数据库中

update

更新表格中现有数据

delete

删除现有数据

explain

查看语句的执行计划

lock table

锁表操作

DCL-数据控制语言

Data Control Language 数据定义语言

grant

允许访问数据库的权限

desc mysql.user;
SELECT user,HOST from mysql.user;
show GRANTs for 'pingtai_grd'@'10.%.%.%' ;
GRANT select ON `sp-databus`.* TO 'pingtai_grd'@'10.%.%.%';

revoke

撤销访问数据库的权限

TCL-事务控制语言

Transaction Control Language 事务控制语言
TCL语句只有在DML语句上有效，在DDL语句上无效

commit

提交事务

rollback

回滚事务

set trasaction

设置事务隔离级别

other

show

root@((none))11:00:04>help mysql

Nothing found
Please try to run 'help contents' for a list of all accessible topics

root@((none))11:01:41>help show
Name: 'SHOW'
Description:
SHOW has many forms that provide information about databases, tables,
columns, or status information about the server. This section describes
those following:

SHOW {BINARY | MASTER} LOGS
SHOW BINLOG EVENTS [IN 'log_name'] [FROM pos] [LIMIT [offset,] row_count]
SHOW CHARACTER SET [like_or_where]
SHOW COLLATION [like_or_where]
SHOW [FULL] COLUMNS FROM tbl_name [FROM db_name] [like_or_where]
SHOW CREATE DATABASE db_name
SHOW CREATE EVENT event_name
SHOW CREATE FUNCTION func_name
SHOW CREATE PROCEDURE proc_name
SHOW CREATE TABLE tbl_name
SHOW CREATE TRIGGER trigger_name
SHOW CREATE VIEW view_name
SHOW DATABASES [like_or_where]
SHOW ENGINE engine_name {STATUS | MUTEX}
SHOW [STORAGE] ENGINES
SHOW ERRORS [LIMIT [offset,] row_count]
SHOW EVENTS
SHOW FUNCTION CODE func_name
SHOW FUNCTION STATUS [like_or_where]
SHOW GRANTS FOR user
SHOW INDEX FROM tbl_name [FROM db_name]
SHOW MASTER STATUS
SHOW OPEN TABLES [FROM db_name] [like_or_where]
SHOW PLUGINS
SHOW PROCEDURE CODE proc_name
SHOW PROCEDURE STATUS [like_or_where]
SHOW PRIVILEGES
SHOW [FULL] PROCESSLIST
SHOW PROFILE [types] [FOR QUERY n] [OFFSET n] [LIMIT n]
SHOW PROFILES
SHOW RELAYLOG EVENTS [IN 'log_name'] [FROM pos] [LIMIT [offset,] row_count]
SHOW SLAVE HOSTS
SHOW SLAVE STATUS [FOR CHANNEL channel]
SHOW [GLOBAL | SESSION] STATUS [like_or_where]
SHOW TABLE STATUS [FROM db_name] [like_or_where]
SHOW [FULL] TABLES [FROM db_name] [like_or_where]
SHOW TRIGGERS [FROM db_name] [like_or_where]
SHOW [GLOBAL | SESSION] VARIABLES [like_or_where]
SHOW WARNINGS [LIMIT [offset,] row_count]

like_or_where:
    LIKE 'pattern'
  | WHERE expr

If the syntax for a given SHOW statement includes a LIKE 'pattern'
part, 'pattern' is a string that can contain the SQL % and _ wildcard
characters. The pattern is useful for restricting statement output to
matching values.

Several SHOW statements also accept a WHERE clause that provides more
flexibility in specifying which rows to display. See
http://dev.mysql.com/doc/refman/5.7/en/extended-show.html.

URL: http://dev.mysql.com/doc/refman/5.7/en/show.html

show databases;
查看当前存在数据库