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MySQL 实用技巧

时间：2021-07-01 10:21:17 帮助过：2人阅读

Option	Description
`\C`	The current connection identifier (MySQL 5.7.6 and up)
`\c`	A counter that increments for each statement you issue
`\D`	The full current date
`\d`	The default database
`\h`	The server host
`\l`	The current delimiter
`\m`	Minutes of the current time
`\n`	A newline character
`\O`	The current month in three-letter format (Jan, Feb, …)
`\o`	The current month in numeric format
`\P`	am/pm
`\p`	The current TCP/IP port or socket file
`\R`	The current time, in 24-hour military time (0–23)
`\r`	The current time, standard 12-hour time (1–12)
`\S`	Semicolon
`\s`	Seconds of the current time
`\t`	A tab character
`\U`	Your full `user_name@host_name` account name
`\u`	Your user name
`\v`	The server version
`\w`	The current day of the week in three-letter format (Mon, Tue, …)
`\Y`	The current year, four digits
`\y`	The current year, two digits
`\_`	A space
`\`	A space (a space follows the backslash)
`\‘`	Single quote
`\"`	Double quote
`\\`	A literal “`\`” backslash character
`\x`	`x`, for any “`x`” not listed above


以下为配置示例：

1、在my.cnf配置文件[client]部分中增加以下配置
prompt="[\\r:\\m:\\s](\\U)[\\d] > "     -- 在配置文件中配置都需要用\对配置的参数进行转义

[root@manager ~]# mysql -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 15
Server version: 5.7.10-log MySQL Community Server (GPL)
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

[03:11:57](root@localhost)[(none)] >　　-- 显示时间 + 登录用户 + 当前使用的数据库(未使用则为none)
[03:15:40](root@localhost)[test] >

2、在mysql客户端内直接配置

mysql>prompt [\r:\m:\s](\U)[\d] >　　　　
PROMPT set to ‘[\r:\m:\s](\U)[\d] >‘
[03:22:31](root@localhost)[(none)] >   -- 显示时间 + 登录用户 + 当前使用的数据库

[03:22:31](root@localhost)[(none)] >prompt (\U)[\d] >
PROMPT set to ‘(\U)[\d] >‘
(root@localhost)[(none)] >             -- 只显示 登录用户 + 当前使用的数据库

二、tee/notee

功能：tee实现将命令行中的输入输出结果保存到文本文件中,使用该命令能方便的将命令进行日志记录。 
用法：tee /tmp/command.log

以下为使用示例：

[03:43:49](root@localhost)[(none)] > tee /tmp/command.log    -- 设置将输出的结果保存到文件中
Logging to file ‘/tmp/command.log‘
[03:44:02](root@localhost)[(none)] > show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| paralleldb         |
| performance_schema |
| web                |
+--------------------+
10 rows in set (0.00 sec)

[03:44:18](root@localhost)[(none)] > system cat /tmp/command.log    -- 通过system 命令查看系统文件内容与数据库中内容一致
[03:44:02](root@localhost)[(none)] > show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| paralleldb         |
| performance_schema |
| web                |
+--------------------+
10 rows in set (0.00 sec)

[03:46:55](root@localhost)[(none)] > notee -- 使用notee可结束文件的输出
Outfile disabled.

MySQL 实用技巧

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MySQL 实用技巧

二、tee/notee

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