mysql客户端工具使用

mysqladmin是个客户端的管理工具，使用的方式如下：

shell> mysqladmin [options] command [command-arg] [command [command-arg]] ...




包含的命令如下：

create db_name  创建一个新的数据库

drop db_name删除数据库

extended-status 显示服务器状态变量及对应的值

flush-hosts 刷新机器缓存中的所有信息 相当于commit?

flush-logs 刷新日志 相当于fulsh logs生成一个新的log

flush-privileges 重新加载授权表

flush-status 清空状态变量

flush-tables刷新表  ？？

flush-threads 刷新线程缓存

kill id,id,....杀掉线程

ping 查看服务器是否可用

processlist 显示线程的列表，使用--verbose选项，输出就是show full processlist

reload 重载授权表

refresh 刷新所有的表并关闭在打开日志文件

shutdown 关闭服务器

start-slave 启动复制

status 显示状态信息

stop-slave停止复制

variables显示系统变量和值

version显示版本

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mysqlcheck这个客户端主要是检查，修复，优化，分析表。

当使用该工具的时候，表被锁住不可用，对于检查操作，加的事读锁。mysql_upgrade命令也是调用了mysqlcheck，也会锁表。

mysqlcheck跟myisamchk很像，但是不同，mysqlcheck主要是mysqld运行的时候使用，myisamchk是在不运行的时候使用，使用mysqlcheck不需要停止服务。

mysqlcheck使用sql语句check table,repaire table analyze table 和optimize table,它决定使用哪个语句来操作，mysqlcheck也可以用在在myisam表上。

使用方法

shell> mysqlcheck [options] db_name [tbl_name ...]
shell> mysqlcheck [options] --databases db_name ...
shell> mysqlcheck [options] --all-databases

下面是指定的选项，主要的也就是check,repaire,analyze

Format	Description	Introduced
--all-databases	Check all tables in all databases
--all-in-1	Execute a single statement for each database that names all the tables from that database
--analyze	Analyze the tables
--auto-repair	If a checked table is corrupted, automatically fix it
--bind-address	Use specified network interface to connect to MySQL Server	5.6.1
--character-sets-dir	Directory where character sets are installed
--check	Check the tables for errors
--check-only-changed	Check only tables that have changed since the last check
--check-upgrade	Invoke CHECK TABLE with the FOR UPGRADE option
--compress	Compress all information sent between client and server
--databases	Interpret all arguments as database names
--debug	Write debugging log
--debug-check	Print debugging information when program exits
--debug-info	Print debugging information, memory, and CPU statistics when program exits
--default-auth	Authentication plugin to use	5.6.2
--default-character-set	Specify default character set
--defaults-extra-file	Read named option file in addition to usual option files
--defaults-file	Read only named option file
--defaults-group-suffix	Option group suffix value
--enable-cleartext-plugin	Enable cleartext authentication plugin	5.6.28
--extended	Check and repair tables
--fast	Check only tables that have not been closed properly
--fix-db-names	Convert database names to 5.1 format
--fix-table-names	Convert table names to 5.1 format
--force	Continue even if an SQL error occurs
--help	Display help message and exit
--host	Connect to MySQL server on given host
--login-path	Read login path options from .mylogin.cnf	5.6.6
--medium-check	Do a check that is faster than an --extended operation
--no-defaults	Read no option files
--optimize	Optimize the tables
--password	Password to use when connecting to server
--pipe	On Windows, connect to server using named pipe
--plugin-dir	Directory where plugins are installed	5.6.2
--port	TCP/IP port number to use for connection
--print-defaults	Print default options
--protocol	Connection protocol to use
--quick	The fastest method of checking
--repair	Perform a repair that can fix almost anything except unique keys that are not unique
--secure-auth	Do not send passwords to server in old (pre-4.1) format	5.6.17
--shared-memory-base-name	The name of shared memory to use for shared-memory connections
--silent	Silent mode
--skip-database	Omit this database from performed operations	5.6.11
--socket	For connections to localhost, the Unix socket file to use
--ssl	Enable secure connection
--ssl-ca	Path of file that contains list of trusted SSL CAs
--ssl-capath	Path of directory that contains trusted SSL CA certificates in PEM format
--ssl-cert	Path of file that contains X509 certificate in PEM format
--ssl-cipher	List of permitted ciphers to use for connection encryption
--ssl-crl	Path of file that contains certificate revocation lists	5.6.3
--ssl-crlpath	Path of directory that contains certificate revocation list files	5.6.3
--ssl-key	Path of file that contains X509 key in PEM format
--ssl-verify-server-cert	Verify server certificate Common Name value against host name used when connecting to server
--tables	Overrides the --databases or -B option
--use-frm	For repair operations on MyISAM tables
--user	MySQL user name to use when connecting to server
--verbose	Verbose mode
--version	Display version information and exit
--write-binlog	Log ANALYZE, OPTIMIZE, REPAIR statements to binary log. --skip-write-binlog adds NO_WRITE_TO_BINLOG to these statements.

不知道这个分析都做了什么动作，分析些什么内容

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mysqlshow显示表的信息

 mysqlshow -h XXXX -P3307 test --status -t  下面是显示数据库中包含一个特定列的所有表信息的shell

#!/bin/sh
#This scripts returns all the tables in a database that contains some field

function usage
{
echo "Usage: $0 USER DB COLUMN"
}

function ExistsColumn
{
local USER=$1
local DB=$2
local TABLE=$3
local COLUMN=$4

SEARCH_RESULT=$(mysqlshow -u ${USER} ${DB} ${TABLE} ${COLUMN} | awk '{ if ( NR == 5) print $2 }')
if [ "${COLUMN}" = "${SEARCH_RESULT}" ];
then
echo "true";
else
echo "false";
fi
}

function main
{
local USER=$1
local DB=$2
local COLUMN=$3

if [[ "${USER}" = "" || "${DB}" = "" || "${COLUMN}" = "" ]];
then
usage
exit 1
fi

all_tables=$(mysqlshow -u ${USER} ${DB} | \
awk '{ if (NR >4 ) print $_}' | \
sed -e 's/[|+-]//g; /^$/d ' | \
xargs )
for TABLE in ${all_tables}; do
if [ "true" = "$(ExistsColumn $USER $DB $TABLE $COLUMN)" ];
then
echo $TABLE
fi
done

}

main $*