Usage: mysql [OPTIONS] [database]   //命令方式
 -?, --help          //顯示幫助資訊並退出
 -I, --help          //顯示幫助資訊並退出
 --auto-rehash       //自動補全功能，就像linux裡面，按Tab鍵出提示差不多，下面有例子

 -A, --no-auto-rehash  //預設狀態是沒有自動補全功能的。-A就是不要自動補全功能
 -B, --batch         //ysql不使用歷史檔案，禁用互動
 (Enables --silent)
 --character-sets-dir=name   //字型集的安裝目錄                    
 --default-character-set=name    //設定資料庫的預設字符集
 -C, --compress      //在客戶端和伺服器端傳遞資訊時使用壓縮
 -#, --debug[=#]     //bug呼叫功能
 -D, --database=name //使用哪個資料庫
 --delimiter=name    //mysql預設命令結束符是分號，下面有例子
 -e, --execute=name  //執行mysql的sql語句
 -E, --vertical      //垂直列印查詢輸出
 -f, --force         //如果有錯誤跳過去，繼續執行下面的
 -G, --named-commands
 /*Enable named commands. Named commands mean this program's
 internal commands; see mysql> help . When enabled, the
 named commands can be used from any line of the query,
 otherwise only from the first line, before an enter.
 Disable with --disable-named-commands. This option is
 disabled by default.*/
 -g, --no-named-commands
 /*Named commands are disabled. Use \* form only, or use
 named commands only in the beginning of a line ending
 with a semicolon (;) Since version 10.9 the client now
 starts with this option ENABLED by default! Disable with
 '-G'. Long format commands still work from the first
 line. WARNING: option deprecated; use
 --disable-named-commands instead.*/
 -i, --ignore-spaces //忽視函式名後面的空格.
 --local-infile      //啟動/禁用 LOAD DATA LOCAL INFILE.
 -b, --no-beep       //sql錯誤時，禁止嘟的一聲
 -h, --host=name     //設定連線的伺服器名或者Ip
 -H, --html          //以html的方式輸出
 -X, --xml           //以xml的方式輸出
 --line-numbers      //顯示錯誤的行號
 -L, --skip-line-numbers  //忽略錯誤的行號
 -n, --unbuffered    //每執行一次sql後，重新整理快取
 --column-names      //查尋時顯示列資訊，預設是加上的
 -N, --skip-column-names  //不顯示列資訊
 -O, --set-variable=name  //設定變數用法是--set-variable=var_name=var_value
 --sigint-ignore     //忽視SIGINT符號(登入退出時Control-C的結果)
 -o, --one-database  //忽視除了為命令列中命名的預設資料庫的語句。可以幫跳過日誌中的其它資料庫的更新。
 --pager[=name]      //使用分頁器來顯示查詢輸出，這個要在linux可以用more,less等。
 --no-pager          //不使用分頁器來顯示查詢輸出。
 -p, --password[=name] //輸入密碼
 -P, --port=#        //設定埠
 --prompt=name       //設定mysql提示符
 --protocol=name     //使用什麼協議
 -q, --quick         //不快取查詢的結果，順序列印每一行。如果輸出被掛起，伺服器會慢下來，mysql不使用歷史檔案。
 -r, --raw           //寫列的值而不轉義轉換。通常結合--batch選項使用。
 --reconnect         //如果與伺服器之間的連線斷開，自動嘗試重新連線。禁止重新連線，使用--disable-reconnect。
 -s, --silent        //一行一行輸出，中間有tab分隔
 -S, --socket=name   //連線伺服器的sockey檔案
 --ssl               //啟用ssl連線，不啟用--skip-ssl
 --ssl-ca=name       //CA證書
 --ssl-capath=name   //CA路徑
 --ssl-cert=name     //X509 證書
 --ssl-cipher=name   //SSL cipher to use (implies --ssl).
 --ssl-key=name      //X509 金鑰名
 --ssl-verify-server-cert //連線時稽核伺服器的證書
 -t, --table         //以表格的形勢輸出
 --tee=name          //將輸出拷貝新增到給定的檔案中，禁時用--disable-tee
 --no-tee            //根--disable-tee功能一樣
 -u, --user=name     //使用者名稱
 -U, --safe-updates  //Only allow UPDATE and DELETE that uses keys.
 -U, --i-am-a-dummy  //Synonym for option --safe-updates, -U.
 -v, --verbose       //輸出mysql執行的語句
 -V, --version       //版本資訊
 -w, --wait          //伺服器down後，等待到重起的時間
 --connect_timeout=# //連線前要等待的時間
 --max_allowed_packet=# //伺服器接收／傳送包的最大長度
 --net_buffer_length=# //TCP / IP和套接字通訊緩衝區大小。
 --select_limit=#    //使用--safe-updates時SELECT語句的自動限制
 --max_join_size=#   //使用--safe-updates時聯接中的行的自動限制
 --secure-auth       //拒絕用(pre-4.1.1)的方式連線到資料庫
 --server-arg=name   //Send embedded server this as a parameter.
 --show-warnings     //顯示警告

Usage: mysql [OPTIONS] [database]
-?, --help Display this help and exit.
-I, --help Synonym for -?
--auto-rehash Enable automatic rehashing. One doesn't need to use
'rehash' to get table and field completion, but startup
and reconnecting may take a longer time. Disable with
--disable-auto-rehash.
(Defaults to on; use --skip-auto-rehash to disable.)
-A, --no-auto-rehash
No automatic rehashing. One has to use 'rehash' to get
table and field completion. This gives a quicker start of
mysql and disables rehashing on reconnect.
--auto-vertical-output
Automatically switch to vertical output mode if the
result is wider than the terminal width.
-B, --batch Don't use history file. Disable interactive behavior.
(Enables --silent.)
--bind-address=name IP address to bind to.
--character-sets-dir=name
Directory for character set files.
--column-type-info Display column type information.
-c, --comments Preserve comments. Send comments to the server. The
default is --skip-comments (discard comments), enable
with --comments.
-C, --compress Use compression in server/client protocol.
-#, --debug[=#] This is a non-debug version. Catch this and exit.
--debug-check Check memory and open file usage at exit.
-T, --debug-info Print some debug info at exit.
-D, --database=name Database to use.
--default-character-set=name
Set the default character set.
--delimiter=name Delimiter to be used.
--enable-cleartext-plugin
Enable/disable the clear text authentication plugin.
-e, --execute=name Execute command and quit. (Disables --force and history
file.)
-E, --vertical Print the output of a query (rows) vertically.
-f, --force Continue even if we get an SQL error.
-G, --named-commands
Enable named commands. Named commands mean this program's
internal commands; see mysql> help . When enabled, the
named commands can be used from any line of the query,
otherwise only from the first line, before an enter.
Disable with --disable-named-commands. This option is
disabled by default.
-i, --ignore-spaces Ignore space after function names.
--init-command=name SQL Command to execute when connecting to MySQL server.
Will automatically be re-executed when reconnecting.
--local-infile Enable/disable LOAD DATA LOCAL INFILE.
-b, --no-beep Turn off beep on error.
-h, --host=name Connect to host.
-H, --html Produce HTML output.
-X, --xml Produce XML output.
--line-numbers Write line numbers for errors.
(Defaults to on; use --skip-line-numbers to disable.)
-L, --skip-line-numbers
Don't write line number for errors.
-n, --unbuffered Flush buffer after each query.
--column-names Write column names in results.
(Defaults to on; use --skip-column-names to disable.)
-N, --skip-column-names
Don't write column names in results.
--sigint-ignore Ignore SIGINT (CTRL-C).
-o, --one-database Ignore statements except those that occur while the
default database is the one named at the command line.
--pager[=name] Pager to use to display results. If you don't supply an
option, the default pager is taken from your ENV variable
PAGER. Valid pagers are less, more, cat [> filename],
etc. See interactive help (\h) also. This option does not
work in batch mode. Disable with --disable-pager. This
option is disabled by default.
-p, --password[=name]
Password to use when connecting to server. If password is
not given it's asked from the tty.
-P, --port=# Port number to use for connection or 0 for default to, in
order of preference, my.cnf, $MYSQL_TCP_PORT,
/etc/services, built-in default (3306).
--prompt=name Set the mysql prompt to this value.
--protocol=name The protocol to use for connection (tcp, socket, pipe,
memory).
-q, --quick Don't cache result, print it row by row. This may slow
down the server if the output is suspended. Doesn't use
history file.
-r, --raw Write fields without conversion. Used with --batch.
--reconnect Reconnect if the connection is lost. Disable with
--disable-reconnect. This option is enabled by default.
(Defaults to on; use --skip-reconnect to disable.)
-s, --silent Be more silent. Print results with a tab as separator,
each row on new line.
-S, --socket=name The socket file to use for connection.
--ssl Enable SSL for connection (automatically enabled with
other flags).
--ssl-ca=name CA file in PEM format (check OpenSSL docs, implies
--ssl).
--ssl-capath=name CA directory (check OpenSSL docs, implies --ssl).
--ssl-cert=name X509 cert in PEM format (implies --ssl).
--ssl-cipher=name SSL cipher to use (implies --ssl).
--ssl-key=name X509 key in PEM format (implies --ssl).
--ssl-crl=name Certificate revocation list (implies --ssl).
--ssl-crlpath=name Certificate revocation list path (implies --ssl).
--ssl-verify-server-cert
Verify server's "Common Name" in its cert against
hostname used when connecting. This option is disabled by
default.
--ssl-mode=name SSL connection mode.
-t, --table Output in table format.
--tee=name Append everything into outfile. See interactive help (\h)
also. Does not work in batch mode. Disable with
--disable-tee. This option is disabled by default.
-u, --user=name User for login if not current user.
-U, --safe-updates Only allow UPDATE and DELETE that uses keys.
-U, --i-am-a-dummy Synonym for option --safe-updates, -U.
-v, --verbose Write more. (-v -v -v gives the table output format).
-V, --version Output version information and exit.
-w, --wait Wait and retry if connection is down.
--connect-timeout=# Number of seconds before connection timeout.
--max-allowed-packet=#
The maximum packet length to send to or receive from
server.
--net-buffer-length=#
The buffer size for TCP/IP and socket communication.
--select-limit=# Automatic limit for SELECT when using --safe-updates.
--max-join-size=# Automatic limit for rows in a join when using
--safe-updates.
--secure-auth Refuse client connecting to server if it uses old
(pre-4.1.1) protocol.
(Defaults to on; use --skip-secure-auth to disable.)
--server-arg=name Send embedded server this as a parameter.
--show-warnings Show warnings after every statement.
--plugin-dir=name Directory for client-side plugins.
--default-auth=name Default authentication client-side plugin to use.
--histignore=name A colon-separated list of patterns to keep statements
from getting logged into mysql history.
--binary-mode By default, ASCII '\0' is disallowed and '\r\n' is
translated to '\n'. This switch turns off both features,
and also turns off parsing of all clientcommands except
\C and DELIMITER, in non-interactive mode (for input
piped to mysql or loaded using the 'source' command).
This is necessary when processing output from mysqlbinlog
that may contain blobs.
--connect-expired-password
Notify the server that this client is prepared to handle
expired password sandbox mode.

Default options are read from the following files in the given order:
/etc/my.cnf /etc/mysql/my.cnf /usr/etc/my.cnf ~/.my.cnf
The following groups are read: mysql client
The following options may be given as the first argument:
--print-defaults Print the program argument list and exit.
--no-defaults Don't read default options from any option file,
except for login file.
--defaults-file=# Only read default options from the given file #.
--defaults-extra-file=# Read this file after the global files are read.
--defaults-group-suffix=#
Also read groups with concat(group, suffix)
--login-path=# Read this path from the login file.

Variables (--variable-name=value)
and boolean options {FALSE|TRUE} Value (after reading options)
--------------------------------- ----------------------------------------
auto-rehash TRUE
auto-vertical-output FALSE
bind-address (No default value)
character-sets-dir (No default value)
column-type-info FALSE
comments FALSE
compress FALSE
debug-check FALSE
debug-info FALSE
database (No default value)
default-character-set auto
delimiter ;
enable-cleartext-plugin FALSE
vertical FALSE
force FALSE
named-commands FALSE
ignore-spaces FALSE
init-command (No default value)
local-infile FALSE
no-beep FALSE
host (No default value)
html FALSE
xml FALSE
line-numbers TRUE
unbuffered FALSE
column-names TRUE
sigint-ignore FALSE
port 0
prompt mysql>
quick FALSE
raw FALSE
reconnect TRUE
socket (No default value)
ssl FALSE
ssl-ca (No default value)
ssl-capath (No default value)
ssl-cert (No default value)
ssl-cipher (No default value)
ssl-key (No default value)
ssl-crl (No default value)
ssl-crlpath (No default value)
ssl-verify-server-cert FALSE
table FALSE
user (No default value)
safe-updates FALSE
i-am-a-dummy FALSE
connect-timeout 0
max-allowed-packet 16777216
net-buffer-length 16384
select-limit 1000
max-join-size 1000000
secure-auth TRUE
show-warnings FALSE
plugin-dir (No default value)
default-auth (No default value)
histignore (No default value)
binary-mode FALSE
connect-expired-password FALSE