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MySQL ±âÃÊ ÀÍÈ÷±â  
»õ ÆäÀÌÁö 1
3. MySQL ±âÃÊ ÀÍÈ÷±â


3.1. MySQL ±âº» ¸í·É¾î


MySQLÀ» ´Ù·ç±â À§Çؼ­´Â MySQLÀÇ ±âº» ¸í·É¾îµéÀ» ÀÌ¿ëÇÏ°Ô µÈ´Ù.

±×·³ ¾î¶² ¸í·É¾îµéÀÌ ¾î¶²½ÄÀ¸·Î »ç¿ëµÇ´ÂÁö »ìÆ캸µµ·Ï ÇÏ°Ú´Ù.



¡á mysql


mysql ¸í·É¾îÀÇ °æ¿ì UNIXÀÇ daemon ÇüÅ·Π½ÇÇàµÇ´Â mysqld server¿¡ ¿¬°áÇÏ¿© »ç¿ëÇϱ⠶§¹®¿¡ client programÀ̶ó°í º¼ ¼ö ÀÖ´Ù.

mysqlÀº terminal »ó¿¡¼­ mysqld¸¦ Á¢¼ÓÇÏ¿© ÀÌ¿ëÇÒ ¶§ »ç¿ëÇÏ´Â ¸í·É¾îÀÌ´Ù.

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mysql Ver 10.8 Distrib 3.23.xx, for redhat-linux-gnu (i386)
Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
This software comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to modify and redistribute it under the GPL license


Usage: mysql [OPTIONS] [database]

-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.

-B, --batch                         Print results with a tab as separator, each row on a new line.
                                         Doesn't use history file

--character-sets-dir=...     Directory where character sets are

-C, --compress                  Use compression in server/client protocol

-D, --database=..             Database to use

--default-character-set=...
                                         Set the default character set

-e, --execute=...                Execute command and quit.(Output like with --batch)

-E, --vertical                      Print the output of a query (rows) vertically

-f, --force                          Continue even if we get an sql error.

-g, --no-named-commands
                                        Named commands are disabled. Use \*form only

-i, --ignore-space             Ignore space after function names

-h, --host=..                     Connect to host

-H, --html                         Produce HTML output

-L, --skip-line-numbers    Don't write line number for errors

-n, --unbuffered               Flush buffer after each query

-N, --skip-column-name    Don't write column names in results

-O, --set-variable var=option
                                        Give a varible an value. --help lists variables

-o, --one-database          Only update the default database. This is useful for skipping
                                        updates to other database in the update log.

-p[password], --password[=...]
                                        Password to use when connection to server. If password is
                                        not given it's asked from the tty.


-P --port=...                     Port number to use for connection

-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

-s, --silent                        Be more silent.

-S, --socket=...                Socket file to use for connection

-t --table                         Output in table format

-T, --debug-info               Print some debug info at exit

-u, --user=#                    User for login if not current user

-U, --safe-updates[=#], --i-am-adumy[=#]
                                        Only allow UPDATE and DELETE that uses keys

-v, --verbose                   Write more (-v -v -v gives the table output format)

-V, --version                    Output information and exit

-w, --wait                        Wait and retry if connection is down

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¡á mysqladmin


mysqld daemon¿¡ ´ëÇÑ °ü¸®ÀÚ¿ë utility programÀÌ´Ù.

DB »ý¼º »èÁ¦ ¹× ¼öÁ¤, º¯°æ µîÀÇ ÀÛ¾÷À» ÇÒ ¼ö ÀÖÀ¸¸ç, ±âŸ ¿©·¯ Á¤º¸µéÀ» Ãâ·ÂÇÑ´Ù.

¡á mysql_install_db


MySQLÀÇ ¼³Ä¡°¡ ³¡³ª¸é Á¦ÀÏ ¸ÕÀú ½ÇÇà½ÃÄÑ ÁÖ´Â ¸í·É¾îÀÌ´Ù.

ÀÌ°ÍÀº MySQLÀ» óÀ½ ½ÃÀÛÇϱâ Àü¿¡ ±âÃÊ Å×À̺íÀ» »ý¼ºÇÏ´Â script fileÀÌ´Ù.


¡á safe_mysqld


MySQL daemonÀ» ½ÇÇàÇÒ ¶§ »ç¿ëÇÏ´Â ¸í·É¾îÀÌ´Ù.

MySQLÀÇ daemonÀ» ¾ÈÁ¤µÈ »óÅ¿¡¼­ ½ÇÇà½ÃÅ°±â ¶§¹®¿¡, mysqld ¸í·É¾î ´ë½Å ÀÌ°ÍÀ» ¸¹ÀÌ »ç¿ëÇÑ´Ù.

ÀÌ ¹Û¿¡ ¿©·¯ ¸í·É¾îµéÀÌ Àִµ¥, ¿©±â¼­´Â »ý·«Çϸç, ¿©·¯ºÐµéÀÇ ¸òÀ¸·Î µ¹¸°´Ù. :-)



3.2. MySQL ±âÃÊ Å×ÀÌºí »ý¼ºÇϱâ


MySQLÀ» ¼³Ä¡ÇÏ°í ³­ ÈÄ¿¡ mysqld daemonÀ» ½ÇÇàÇϱâ Àü¿¡ ¹Ýµå½Ã ±âÃÊ Å×À̺í(grant-table)À» »ý¼ºÇØ¾ß ÇÑ´Ù.

±× ÀÌÀ¯´Â ¾î¶² »ç¿ëÀÚ°¡ MySQL server¿¡ Á¢¼ÓÇؼ­ Å×À̺íÀÇ »ý¼º/»èÁ¦ ¹× µ¥ÀÌÅÍÀÇ ¼öÁ¤ µî¿¡ ´ëÇØ ±ÇÇÑÀ» ºÎ¿©Çϱâ À§Çؼ­ ÀÌ´Ù.

±âÃÊ Å×À̺í(grant-table)¿¡ µî·Ï µÈ »ç¿ëÀÚ¸¸ÀÌ MySQL server¿¡ Á¢¼ÓÇÒ ¼ö ÀÖ´Â °ÍÀÌ´Ù.

½ÇÇà ¹æ¹ýÀº,

]#pwd
/usr/local/system/mysql/bin
]#mysql_install_db



±×·³ MySQL daemonÀ» ½ÇÇà½ÃÅ°µµ·Ï ÇÏ°Ú´Ù.

½ÇÇà ¹æ¹ýÀº,

]#pwd
/usr/local/system/mysql/bin
]#./safe_mysqld &
]Starting mysqld daemon with database from /usr/local/system/mysql/var



MySQL daemonÀ» Á×ÀÌ´Â ¹æ¹ýÀº ¸î °¡Áö ÀÖÁö¸¸, ÇÊÀÚÀÇ °æ¿ì´Â,

]#killall mysqld

ÀÌ ¹æ¹ýÀ» »ç¿ëÇÑ´Ù.


±×·³, MySQL server¿¡ Á¢¼ÓÇØ º¸µµ·Ï ÇÏ°Ú´Ù.

]#pwd
/usr/local/system/mysql/bin
]#./mysql -u root


¿©±â¼­ -U root optionÀº MySQLÀÇ root ±ÇÇÑÀ¸·Î MySQL server¿¡ Á¢¼ÓÇÏ°Ú´Ù´Â °ÍÀ» ÀǹÌÇÏ´Â °ÍÀÌ´Ù.

óÀ½¿¡ MySQLÀ» ¼³Ä¡ÇÏ°í ³ª¸é MySQL DB user´Â ¿ÀÁ÷ root »ÓÀ̱⠶§¹®¿¡ Æнº¿öµåµµ ¼³Á¤µÇ¾î ÀÖÁö ¾ÊÀº »óÅÂÀÌ´Ù.

µû¶ó¼­ MySQL root Æнº¿öµå´Â óÀ½ Á¢¼ÓÇؼ­ ¼³Á¤ÇØ ÁÖ¸é µÈ´Ù.

MySQL root Æнº¿öµå´Â Linux systemÀÇ root Æнº¿öµå¿Í´Â ´Ù¸£´Ù.

¾Æ¹«·± »ó°üÀÌ ¾ø´Ù.

´Ù½Ã ¸»ÇØ, Æнº¿öµå¸¦ ¶È°°ÀÌ ¼³Á¤ÇÒ ÇÊ¿ä´Â ¾ø´Ù.

MySQL root Æнº¿öµå¸¦ ¼³Á¤ÇÏ´Â °ÍÀº Á¶±Ý µÚ¿¡ ¾Ë¾Æº¼ °ÍÀÌ´Ù.

À§¿Í °°ÀÌ Á¢¼ÓÀ» ÇÏ°Ô µÇ¸é ¾Æ·¡¿Í °°Àº MySQL shellÀÌ ³ªÅ¸³­´Ù.

¡¡

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]#./mysql -u root -p mysql
Welcome to the MySQL monitor. Commands end with : or \g.
Your MySQL connection id is 1 to server version: 3.23.xx

Type 'help;' or '\h' for help. Type '\c' to clear the buffer

mysql>

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À§ÀÇ mysql> °¡ mysqld promptÀÌ´Ù.

ÀÌ »óÅ¿¡¼­ MySQL DBÀÇ query¸¦ ÀÔ·ÂÇÏ°Ô µÈ´Ù.

ÀÌ ºÎºÐ¿¡ ´ëÇؼ­´Â ´ÙÀ½ Àå¿¡¼­ ´Ù·ç°Ô µÉ °ÍÀÌ´Ù.


±×·³, ÇöÀç »ý¼º µÈ DBÀÇ ¸ñ·ÏÀ» º¸µµ·Ï ÇÏÀÚ.

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]#./mysql -u root -p mysql
Welcome to the MySQL monitor. Commands end with : or \g.
Your MySQL connection id is 1 to server version: 3.23.xx

Type 'help' for help.

mysql> show databases;

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| Database |
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| mysql     |
| test         |
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2 rows in set (0.00 sec)

mysql>

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show databases; ¸í·É¾î´Â ÇöÀç MySQL¿¡ »ý¼ºµÈ DBÀÇ ¸ñ·ÏÀ» Ãâ·Â½ÃÅ°±â À§ÇÑ query(ÁúÀǾî)ÀÌ´Ù.

À§¿Í °°ÀÌ Ãʱâ DB »óÅ´ mysql°ú test µÎ °³ÀÇ DB°¡ Á¸ÀçÇÏ°Ô µÈ´Ù.

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mysql>
mysql>
mysql>
mysql> use mysql;

Reading table information for completion of table and column names
You can turn off this feathurre to get a quicker startup with -A

Database changed
mysql>



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À§ÀÇ »óÅ´ use mysql; ¸í·ÉÀ» ÅëÇØ DB ³»ÀÇ mysql À̶õ Å×ÀÌºí¿¡ Á¢±ÙÇÑ »óŸ¦ º¸¿©ÁØ´Ù.

ÀÌ·± ½ÄÀ¸·Î Å×ÀÌºí¿¡ Á¢±ÙÇϱâ À§Çؼ­´Â use mysql; ¸í·ÉÀ» ÀÌ¿ëÇÏ°Ô µÈ´Ù.

¾Æ·¡ÀÇ »óÅ´ mysql Å×ÀÌºí¿¡ Á¢±ÙÇؼ­ Å×À̺íÀÇ ¸ñ·ÏÀ» Ãâ·ÂÇÑ »óÅÂÀÌ´Ù.

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mysql>show tables;
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| Tables_in_mysql  |
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| columns_priv       |
| db                      |
| func                    |
| host                    |
| tables_priv           |
| user                    |
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6 rows in set (0.00 sec)

mysql>

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¿©±â±îÁö MySQL DB¿¡ ´ëÇØ ¾ÆÁÖ °£·«ÇÏ°Ô »ìÆ캸¾Ò´Ù.

´ÙÀ½ ÀåºÎÅÍ´Â MySQLÀ» º»°ÝÀûÀ¸·Î ´Ù·ïº¸µµ·Ï ÇÏ°Ú´Ù.

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54   MySQL È°¿ëÇϱâ(3)    3729
53   MySQL È°¿ëÇϱâ(2)    3170
52   MySQL È°¿ëÇϱâ(1)    3415
51   MySQL ±âÃÊ ÀÍÈ÷±â    4762
50   RDBMS(Relational Batabase Management Sys...    3336
49   DATABASE ÀÌÇØ    2844
48   WEB Server¿Í DB ¼­¹ö ºÐ¸®Çؼ­ ¿î¿µÇÏ±â    2966
47   Å×À̺í·ÎºÎÅÍ Á¤º¸¸¦ °Ë»öÇØ Çϱâ 1    2546
46   Å×ÀÌºí¿¡ ÀڷḦ ³Ö±â    2572
45   µ¥ÀÌÅͺ£À̽º ¸¸µé°í ¼±ÅÃÇÏ±â    2631
44   µ¥ÀÌÅͺ£À̽º ¸¸µé°í »ç¿ëÇÏ±â    2524
43   ¸í·É¾î ÀÔ·Â    2568

 
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