Uyilawula njani idatabase yeMySQL? Imiyalelo ye-SSH yokulawula iiSeva zeMySQL

indlela yokulawulaMySQL database? Ulawulo lomyalelo we-SSHMySQL服务器

MySQL Ulawulo

Qala kwaye umise iseva ye-MySQL

Okokuqala, kufuneka sijonge ukuba iseva ye-MySQL iphezulu ngokuqhuba lo myalelo ulandelayo:

ps -ef | grep mysqld

Ukuba i-MySql sele iqalisiwe, lo myalelo ungasentla uya kukhupha uluhlu lweenkqubo ze-mysql, ukuba i-mysql ayiqalwanga, ungasebenzisa lo myalelo ulandelayo ukuqalisa iseva ye-mysql:

root@host# cd /usr/bin
./mysqld_safe &

Ukuba ufuna ukuvala iseva ye-MySQL esebenzayo ngoku, ungenza lo myalelo ulandelayo:

root@host# cd /usr/bin
./mysqladmin -u root -p shutdown
Enter password: ******

Iisetingi zoMsebenzisi weMySQL

Ukuba ufuna ukongeza umsebenzisi we-MySQL, udinga nje ukongeza umsebenzisi omtsha kwitafile yomsebenzisi kwi-database ye-mysql.

Oku kulandelayo ngumzekelo wokongezwa komsebenzisi, igama lomsebenzisi lundwendwe, igama eliyimfihlo lindwendwe123, kwaye umsebenzisi ugunyazisiwe ukwenza KHETHA, UKUFAKA NOHLAZIYA imisebenzi:

root@host# mysql -u root -p
Enter password:*******
mysql> use mysql;
Database changed

mysql> INSERT INTO user 
          (host, user, password, 
           select_priv, insert_priv, update_priv) 
           VALUES ('localhost', 'guest', 
           PASSWORD('guest123'), 'Y', 'Y', 'Y');
Query OK, 1 row affected (0.20 sec)

mysql> FLUSH PRIVILEGES;
Query OK, 1 row affected (0.01 sec)

mysql> SELECT host, user, password FROM user WHERE user = 'guest';
+-----------+---------+------------------+
| host      | user    | password         |
+-----------+---------+------------------+
| localhost | guest | 6f8c114b58f2ce9e |
+-----------+---------+------------------+
1 row in set (0.00 sec)

Xa ufaka umsebenzisi, nceda uqaphele ukuba igama eligqithisiweyo lifihliwe kusetyenziswa PASSWORD () umsebenzi onikezwe nguMySQL.Ungabona kulo mzekelo ungasentla ukuba igama eliyimfihlo lomsebenzisi elifihliweyo lithi: 6f8c114b58f2ce9e.

Qaphela:Kwi-MySQL 5.7, igama eligqithisiweyo letafile yomsebenzisi lithathelwe indawo yiauthentication_string,

Qaphela:Qaphela imfuneko yokuphumeza FLUSH AMALUNGELO ingxelo.Emva kokuba lo myalelo uphunyeziwe, itafile yesibonelelo iya kulayishwa kwakhona.

Ukuba awusebenzisi lo myalelo, awuyi kukwazi ukusebenzisa umsebenzisi omtsha ukudibanisa kumncedisi we-mysql ngaphandle kokuba uqale kabusha iseva ye-mysql.

Xa usenza umsebenzisi, ungakhankanya iimvume zomsebenzisi.Kuluhlu lwemvume ehambelanayo, yibeke ku-'Y' kwisiteyitimenti sofakelo.Uluhlu lweemvume zomsebenzisi lungolu lulandelayo:

• Khetha_okuyimfihlo
• Insert_priv
• Hlaziya_priv
• Cima_imfihlo
• Create_priv
• drop_priv
• Layisha kwakhona_imfihlo
• shutdown_priv
• Inkqubo_yabucala
• Ifayile_priv
• Grant_priv
• IiReferensi_priv
• Index_priv
• Alter_priv

Enye indlela yokongeza abasebenzisi kungomyalelo we-GRANT we-SQL Umyalelo olandelayo uyakongeza umsebenzisi u-zara kwindawo echaziweyo ye-TUTORIALS yedatha, kwaye igama eliyimfihlo lithi zara123.

root@host# mysql -u root -p password;
Enter password:*******
mysql> use mysql;
Database changed

mysql> GRANT SELECT,INSERT,UPDATE,DELETE,CREATE,DROP
    -> ON TUTORIALS.*
    -> TO 'zara'@'localhost'
    -> IDENTIFIED BY 'zara123';

Umyalelo ongentla uza kudala irekhodi yolwazi lomsebenzisi kwitafile yomsebenzisi kwi-database ye-mysql.

Phawula: Iingxelo ze-MySQL ze-SQL zipheliswa nge-semicolon (;).

/etc/my.cnf uqwalaselo lwefayile

Phantsi kweemeko eziqhelekileyo, awudingi ukuguqula ifayile yoqwalaselo, uqwalaselo olungagqibekanga lwefayile ngolu hlobo lulandelayo:

[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock

[mysql.server]
user=mysql
basedir=/var/lib

[safe_mysqld]
err-log=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

Kwifayile yoqwalaselo, ungakhankanya uvimba weefayili apho iifayile zelogi ezahlukeneyo zempazamo zigcinwa khona.

Imiyalelo yokulawula iMySQL

Oku kulandelayo kudwelisa imiyalelo eqhele ukusetyenziswa kwinkqubo yokusebenzisa isiseko sedata seMysql:

• SEBENZISA Igama lokugcina idatha :
  Khetha i-database ye-Mysql eza kusetyenziswa Emva kokusebenzisa lo myalelo, yonke imiyalelo ye-Mysql yeyesiseko sedatha kuphela.

  mysql> use chenweiliang;
  Database changed

• BONISA IIDABASE: 
  Udwelisa uluhlu lwesiseko sedatha yenkqubo yolawulo lwesiseko sedatha yeMySQL.

  mysql> SHOW DATABASES;
  +--------------------+
  | Database           |
  +--------------------+
  | information_schema |
  | chenweiliang             |
  | cdcol              |
  | mysql              |
  | onethink           |
  | performance_schema |
  | phpmyadmin         |
  | test               |
  | wecenter           |
  | wordpress          |
  +--------------------+
  10 rows in set (0.02 sec)

• BONISA IITHEBILE:
  Bonisa zonke iitheyibhile zedathabheyisi ekhankanyiweyo Ngaphambi kokusebenzisa lo myalelo, kufuneka usebenzise umyalelo wosetyenziso ukukhetha uvimba wedatha oza kusetyenziswa.

  mysql> use chenweiliang;
  Database changed
  mysql> SHOW TABLES;
  +------------------+
  | Tables_in_chenweiliang |
  +------------------+
  | employee_tbl     |
  | chenweiliang_tbl       |
  | tcount_tbl       |
  +------------------+
  3 rows in set (0.00 sec)

• BONISA IKHOLAM ESUKA ishiti yedatha:
  Bonisa iimpawu zetafile yedatha, iintlobo zeempawu, ulwazi oluphambili olungundoqo, nokuba luyi-NULL, ixabiso elingagqibekanga kunye nolunye ulwazi.

  mysql> SHOW COLUMNS FROM chenweiliang_tbl;
  +-----------------+--------------+------+-----+---------+-------+
  | Field           | Type         | Null | Key | Default | Extra |
  +-----------------+--------------+------+-----+---------+-------+
  | chenweiliang_id       | int(11)      | NO   | PRI | NULL    |       |
  | chenweiliang_title    | varchar(255) | YES  |     | NULL    |       |
  | chenweiliang_author   | varchar(255) | YES  |     | NULL    |       |
  | submission_date | date         | YES  |     | NULL    |       |
  +-----------------+--------------+------+-----+---------+-------+
  4 rows in set (0.01 sec)

• BONISA ISALATHISO SUKA ishiti yedatha:
  Bonisa ulwazi lwesalathiso oluneenkcukacha lwetheyibhile yedatha, kubandakanywa ISINQONDO SOMNQOPHISO (iqhosha lokuqala).

  mysql> SHOW INDEX FROM chenweiliang_tbl;
  +------------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
  | Table      | Non_unique | Key_name | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment |
  +------------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
  | chenweiliang_tbl |          0 | PRIMARY  |            1 | chenweiliang_id   | A         |           2 |     NULL | NULL   |      | BTREE      |         |               |
  +------------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
  1 row in set (0.00 sec)

• BONISA IMEKO YETHEYIBHILE NJENGE [UKUSUKA db_igama] [NJENGA 'ipatheni'] \G:
  Lo myalelo uya kukhupha ukusebenza kunye neenkcukacha zenkqubo yolawulo lwesiseko sesiseko seMysql.

  mysql> SHOW TABLE STATUS  FROM chenweiliang;   # 显示数据库 chenweiliang 中所有表的信息
  
  mysql> SHOW TABLE STATUS from chenweiliang LIKE 'chenweiliang%';     # 表名以chenweiliang开头的表的信息
  mysql> SHOW TABLE STATUS from chenweiliang LIKE 'chenweiliang%'\G;   # 加上 \G，查询结果按列打印