Uyiphatha kanjani i-database ye-MySQL? Imiyalo ye-SSH yokuphatha amaseva e-MySQL

indlela yokuphathaMySQL database? Ukuphathwa komyalo we-SSHMySQLiseva

MySQL Ukuphatha

Qala futhi umise iseva ye-MySQL

Okokuqala, sidinga ukuhlola ukuthi iseva ye-MySQL iphezulu yini ngokusebenzisa umyalo olandelayo:

ps -ef | grep mysqld

Uma i-MySql isivele iqalile, umyalo ongenhla uzokhipha uhlu lwezinqubo ze-mysql, uma i-mysql ingaqalwanga, ungasebenzisa umyalo olandelayo ukuqala iseva ye-mysql:

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

Uma ufuna ukuvala iseva ye-MySQL esebenzayo njengamanje, ungenza umyalo olandelayo:

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

Izilungiselelo Zomsebenzisi we-MySQL

Uma udinga ukwengeza umsebenzisi we-MySQL, udinga nje ukwengeza umsebenzisi omusha etafuleni lomsebenzisi ku-database ye-mysql.

Okulandelayo isibonelo sokwengeza umsebenzisi, igama lomsebenzisi isivakashi, igama eliyimfihlo lithi guest123, futhi umsebenzisi ugunyazwe ukwenza imisebenzi ethi KHETHA, UKUFAKA NOKUBUYEKEZA:

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)

Lapho ungeza umsebenzisi, sicela uqaphele ukuthi iphasiwedi ibethelwe kusetshenziswa umsebenzi we-PASSWORD() ohlinzekwa yi-MySQL.Ungabona kulesi sibonelo esingenhla ukuthi iphasiwedi yomsebenzisi ebethelwe ithi: 6f8c114b58f2ce9e.

Qaphela:Ku-MySQL 5.7, igama eliyimfihlo letafula lomsebenzisi lithathelwe indawo yii-authentication_string,

Qaphela:Qaphela isidingo sokusebenzisa FLUSH AMALUNGELO isitatimende.Ngemuva kokuthi lo myalo usukhishiwe, ithebula lesibonelelo lizolayishwa kabusha.

Uma ungawusebenzisi lo myalo, ngeke ukwazi ukusebenzisa umsebenzisi osanda kwakhiwa ukuze uxhume kuseva ye-mysql ngaphandle kokuthi uqale kabusha iseva ye-mysql.

Lapho udala umsebenzisi, ungacacisa izimvume zomsebenzisi. Kukholomu yemvume ehambisanayo, isethe ukuze ithi 'Y' esitatimendeni sokufaka. Uhlu lwezimvume zomsebenzisi lumi kanje:

• Khetha_okuyimfihlo
• Insert_priv
• Update_priv
• Delete_priv
• Dala_imfihlo
• drop_priv
• Layisha kabusha_okuyimfihlo
• shutdown_priv
• Process_priv
• Ifayela_priv
• Grant_priv
• Izithenjwa_priv
• Inkomba_priv
• Alter_priv

Enye indlela yokwengeza abasebenzisi ngomyalo we-GRANT we-SQL. Umyalo olandelayo uzongeza umsebenzisi u-zara kusizindalwazi esishiwo TUTORIALS, futhi igama-mfihlo 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';

Umyalo ongenhla uzodala irekhodi lolwazi lomsebenzisi kuthebula lomsebenzisi ku-database ye-mysql.

Isaziso: Izitatimende ze-MySQL SQL ziqedwa nge-semicolon (;).

/etc/my.cnf ukucushwa kwefayela

Ngaphansi kwezimo ezijwayelekile, awudingi ukushintsha ifayela lokumisa, ukucushwa okuzenzakalelayo kwefayela kungokulandelayo:

[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

Efayelini lokumisa, ungacacisa uhla lwemibhalo lapho kugcinwa khona amafayela elogi anephutha ahlukene. Ngokuvamile, awudingi ukushintsha lokhu kulungiselelwa.

Imiyalo yokuphatha i-MySQL

Okulandelayo kubala imiyalo evame ukusetshenziswa ohlelweni lokusebenzisa i-Mysql database:

• UKUSETSHENZISWA Igama lokugcina idatha :
  Khetha isizindalwazi se-Mysql esizosetshenziswa Ngemva kokusebenzisa lo myalo, yonke imiyalo ye-Mysql ingeyalesi sizindalwazi kuphela.

  mysql> use chenweiliang;
  Database changed

• BONISA IMINININGWANE: 
  Iklelisa uhlu lwesizindalwazi sohlelo lokuphathwa kwesizindalwazi se-MySQL.

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

• BONISA AMATHEBULA:
  Bonisa wonke amathebula esizindalwazi esicacisiwe Ngaphambi kokusebenzisa lo myalo, udinga ukusebenzisa umyalo wokusebenzisa ukuze ukhethe isizindalwazi esizosetshenziswa.

  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 AMAKHOLUMU ASUKA ishidi le-data:
  Bonisa izibaluli zethebula ledatha, izinhlobo zezibaluli, ulwazi oluyinhloko oluyinhloko, noma ngabe LU-NULL, inani elizenzakalelayo 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 INHLOKO KUSUKA ishidi le-data:
  Bonisa imininingwane yenkomba enemininingwane yethebula ledatha, okuhlanganisa UKHIYE OWUNGU-PRIMARY (ukhiye oyinhloko).

  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 ISIMO SETHEBULA NJENGETHI [KUSUKA ku-db_name] [NJENGA 'iphethini'] \G:
  Lo myalo uzokhipha ukusebenza kanye nezibalo zohlelo lokuphathwa kwedatha ye-Mysql.

  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