My sql administration
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This document discusses various topics related to installing, configuring, and managing MySQL databases including: - Using command line tools like mysqladmin and mysql to configure and manage MySQL. - Installing MySQL via packages or source code and configuring startup settings. - Creating, deleting, and managing databases, tables, and user privileges. - Performing backups with mysqldump and restoring from backups. - Monitoring the status of the MySQL server process.
![ Login to MySQL server
#mysql –h hostname –u root -p
Create a database
msql> create database [databasename];
List all databases on the MySQL server
msql> show databases;](https://image.slidesharecdn.com/mysqladministration-111228215104-phpapp01/85/My-sql-administration-11-320.jpg)
![ Swicth to a database
msql> use [db_name];
To see all the tables in the db
msql> show tables;
To delete a db
msql> drop database [databasename];](https://image.slidesharecdn.com/mysqladministration-111228215104-phpapp01/85/My-sql-administration-12-320.jpg)
![ To see database‟s field formats
msql> describe [table name];
To delete a table
msql> drop table [table name];
Show all data in a table
msql> SELECT * FROM [table name];](https://image.slidesharecdn.com/mysqladministration-111228215104-phpapp01/85/My-sql-administration-13-320.jpg)
![ To update info already in table
mysql> UPDATE [table name] SET Select_priv = 'Y',Insert_priv
= 'Y',Update_priv = 'Y' where [field name] = 'user';
Delete a rows from table
mysql> DELETE from [table name] where [field name] =
'whatever';
Update database permissions/privileges
mysql> flush privileges;](https://image.slidesharecdn.com/mysqladministration-111228215104-phpapp01/85/My-sql-administration-23-320.jpg)
![ Example
mysql> create table [table name] (personid int(50) not null
auto_increment primary key,firstname varchar(35),middlename
varchar(50),lastnamevarchar(50) default „yasin');
mysql> CREATE TABLE [table name] (firstname
VARCHAR(20), middleinitial VARCHAR(3), lastname
VARCHAR(35),suffix VARCHAR(3),officeid VARCHAR(10),userid
VARCHAR(15),username VARCHAR(8),email VARCHAR(35),phone
VARCHAR(25), groups VARCHAR(15),datestamp DATE,timestamp
time,pgpemail VARCHAR(255));](https://image.slidesharecdn.com/mysqladministration-111228215104-phpapp01/85/My-sql-administration-26-320.jpg)
My sql administration
- 1. Mohd Yasin Abd Karim [email protected]
- 2. Configuring Monitoring, Starting & Stopping Managing Users and Connection Performing backups Others
- 4. Mysqladmin or mysql GUI ◦ MySQL Administrator ◦ MySQL Workbench ◦ phpMyAdmin
- 5. OS packages place files in many areas and varies ◦ e.g. /usr/lib, /var/lib, /var/log, /etc Source rpm, yum, .tar.gz, exe Online/repo update ◦ #yum update mysql-* For Ms Windows Environment C:>cd localmysqlbin C:localmysqlbin> Local folder normally Program Files folder
- 6. Start MySQL process before create database To configure MySQL start at boot time #chkconfig mysqld on Or using GUI tools such as OS Services Management
- 7. After boot time using the services commands #service mysqld start #service mysqld stop #Service mysqld restart Remember to restart mysqld process every time after configuration changed
- 8. to know whether your MySQL server is alive #pgrep mysqld Should get response process ID numbers Or #mysqladmin –u root –p ping The "mysqld is alive" message tells you that your MySQL server is running ok. If your MySQL server is not running, you will get a "connect ... failed" message.
- 9. my.cnf ◦ Watch out for /etc/my.cnf, /etc/mysql/my.cnf To get the server listening on all interfaces, use 0.0.0.0 as the bind address. i.e.: --bind-address=0.0.0.0
- 10. Configured to listen TCP/IP Port (default 3306) Additional Instances ◦ Different Ports ◦ Different IP‟s using default Port Local connection using Socket
- 11. Login to MySQL server #mysql –h hostname –u root -p Create a database msql> create database [databasename]; List all databases on the MySQL server msql> show databases;
- 12. Swicth to a database msql> use [db_name]; To see all the tables in the db msql> show tables; To delete a db msql> drop database [databasename];
- 13. To see database‟s field formats msql> describe [table name]; To delete a table msql> drop table [table name]; Show all data in a table msql> SELECT * FROM [table name];
- 14. SHOW TABLES; SHOW WARNINGS; SHOW STATUS; FLUSH STATUS; SHOW VARIABLES; SHOW VARIABLES LIKE „%size%‟; SHOW VARIABLES LIKE „sort_buffer_size‟; SHOW GLOBAL STATUS;
- 15. to check version number of your MySQL server C:localmysqlbin>mysqladmin -u root version
- 16. According to the /etc/my.cnf Usually located in subdirectory /var/lib/mysql/ directory Example : test database ◦ /var/lib/mysql/test
- 17. Root or superuser account is used to create and delete database New installation MySQL set password #mysqladmin –u root password new-password
- 18. to know what else you can do with "mysqladmin", you should run the "-?" #mysqladmin –?
- 19. Creating new user # mysql -u root -p mysql> use mysql; mysql> INSERT INTO user (Host,User,Password) VALUES('%','username',PASSWORD('password')); mysql> flush privileges;
- 20. Change a user password from unix shell # mysqladmin -u username -h hostname.org -p password 'new-password' Change user password from MySQL prompt # mysql -u root -p mysql> SET PASSWORD FOR 'user'@'hostname' = PASSWORD('passwordhere'); mysql> flush privileges;
- 21. Update root password # mysqladmin -u root -p oldpassword newpassword Allow the user “bob” to connect to server from localhost using password „passwd‟ # mysql -u root -p mysql> use mysql; mysql> grant usage on *.* to bob@localhost identified by 'passwd'; mysql> flush privileges;
- 22. Give user privileges for a db. # mysql -u root -p mysql> use mysql; mysql> INSERT INTO db (Host,Db,User,Select_priv,Insert_priv,Update_priv,Delete_priv ,Create_priv,Drop_priv) VALUES ('%','databasename','username','Y','Y','Y','Y','Y','N'); mysql> flush privileges; or mysql> grant all privileges on databasename.* to username@localhost; mysql> flush privileges;
- 23. To update info already in table mysql> UPDATE [table name] SET Select_priv = 'Y',Insert_priv = 'Y',Update_priv = 'Y' where [field name] = 'user'; Delete a rows from table mysql> DELETE from [table name] where [field name] = 'whatever'; Update database permissions/privileges mysql> flush privileges;
- 24. Dump all databases for backup # mysqldump -u root -ppassword --opt >/tmp/alldatabases.sql Dump one database for backup # mysqldump -u username -ppassword --databases databasename >/tmp/databasename.sql Dump a table from a database # mysqldump -c -u username -ppassword databasename tablename > /tmp/databasename.tablename.sql
- 25. Restore database / table from backup # mysql -u username -ppassword databasename < /tmp/databasename.sql
- 26. Example mysql> create table [table name] (personid int(50) not null auto_increment primary key,firstname varchar(35),middlename varchar(50),lastnamevarchar(50) default „yasin'); mysql> CREATE TABLE [table name] (firstname VARCHAR(20), middleinitial VARCHAR(3), lastname VARCHAR(35),suffix VARCHAR(3),officeid VARCHAR(10),userid VARCHAR(15),username VARCHAR(8),email VARCHAR(35),phone VARCHAR(25), groups VARCHAR(15),datestamp DATE,timestamp time,pgpemail VARCHAR(255));
- 27. [email protected]
Editor's Notes
- #10: By default MySQL listens on all your interfaces for database queries from remote MySQL clients. You can see this using netstat -an. Your server will be seen to be listening on IP address 0.0.0.0 (all) on TCP port 3306. Multiple MySQL Instances