Команды mysql

To login (from unix shell) use -h only if needed.

  # [mysql dir]/bin/mysql -h hostname -u root -p

Create a database on the sql server.

   mysql> create database [databasename];

List all databases on the sql server.

   mysql> show databases;

Switch to a database.

  mysql> use [db name];

To see all the tables in the db.

  mysql> show tables;

To see database's field formats.

  mysql> describe [table name];

To delete a db.

  mysql> drop database [database name];

To delete a table.

  mysql> drop table [table name];

Show all data in a table.

  mysql> SELECT * FROM [table name];

Returns the columns and column information pertaining to the designated table.

  mysql> show columns from [table name];

Show certain selected rows with the value «whatever».

  mysql> SELECT * FROM [table name] WHERE [field name] = "whatever";

Show all records containing the name «Bob» AND the phone number '3444444'.

  mysql> SELECT * FROM [table name] WHERE name = "Bob" AND phone_number =
  '3444444';

Show all records not containing the name «Bob» AND the phone number '3444444' order by the phone_number field.

  mysql> SELECT * FROM [table name] WHERE name != "Bob" AND phone_number =
  '3444444' order by phone_number;

Show all records starting with the letters 'bob' AND the phone number '3444444'.

  mysql> SELECT * FROM [table name] WHERE name like "Bob%" AND phone_number =
  '3444444';

Show all records starting with the letters 'bob' AND the phone number '3444444' limit to records 1 through 5.

  mysql> SELECT * FROM [table name] WHERE name like "Bob%" AND phone_number=
  '3444444' limit 1,5;

Use a regular expression to find records. Use «REGEXP BINARY» to force case-sensitivity. This finds any record beginning with a.

  mysql> SELECT * FROM [table name] WHERE rec RLIKE "^a";

Show unique records.

  mysql> SELECT DISTINCT [column name] FROM [table name];

Show selected records sorted in an ascending (asc) or descending (desc).

  mysql> SELECT [col1],[col2] FROM [table name] ORDER BY [col2] DESC;

Return number of rows.

  mysql> SELECT COUNT(*) FROM [table name];

Sum column.

  mysql> SELECT SUM(*) FROM [table name];

Join tables on common columns.

  mysql> select lookup.illustrationid, lookup.personid,person.birthday from lookup left join
  person on lookup.personid=person.personid=statement to join birthday in person table
  with primary illustration id;

Creating a new user. Login as root. Switch to the MySQL db. Make the user. Update privs.

  # mysql -u root -p
  mysql> use mysql;
  mysql> INSERT INTO user (Host,User,Password)
  VALUES('%','username',PASSWORD('password'));
  mysql> flush privileges;

Change a users password from unix shell.

  # [mysql dir]/bin/mysqladmin -u username -h hostname.blah.org -p password
  'new-password'

Change a users password from MySQL prompt. Login as root. Set the password. Update privs.

  # mysql -u root -p
  mysql> SET PASSWORD FOR 'user'@'hostname' = PASSWORD('passwordhere');
  mysql> flush privileges;

Recover a MySQL root password. Stop the MySQL server process. Start again with no grant tables. Login to MySQL as root. Set new password. Exit MySQL and restart MySQL server.

  # /etc/init.d/mysql stop
  # mysqld_safe --skip-grant-tables &
  # mysql -u root
  mysql> use mysql;
  mysql> update user set password=PASSWORD("newrootpassword") where User='root';
  mysql> flush privileges;
  mysql> quit
  # /etc/init.d/mysql stop
  # /etc/init.d/mysql start

Set a root password if there is on root password.

  # mysqladmin -u root password newpassword

Update a root password.

  # mysqladmin -u root -p oldpassword newpassword

Allow the user «bob» to connect to the server from localhost using the password «passwd». Login as root. Switch to the MySQL db. Give privs. Update privs.

  # mysql -u root -p
  mysql> use mysql;
  mysql> grant usage on *.* to bob@localhost identified by 'passwd';
  mysql> flush privileges;

Give user privilages for a db. Login as root. Switch to the MySQL db. Grant privs. Update privs.

  # mysql -u root -p
  mysql> use mysql;
  mysql> INSERT INTO user
  (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;
  To update info already in a table.
  mysql> UPDATE [table name] SET Select_priv = 'Y',Insert_priv = 'Y',Update_priv = 'Y'

where [field name] = 'user'; Delete a row(s) from a table.

  mysql> DELETE from [table name] where [field name] = 'whatever';

Update database permissions/privilages.

  mysql> flush privileges;

Delete a column.

  mysql> alter table [table name] drop column [column name];

Add a new column to db.

  mysql> alter table [table name] add column [new column name] varchar (20);

Change column name.

  mysql> alter table [table name] change [old column name] [new column name] varchar(50);

Make a unique column so you get no dupes. mysql> alter table [table name] add unique ([column name]); Make a column bigger.

  mysql> alter table [table name] modify [column name] VARCHAR(3);

Delete unique from table.

  mysql> alter table [table name] drop index [colmn name];

Load a CSV file into a table.

  mysql> LOAD DATA INFILE '/tmp/filename.csv' replace INTO TABLE [table name]
  FIELDS TERMINATED BY ',' LINES TERMINATED BY '\n' (field1,field2,field3);
 MariaDB [(none)]> LOAD DATA LOCAL INFILE '/tmp/data.csv' replace INTO TABLE visual_phonebook CHARACTER SET utf8 FIELDS TERMINATED BY ',' LINES TERMINATED BY '\n' (id,firstname,lastname,phone1,phone2,company,context,owner,picture,private);

Dump all databases for backup. Backup file is sql commands to recreate all db's.

  # [mysql dir]/bin/mysqldump -u root -ppassword --opt >/tmp/alldatabases.sql

Dump one database for backup.

  # [mysql dir]/bin/mysqldump -u username -ppassword --databases databasename
  >/tmp/databasename.sql

Dump a table from a database.

  # [mysql dir]/bin/mysqldump -c -u username -ppassword databasename tablename >
  /tmp/databasename.tablename.sql

Restore database (or database table) from backup.

  # [mysql dir]/bin/mysql -u username -ppassword databasename < /tmp/databasename.sql

Create Table Example 1.

  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));

Create Table Example 2.

  mysql> create table [table name] (personid int(50) not null auto_increment primary
  key,firstname varchar(35),middlename varchar(50),lastnamevarchar(50) default 'bato');
  

Select last N row from table CDR - DB asteriskcdrdb

 select * from cdr ORDER BY acctid DESC LIMIT 5;
 
 select * from cdr ORDER BY calldate DESC LIMIT 5;

Export csv

 # mysql <database> -e "select * from <table>" | tr '\t' ',' > table.csv

Система

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  • system/mysql_commands.txt
  • Последние изменения: 2015/09/14