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mysql> select host,user,Grant_priv from mysql.user; +---------------------+-------------+------------------+------------+ | host | user | password | Grant_priv | +---------------------+-------------+------------------+------------+ | localhost | root | 284e59d71f64e3ec | Y | | cloud.flateight.com | root | | Y | | 127.0.0.1 | root | | Y | | localhost | | | N | | cloud.flateight.com | | | N | | localhost | postfix | 3ec7dddf23d89d39 | N | | localhost | matsukaze | 7f9f27246ddab376 | N | | localhost | stats | 3cf31278467575ed | N | | localhost | nagata | 423da20727393e52 | N | | localhost | cacti | 6d43317a3705f19e | N | | localhost | iline8 | 6e4d585d01239c27 | N | | localhost | eccube_user | 284e59d71f64e3ec | N | +---------------------+-------------+------------------+------------+ 12 rows in set (0.00 sec)
mysql> SHOW GRANTS FOR testdb_user@localhost; +----------------------------------------------------------------------------------------------------+ | Grants for testdb_user@localhost | +----------------------------------------------------------------------------------------------------+ | GRANT ALL PRIVILEGES ON *.* TO 'testdb_user'@'localhost' IDENTIFIED BY PASSWORD '370f8eb673c9467f' | +----------------------------------------------------------------------------------------------------+
グローバルレベル GRANT ALL ON *.* TO user; GRANT SELECT, INSERT ON *.* TO user; データベースレベル GRANT ALL ON db_name.* TO user; GRANT SELECT, INSERT ON mydb.* TO user;
mysql> revoke all on *.* from 'testdb_user'@'localhost';
mysql> select host, db, user from mysql.db; +-------------+-----------+-----------+ | host | db | user | +-------------+-----------+-----------+ | % | test | | | % | test\_% | | | 172.16.0.3 | mc_portal | mc_portal | | 172.20.0.35 | mc_diem | mc_portal | +-------------+-----------+-----------+ 4 rows in set (0.00 sec)
CREATE USER 'matsui'@'localhost' IDENTIFIED BY 'pass';
testデータベースに対して全ての権限を持ったmatsuiユーザ作成、パスワードはpass
mysql> grant all privileges on test.* to 'matsui'@'localhost' identified by 'pass';
※CREATE USER はユーザーの作成に使用されます。
mysql> grant all privileges on test.* to matsui@localhost identified by 'pass' with grant option;
mysql> GRANT SELECT ON *.* TO 'readonly_user'@'localhost' IDENTIFIED BY 'pass';
matuiユーザを削除
mysql> delete from mysql.user where user='matsui' and host='localhost';
こっちの方が簡単
mysql> DROP USER 'matsui'@'localhost';
mysql> RENAME USER 'FROM_USER'@'192.168.0.%' TO 'TO_USER'@'192.168.1.%';
mysql> create database test;
mysql> create table test;
ダンプしたものを、コピーしたいDBにパイプで繋げてあげる。
# mysqldump sourceDB | mysql destinationDB
※データベース名の変更はできないので、create databaseして、データベースをコピーする事で対応する。
mysql> create database 新データベース名 character set utf8; # mysqldump 旧データベース名 | mysql 新データベース名
CREATE TABLE hoge_tbl ( id int PRIMARY KEY AUTO_INCREMENT, name text );
/* hogeテーブルのスキーマをコピーしてテーブル作成 */ > CREATE TABLE hoge_tbl LIKE hoge; /* hogeテーブルのデータをINSERT */ > INSERT INTO hoge_tbl SELECT * FROM hoge;
ALTER TABLE tbl_name RENAME [TO] new_tbl_name;
DESCRIBE データベース名.テーブル名 ;
または
DESC データベース名.テーブル名 ;
-例
mysql> DESCRIBE mysql.user;
+-----------------------+-----------------------------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-----------------------+-----------------------------------+------+-----+---------+-------+
| Host | varchar(60) | NO | PRI | | |
| User | varchar(16) | NO | PRI | | |
| Password | varchar(16) | NO | | | |
| Select_priv | enum('N','Y') | NO | | N | |
| Insert_priv | enum('N','Y') | NO | | N | |
| Update_priv | enum('N','Y') | NO | | N | |
| Delete_priv | enum('N','Y') | NO | | N | |
| Create_priv | enum('N','Y') | NO | | N | |
| Drop_priv | enum('N','Y') | NO | | N | |
| Reload_priv | enum('N','Y') | NO | | N | |
| Shutdown_priv | enum('N','Y') | NO | | N | |
| Process_priv | enum('N','Y') | NO | | N | |
| File_priv | enum('N','Y') | NO | | N | |
| Grant_priv | enum('N','Y') | NO | | N | |
| References_priv | enum('N','Y') | NO | | N | |
| Index_priv | enum('N','Y') | NO | | N | |
| Alter_priv | enum('N','Y') | NO | | N | |
| Show_db_priv | enum('N','Y') | NO | | N | |
| Super_priv | enum('N','Y') | NO | | N | |
| Create_tmp_table_priv | enum('N','Y') | NO | | N | |
| Lock_tables_priv | enum('N','Y') | NO | | N | |
| Execute_priv | enum('N','Y') | NO | | N | |
| Repl_slave_priv | enum('N','Y') | NO | | N | |
| Repl_client_priv | enum('N','Y') | NO | | N | |
| ssl_type | enum('','ANY','X509','SPECIFIED') | NO | | | |
| ssl_cipher | blob | NO | | NULL | |
| x509_issuer | blob | NO | | NULL | |
| x509_subject | blob | NO | | NULL | |
| max_questions | int(11) unsigned | NO | | 0 | |
| max_updates | int(11) unsigned | NO | | 0 | |
| max_connections | int(11) unsigned | NO | | 0 | |
+-----------------------+-----------------------------------+------+-----+---------+-------+
31 rows in set (0.01 sec)
mysql> alter table テーブル名 modify カラム名 データ型;
例: test_tbl の type カラムをchar(6)へ変更
mysql> desc test_tbl; +-------+---------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------+---------+------+-----+---------+-------+ | id | int(11) | NO | PRI | NULL | | | type | text | YES | | NULL | | +-------+---------+------+-----+---------+-------+ 2 rows in set (0.00 sec) mysql> alter table test_tbl modify type char(6); mysql> desc test_tbl; +-------+---------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------+---------+------+-----+---------+-------+ | id | int(11) | NO | PRI | NULL | | | type | char(6) | YES | | NULL | | +-------+---------+------+-----+---------+-------+ 2 rows in set (0.00 sec)
ALTER TABLE テーブル名 ADD 追加するカラム名 型 AFTER カラム名; ALTER TABLE テーブル名 ADD 追加するカラム名 型 FIRST;
ALTER TABLE テーブル名 CHANGE COLUMN 旧カラム名 新カラム名 新カラム型;
ALTER TABLE テーブル名 ADD INDEX (カラム名);
SHOW VARIABLES LIKE 'character%';
mysql> show create database データベース名;
CREATE DATABASE hoge CHARACTER SET SJIS;
mysql> show create table テーブル名 \G
SET NAMES 'sjis'; 使える文字コード sjis ujis utf8
mysql> STATUS -------------- mysql Ver 14.14 Distrib 5.1.28-rc, for portbld-freebsd6.3 (i386) using 5.2 Connection id: 104553 Current database: syslog Current user: root@localhost SSL: Not in use Current pager: stdout Using outfile: '' Using delimiter: ; Server version: 5.1.28-rc-log FreeBSD port: mysql-server-5.1.28 Protocol version: 10 Connection: Localhost via UNIX socket Server characterset: ujis Db characterset: ujis Client characterset: ujis Conn. characterset: ujis UNIX socket: /tmp/mysql.sock Uptime: 15 days 11 hours 10 min 32 sec Threads: 2 Questions: 2293516 Slow queries: 0 Opens: 14189 Flush tables: 22 Open tables: 64 Queries per second avg: 1.716 --------------
SELECT * from information_schema.schemata WHERE schema_name like [DB_NAME];
ALTER DATABASE [DB_NAME] CHARACTER SET [CHARACTER_NAME] COLLATE [COLLATION_NAME];
※CHARACTER_NAMEだけを指定した場合の照会順序は、「show charset」で見た「Default collation」がセットされます。
SHOW TABLE STATUS FROM [DB_NAME];
ALTER TABLE `テーブル名` COLLATE utf8_unicode_ci
SHOW FULL COLUMNS FROM [TABLE_NAME];
ALTER TABLE [TABLE_NAME] MODIFY COLUMN [COLUMN_NAME] text COLLATE `utf8_unicode_ci`;
INSERT INTO hoge_tbl VALUES(1,'aaaa'); INSERT INTO hoge_tbl(id,name) VALUES(1,'aaaa'); INSERT INTO hoge_tbl(name) VALUES('aaaa');
SELECT table_name FROM information_schema.tables WHERE table_type = 'VIEW';
create view dbname.hogetable as ( select * from footable )
show create view dbname.hogetable
drop view dbname.hogetable
alter view dbname.hogetable as ( select * from footable )
ユーザのパスワード変更した後などは、リフレッシュしないと適応されてない可能性があります。
mysql> FLUSH PRIVILEGES; Query OK, 0 rows affected (0.05 sec)