Category: Database

MySQL Create Database with utf8mb4 Character Set Syntax

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Create database

I frequently create database with utf8mb4 character set:

CREATE DATABASE 'mydb' CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci; GRANT ALL ON 'mydb'.* TO 'username'@localhost IDENTIFIED BY 'password'; FLUSH PRIVILEGES;

or

CREATE SCHEMA 'mydb' CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci; GRANT ALL ON 'mydb'.* TO 'username'@localhost IDENTIFIED BY 'password'; FLUSH PRIVILEGES;

Create user

Create user and give privilege to it

create user 'username'@localhost identified by 'password'; grant all privileges on *.* to username@localhost; 
or 
GRANT [type of permission] ON [database name].[table name] TO ‘[username]’@'localhost’;

Change user’s password

Replace the password with the password that you want to use.

MySQL 5.7.6 and later:

ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass';

MySQL 5.7.5 and earlier:

SET PASSWORD FOR 'root'@'localhost' = PASSWORD('MyNewPass');

Here is a short list of other common possible permissions that users can enjoy.

  • ALL PRIVILEGES- as we saw previously, this would allow a MySQL user all access to a designated database (or if no database is selected, across the system)
  • CREATE- allows them to create new tables or databases
  • DROP- allows them to them to delete tables or databases
  • DELETE- allows them to delete rows from tables
  • INSERT- allows them to insert rows into tables
  • SELECT- allows them to use the Select command to read through databases
  • UPDATE- allow them to update table rows
  • GRANT OPTION- allows them to grant or remove other users’ privileges

Reference from :

  • http://www.euperia.com/development/mysql/mysql-create-database-with-utf8-character-set-syntax/1064
  • https://www.digitalocean.com/community/tutorials/how-to-create-a-new-user-and-grant-permissions-in-mysql

Database, MySQL

MySQL Create Database with UTF8 Character Set Syntax

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I always forget the MySQL create database with UTF8 character set syntax, so here it is:

CREATE DATABASE `mydb` CHARACTER SET utf8 COLLATE utf8_general_ci;
GRANT ALL ON `mydb`.* TO `username`@localhost IDENTIFIED BY 'password';
FLUSH PRIVILEGES;

Alternatively, you can use ‘CREATE SCHEMA’ instead of ‘CREATE DATABASE’:

CREATE SCHEMA `mydb` CHARACTER SET utf8 COLLATE utf8_general_ci;
GRANT ALL ON `mydb`.* TO `username`@localhost IDENTIFIED BY 'password';
FLUSH PRIVILEGES;

I hope this helps someone else too!

(*resource : here

Database, MySQL

Access MySQL remotely

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Object : MySQL versi 5.5 on Ubuntu 12.10

Terkadang kita memiliki database MySql yang tidak menyatu IP nya dengan server aplikasi, maka server database perlu dipersiapkan agar dapat diakses secara remote.
Yang perlu kita konfigurasi adalah file my.cnf yang biasanya terletak di /etc/mysql/.
Bukalah file tersebut lalu cari dan ganti :
bind-address = 127.0.0.1
menjadi
bind-address = 0.0.0.0
Simpanlah file tersebut, kemudian restart server MySQL nya :

sudo /etc/init.d/mysql restart

Untuk memastikan bahwa MySQL server sudah bisa diakses dari jaringan, coba cek dengan perintah :

netstat -anp | grep 3306

jika Anda menemukan teks seperti di bawah ini :

tcp        0      0 0.0.0.0:3306            0.0.0.0:*               LISTEN     -

Ini artinya MySQL kita sudah bisa diakses dari jaringan.
Kemudian langkah terakhir adalah memberikan kewenangan pada user siapa saja akses ini bisa gunakan, dengan cara mengatur previleges user :
mysql> GRANT ALL PRIVILEGES ON *.* TO <username>@'%' IDENTIFIED BY '<password>';
Gantilah <username> dan <password> dengan yang sesuai Anda inginkan.
Semoga berhasil, Tetap Semangat! TS!

Database, MySQL, Software Development ,

Search Path di PostgreSQL

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Search Path (search_path) adalah daftar schema yang menjadi patokan bagi PostgreSQL untuk mencari objek yang digunakan, apakah itu table, view, dan sebagainya. Urutan daftar ini juga akan menentukan prioritas pencarian. Untuk menampilkan current search path :

#show search_path;
ossystem=# show search_path;
           search_path           
---------------------------------
 sys, public, helpdesk, hrd, sym
(1 row)

Untuk membentuk search_path kita mengunakan statement SET, contoh  :

SET search_path TO my_schema, public;

 

Database, PostgreSQL

How To Create a New User and Grant Permissions in MySQL

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I always forget the MySQL create database with UTF8 character set syntax, so here it is:

CREATE DATABASE `mydb` CHARACTER SET utf8 COLLATE utf8_general_ci;
GRANT ALL ON `mydb`.* TO `username`@localhost IDENTIFIED BY 'password';
FLUSH PRIVILEGES;

Alternatively, you can use ‘CREATE SCHEMA’ instead of ‘CREATE DATABASE’:

CREATE SCHEMA `mydb` CHARACTER SET utf8 COLLATE utf8_general_ci;
GRANT ALL ON `mydb`.* TO `username`@localhost IDENTIFIED BY 'password';
FLUSH PRIVILEGES;

I hope this helps someone else too!

Database, MySQL

Reset user root MySql

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Login sebagai user root system

$ sudo -i
# _

Matikan service MySQL :

# service mysql stop

Hidupkan kembali service MySQL dengan melepas authentication/grant

# service mysql start --skip-grant-tables

Jika langkah di atas mengalamai kendala, silahkan lakukan hal berikut:

$ sudo service mysql start
$ cd /var/run
$ cp -rp ./mysqld ./mysqld.bak
$ sudo service mysql stop
$ sudo mv ./mysqld.bak ./mysqld
$ sudo mysqld_safe --skip-grant-tables --skip-networking &

Masuk ke MySQL sebagai user ‘root’ dan masuk ke database ‘mysql’:

# mysql -u root mysql
mysql>

Ubah password ‘root’:

mysql> FLUSH PRIVILEGES;
mysql> update user set Password=PASSWORD('passwordbaru') where user='root';
Query OK, 0 rows affected (0.00 sec)
Rows matched: 4  Changed: 0  Warnings: 0

Sekarang user : root dari MySQL sudah memiliki pasword baru, selanjutnya restart kembali MySQL ke mode normal:

# service mysql restart

MySQL
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