Making Life Simple » mysql

Set autoincrement value in mysql

lalit — Mon, 22 Aug 2011 10:59:38 +0000

Sometimes it is necessary to set the starting value of MySQL auto-increment value. This can be set as

alter table table_name auto_increment=XXXX

where table_name is the name of the table and XXXX is the starting value of auto increment

MySQL export/import database

lalit — Thu, 09 Jun 2011 14:06:49 +0000

The easiest way to export is use syntax in command prompt (cmd):
mysqldump -u USER -p PASSWORD DATABASE > filename.sql

To import the same file, the syntax is:
mysql -u USER -p PASSWORD DATABASE < filename.sql

MySQL server has gone away

lalit — Thu, 03 Mar 2011 12:32:03 +0000

While importing a mysql dump file, I was receiving an error “MySQL server has gone away”. The reason is that the maximum allowed packet size was less than the dump file size.

Edit “my.ini” file and update the value for
max_allowed_packet = XXM
where XX is the maximum size.

This should fix the issue.

Recover MySQL root password

lalit — Fri, 26 Dec 2008 16:10:53 +0000

You can recover MySQL database server password with following five easy steps.
Step # 1: Stop the MySQL server process.
Step # 2: Start the MySQL (mysqld) server/daemon process with the –skip-grant-tables option so that it will not prompt for password
Step # 3: Connect to mysql server as the root user
Step # 4: Setup new root password
Step # 5: Exit and restart MySQL server

Here are commands you need to type for each step (login as the root user):
Step # 1 : Stop mysql service
# /etc/init.d/mysql stop
Output:
Stopping MySQL database server: mysqld.

Step # 2: Start to MySQL server w/o password:
# mysqld_safe --skip-grant-tables &
Output:
[1] 5988 Starting mysqld daemon with databases from /var/lib/mysql mysqld_safe[6025]: started

Step # 3: Connect to mysql server using mysql client:
# mysql -u root
Output:
Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 1 to server version: 4.1.15-Debian_1-log

Type ‘help;’ or ‘\h’ for help. Type ‘\c’ to clear the buffer.

mysql>

Step # 4: Setup new MySQL root user password
mysql> use mysql; mysql> update user set password=PASSWORD("NEW-ROOT-PASSWORD") where User='root'; mysql> flush privileges; mysql> quit

Step # 5: Stop MySQL Server:
# /etc/init.d/mysql stop
Output:
Stopping MySQL database server: mysqld STOPPING server from pid file /var/run/mysqld/mysqld.pid mysqld_safe[6186]: ended

[1]+ Done mysqld_safe –skip-grant-tables

Step # 6: Start MySQL server and test it
# /etc/init.d/mysql start # mysql -u root -p

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