I've seen a few posts about insert a table into another table (with the same columns) but i'm having trouble figuring out how to do this across different databases. I see that you reference the database first with the dot operator and then the table ie. database.table but the databases are completely separate instances (separate login credentials etc.) when i reference one database the another database doesn't recognize it. What would be the best way to accomplish what it is i'm trying to do?
I running the DBs on AWS if that helps
once logged in, there is no way to connect to another database (as far as I know - please correct me if I'm wrong). so you have to have to export your data first and then import it.
mysqldump is the tool for exporting, e.g. mysqldump -h HOST -u USER -p database table > export.sql
import it then via e.g. mysql -h HOST -u USER -p database table < export.sql
In my xampp,i could not start the MYSQL section.So XAMP re installed.Before reinstallation i keep database backup from the path C:\xampp\mysql\data.
After reinstallation paste datafolder content into this path.Then I tried to accessing phpmyadmin,then database and table names are listed there.But there is no content into each table.While clicking the database table, it shows an error table does not exist.Please give any solution for my this issue.Thanks in advance
Well, dumping DBs is pretty easy. I assume you are on localhost and your user name is root.
Make sure your MySQL server is up and running.
Run Command line and for dumping ALL your DBs, type:
mysqldump -u root -p --all-databases > dump.sql
Hit Enter. The system will ask you for a MySQL password, type it and hit enter. If there's no password set for your server, just hit Enter. Your dump file will be saved in the current directory.
To restore the dump (e.g. after you reinstalled MySQL), run Command line again and make sure you are in the same directory where your dump.sql is. Type:
mysql -u root -p < dump.sql
It will ask you for a password. You know what to do. Depending on how many data you have it can take some prolonged time. Hope it will help!
P.S. Dumping/restoring single DB is a little bit different, let me know if you need it and I will update this post.
This question already has answers here:
How do I rename a MySQL database (change schema name)?
(46 answers)
Closed 8 years ago.
I created a database with the name of hrms. Now I need to change database name to sunhrm. But, It is disabled in MySQL workbench. Can I do that on the Linux server itself?
In case you need to do that from the command line, just copy, adapt & paste this snippet:
mysql -e "CREATE DATABASE \`new_database\`;"
for table in `mysql -B -N -e "SHOW TABLES;" old_database`
do
mysql -e "RENAME TABLE \`old_database\`.\`$table\` to \`new_database\`.\`$table\`"
done
mysql -e "DROP DATABASE \`old_database\`;"
I don't think you can do this. Basic answers will work in many cases, and in others cause data corruptions. A strategy needs to be chosen based on heuristic analysis of your database. That is the reason this feature was implemented, and then removed. [doc]
You'll need to dump all object types in that database, create the newly named one and then import the dump. If this is a live system you'll need to take it down. If you cannot, then you will need to setup replication from this database to the new one.
If you want to see the commands that could do this, #satishD has the details, which conveys some of the challenges around which you'll need to build a strategy that matches your target database.
It's possible to copy database via mysqldump command without storing dump into file:
mysql -u root -p -e "create database my_new_database"
mysqldump -u root -p original_database | mysql -u root -p my_new_database
mysql -u root -p -e "drop database original_database"
You can create a new database exactly as the previous database existed and then drop the old database when you're done. Use the mysqldump tool to create a .sql backup of the database via mysqldump orig_db > orig_db.sql or if you need to use a username and password then run mysqldump -u root -p orig_db > orig_db.sql. orig_db is the name of the database you want to "rename", root would be the user you're logging in as and orig_db.sql would be the file created containing the backup. Now create a new, empty database with the name you want for the database. For example, mysql -u root -p -e "create database new_db". Once that's done, then run mysql -u root -p new_db < orig_db.sql. new_db now exists as a perfect copy of orig_db. You can then drop the original database as you now have it existing in the new database with the database name you wanted.
The short, quick steps without all the above explanation are:
mysqldump -u root -p original_database > original_database.sql
mysql -u root -p -e "create database my_new_database"
mysql -u root -p my_new_database < original_database.sql
mysql -u root -p -e drop database originl_database
Hope this helps and this is a reliable means to accomplish it without using some ad-hoc method that will corrupt your data and create inconsistencies.
You can do it by RENAME statement for each table in your "current_db" after create the new schema "other_db"
RENAME TABLE current_db.tbl_name TO other_db.tbl_name
Source Rename Table Syntax
In short no. It is generally thought to be too dangerous to rename a database. MySQL had that feature for a bit, but it was removed. You would be better off using the workbench to export both the schema and data to SQL then changing the CREATE DATABASE name there before you run/import it.
I used following method to rename the database
take backup of the file using mysqldump or any DB tool eg heidiSQL,mysql administrator etc
Open back up (eg backupfile.sql) file in some text editor.
Search and replace the database name and save file.
Restore the edited SQL file
If your DB contains only MyISAM tables (do not use this method if you have InnoDB tables):
shut down the MySQL server
go to the mysql data directory and rename the database directory (Note: non-alpha characters need to be encoded in a special way)
restart the server
adjust privileges if needed (grant access to the new DB name)
You can script it all in one command so that downtime is just a second or two.
For impatient mysql users (like me), the solution is:
/etc/init.d/mysql stop
mv /var/lib/mysql/old_database /var/lib/mysql/new_database
/etc/init.d/mysql start
First backup the old database called HRMS and edit the script file with replace the word HRMS to SUNHRM. After this step import the database file to the mysql
Another way to rename the database or taking image of the database is by using Reverse engineering option in the database tab. It will create a ERR diagram for the database. Rename the schema there.
after that go to file menu and go to export and forward engineer the database.
Then you can import the database.
I have a DB which is a live one, what I'm looking to do, is to make a copy.
I have access to MySQl via SSH and phpMyAdmin.
Is there a command where I can copy/backup the DB, in a single command/action, without using export/import?
Thanks
mysqldump -u USERNAME -pPASSWORD databaseName > SAVETOFILE.sql
see this http://dev.mysql.com/doc/refman/5.1/en/mysqldump.html for various options available.
you can do via PHPMyAdmin as well see here http://php.about.com/od/learnmysql/ss/mysql_backup_3.htm
Login to phpMyAdmin
Click on your database name
Click on the tab labeled EXPORT
Select all tables you want to backup (usually all)
Default settings usually work, just make sure SQL is checked
Check the SAVE FILE AS box
Hit GO
If you want to create DB that is a copy of above sqldump you need to do run the following command
mysql -u USERNAME -pPASSWORD < SAVEDFILE.sql
But, I feel you are looking for something like replication. In that case you need to set-up master-slave configuration where data gets replicated on slave. See this guide for replication
http://dev.mysql.com/doc/refman/5.0/en/replication-howto.html
Ok, so I found a command that would take a dump of one database and then insert it into another DB using a single command:
mysqldump -u username -ppassword live_db | mysql -u username -ppassword backup_db
I'm trying to "clone" a MySQL database. The problem is with views. When I export a view, the .sql defines the view as database_name.view_name. It doesn't do this for tables, just views. This obviously creates a problem when importing to the second database - the view doesn't get created.
I think I've found the answer. The problems I was running into were being created by phpMyAdmin. From the command line (make sure to create the target database first):
mysqldump -u [username] -p[password] [old_database_name] > dump.sql
mysql -u [username] -p[password] [new_database_name] < dump.sql
No problems.
One thing you may want to try is SqlYog Community, I use it all the time for MySQL and it seems to do a great job of copying entire databases from one server to another, or even on the same server.