This question already has answers here:
How do I rename a MySQL database (change schema name)?
(46 answers)
Closed 10 days ago.
How can I rename the MySQL database name using query?
I tried rename database via phpmyadmin and getting the following error,
SQL query:
RENAME DATABASE test TO test_bkp
MySQL said:
#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'DATABASE test To test_bkp' at line 1
In phpmyadmin you can just click on your database, then go to the Operations tab which lets you rename it.
It says here that:
This statement was added in MySQL 5.1.7 but was found to be dangerous
and was removed in MySQL 5.1.23. It was intended to enable upgrading
pre-5.1 databases to use the encoding implemented in 5.1 for mapping
database names to database directory names (see Section 9.2.3,
“Mapping of Identifiers to File Names”). However, use of this
statement could result in loss of database contents, which is why it
was removed. Do not use RENAME DATABASE in earlier versions in which
it is present.
You can import all data into a new database then delete the old one.
It is also possible to use the RENAME TABLE statement using same from/to table name but different from/to database. There are a few catches.
CREATE DATABASE `test_bkp`;
RENAME TABLE
`test`.`table1` TO `test_bkp`.`table1`,
`test`.`table2` TO `test_bkp`.`table2`,
`test`.`table3` TO `test_bkp`.`table3`;
It's been disabled by the developers. See http://dev.mysql.com/doc/refman/5.1/en/rename-database.html
Adding to this, I'd use a copy (then delete) rather than a rename. Have a look at Cloning a MySQL database on the same MySql instance
You can do this in MySQL < 5.1.23
with
RENAME {DATABASE | SCHEMA} db_name TO new_db_name;
In later versions have a look at
ALTER {DATABASE | SCHEMA} [db_name]
Ok, so if the rename option doesn't show, here a quick way of cloning a database using phpMyAdmin:
Open the database you want to copy
Click the Operations tab.
where it says "Copy database to:" type in the name of the new database.
Select "structure and data" to copy everything or "Structure only"
Check the box "CREATE DATABASE before copying" to create a new database.
Check the box "Add AUTO_INCREMENT value."
Click on the Go button to proceed.
NB before deleting the old database, make sure that passwords have also copied over.
in wamp server
click on databases
then choose your database
from header menu choose operations
make the new name
it will rename the database
but actually it create a new database copy all the data then drop the old data base
Export current database.
create a new database with a name you want.
import old database file on the new database.
Well, it's possible to rename your database but here's the logic behind the rename option.
1. Xampp creates a new database with the name
2. Xampp copies all table and data in it from the previous database
3. Xampp migrates data to the new database table and drops the previous database
Steps to rename Database
1. Click the Operations option in the nav pane
2. Find the ' Rename database to ' Spot, and input new name in the input field
3. Tick the ' Adjust privileges ' checkbox
4. Click go
I hope this works! :)
you can export your databse table, create a new one and import table to the new database!
also you can rename your data base using phpmyadmin by selecting your database and click on operations tab and rename your database!
the last and not recommended way is create a new databse and use this, but you may lost your data!
CREATE DATABASE new_db_name / DROP DATABASE old_db_name
Related
This question already has answers here:
How do I rename a MySQL database (change schema name)?
(46 answers)
Closed 9 days ago.
How can I change the database name of my database?
I tried to use the rename database command, but on the documents about it it is said that it is dangerous to use. Then what should I need to do to rename my database name?
For example, if I want to rename my database to this.
database1 -> database2?
Follow bellow steps:
shell> mysqldump -hlocalhost -uroot -p database1 > dump.sql
mysql> CREATE DATABASE database2;
shell> mysql -hlocalhost -uroot -p database2 < dump.sql
If you want to drop database1 otherwise leave it.
mysql> DROP DATABASE database1;
Note : shell> denote command prompt and mysql> denote mysql prompt.
I don't think it's possible.
You can use mysqldump to dump the data and then create a schema with your new name and then dump the data into that new database.
Unfortunately, MySQL does not explicitly support that (except for dumping and reloading database again).
From http://dev.mysql.com/doc/refman/5.1/en/rename-database.html:
13.1.32. RENAME DATABASE Syntax
RENAME {DATABASE | SCHEMA} db_name TO new_db_name;
This statement was added in MySQL 5.1.7 but was found to be dangerous and was removed in MySQL 5.1.23. ... Use of this statement could result in loss of database contents, which is why it was removed. Do not use RENAME DATABASE in earlier versions in which it is present.
"As long as two databases are on the same file system, you can use RENAME TABLE to move a table from one database to another"
-- ensure the char set and collate match the existing database.
SHOW VARIABLES LIKE 'character_set_database';
SHOW VARIABLES LIKE 'collation_database';
CREATE DATABASE `database2` DEFAULT CHARACTER SET = `utf8` DEFAULT COLLATE = `utf8_general_ci`;
RENAME TABLE `database1`.`table1` TO `database2`.`table1`;
RENAME TABLE `database1`.`table2` TO `database2`.`table2`;
RENAME TABLE `database1`.`table3` TO `database2`.`table3`;
http://dev.mysql.com/doc/refman/5.7/en/rename-table.html
You can change the database name using MySQL interface.
Go to http://www.hostname.com/phpmyadmin
Go to database which you want to rename. Next, go to the operation tab. There you will find the input field to rename the database.
InnoDB supports RENAME TABLE statement to move table from one database to another. To use it programmatically and rename database with large number of tables, I wrote a couple of procedures to get the job done.
You can check it out here - SQL script #Gist
To use it simply call the renameDatabase procedure.
CALL renameDatabase('old_name', 'new_name');
Tested on MariaDB and should work ideally on all RDBMS using InnoDB transactional engine.
I agree with above answers and tips but there is a way to change database name with phpmyadmin
Renaming the Database
From cPanel, click on phpMyAdmin. (It should open in a new tab.)
Click on the database you wish to rename in the left hand column.
Click on the Operations tab.
Where it says "Rename database to:" enter the new database name.
Click the Go button.
When it asks you to want to create the new database and drop the old database, click OK to proceed. (This is a good time to make sure you spelled the new name correctly.)
Once the operation is complete, click OK when asked if you want to reload the database.
here's the video tutorial:
http://support.hostgator.com/articles/specialized-help/technical/phpmyadmin/how-to-rename-a-database-in-phpmyadmin
Another way to rename the database or taking an image of the database is by using the reverse engineering option in the database tab. It will create an ER diagram for the database. Rename the schema there.
After that, go to the File menu and go to export and forward engineer the database.
Then you can import the database.
Sequel Ace database client have a rename database functionality. Select the database you would like to edit and click Database in the menu and then click Rename Database from the dropdown. Rename the database and ckick rename. Done!
After much aggravation this is what I have found to work"simply".
First thing, I am using MYSQL Workbench and the import would not work as it should, as the import dump file would always revert to the original schema name.
I spent several hours trying every thing to no avail,all for a spelling error.
I solved the issue by opening one of the .sql dump files in notebook and hand editing the typo's of the schema name, take care to rename all instances schema name has three in the beginning, save the file and then import. this worked perfectly for me and hope that it will help others looking for the simple answer to changing database names/schema names.
One more tip that I have found true, when programs do not do as they should go to the "source" literally find the source code.
Hope this helps someone
Low rep so they wont let me comment on the prior/post answer(it keeps changing rank or position), so I added it here. reverse engineering will work fine as long as there is no data in the sever table. if data exists and you try to update the server after the name change it will either pull an error or just create a new database/schema with no data, I know I tried ten times to no avail.
The above works simply and avoids headaches, as one can review the SQL code for other errors if any or change table names or creation data.
the .sql file is just a compiled SQL code so in theory one could copy and add it through PHP or the script console of the database management tool.
You can use below command
alter database Testing modify name=LearningSQL;
Old Database Name = Testing,
New Database Name = LearningSQL
Go to data directory and try this:
mv database1 database2
It works for me on a 900 MB database size.
Try:
RENAME database1 TO database2;
How to take database backup using MySQL Workbench? Can we take backup in the following ways-
Backup file(.sql) contains both Create Table statements and Insert into Table Statements
Backup file(.sql) contains only Create Table Statements, not Insert into Table statements for all tables
Backup file(.sql) contains only Insert into Table Statements, not Create Table statements for all tables
For Workbench 6.0
Open MySql workbench.
To take database backup you need to create New Server Instance(If not available) within Server Administration.
Steps to Create New Server Instance:
Select New Server Instance option within Server Administrator.
Provide connection details.
After creating new server instance , it will be available in Server Administration list. Double click on Server instance you have created OR Click on Manage Import/Export option and Select Server Instance.
Now, From DATA EXPORT/RESTORE select DATA EXPORT option,Select Schema and Schema Object for backup.
You can take generate backup file in different way as given below-
Q.1) Backup file(.sql) contains both Create Table statements and Insert into Table Statements
ANS:
Select Start Export Option
Q.2) Backup file(.sql) contains only Create Table Statements, not Insert into Table statements for all tables
ANS:
Select Skip Table Data(no-data) option
Select Start Export Option
Q.3) Backup file(.sql) contains only Insert into Table Statements, not Create Table statements for all tables
ANS:
Select Advance Option Tab, Within Tables Panel- select no-create info-Do not write CREATE TABLE statement that re-create each dumped table option.
Select Start Export Option
For Workbench 6.3
Click on Management tab at left side in Navigator Panel
Click on Data Export Option
Select Schema
Select Tables
Select required option from dropdown below the tables list as per your requirement
Select Include Create schema checkbox
Click on Advance option
Select Complete insert checkbox in Inserts Panel
Start Export
For Workbench 8.0
Go to Server tab
Go to Database Export
This opens up something like this
Select the schema to export in the Tables to export
Click on Export to Self-Contained file
Check if Advanced Options... are exactly as you want the export
Click the button Start Export
Sever > Data Export
Select database, and start export
On ‘HOME’ page -- > select 'Manage Import / Export' under 'Server Administration'
A box comes up... choose which server holds the data you want to back up.
On the 'Export to Disk' tab, then select which databases you want to export.
If you want all the tables, select option ‘Export to self-contained file’, otherwise choose the other option for a selective restore
If you need advanced options, see other post, otherwise then click ‘Start Export’
In Window in new version you can export like this
The Data Export function in MySQL Workbench allows 2 of the 3 ways. There's a checkbox Skip Table Data (no-data) on the export page which allows to either dump with or without data. Just dumping the data without meta data is not supported.
In Workbench 6.3 it is supereasy:
On the "HOME"-view select one of the MySQL Connections: (localhost)
In the "Localhost" view click on "Server"--> "Data export"
In the "Data Export" view select the table(s) and whether you want to export only their structure, or structure and data,...
Click "Start Export"
In workbench 6.0
Connect to any of the database.
You will see two tabs.
1.Management
2. Schemas
By default Schemas tab is selected.
Select Management tab
then select Data Export .
You will get list of all databases.
select the desired database and and the file name and ther options you wish and start export.
You are done with backup.
I am using MySQL Workbench 8.0:
In Workbench 6.3 go to Server menu and then Choose Data Export. The dialog that comes up allows you to do all three things you want.
Why I cannot alter my schema name from the MYSQL Workbench? Am i missing something? :(
As you can the name is dissabled
There is no RENAME available for schema names. You will have to export the schema, then import with a new database name.
This is a limitation of the MySQL server itself.
Actually, you can rename database name very easily,
go to the top menu -> Database -> reverse engineering, select your database and keep go further until you get the er diagram of your database,
after the there is an area called Catalog Area under that you can see your database name, right click on that and select edit schema. and change your database name
now again go to the top menu -> database -> forward engineering and completed the database engineering using the wizard.
I can't imagine that anyone is still using version 5.5, but here is the procedure I followed in version 8. If you do have an older/newer version this may still work.
Connect to the database.
Open the Database menu and choose Migration Wizard.
Start Migration.
Both source and target will be the current MySQL server.
Select the schema you want to rename.
For Source Objects make sure all the tables are selected.
Click Next and you will see a message that the source and target are the same.
Now you should see a "Manual Editing" step.
Under the Target Object column, click on the database name and change it.
Now you can click next all the way through.
Once finished you will have a newly renamed schema.
Currently my database has no indexes, stored procedures, etc. You will
want to confirm all related objects are migrated as well before
dropping the old database.
Gavin is right, but if your server have phpMyAdmin, you can use it to rename your database (schema):
Go to your phpMyAdmin URL. Default is http://yourdomain.com/phpMyAdmin/
If prompted, enter your database username and password.
Click on "Operations" tab.
Under "Rename database to:" write your new database name.
Click "Go" button.
If prompted, click "OK".
After some seconds, depending on your database content, you will have your database renamed.
What phpMyAdmin is actually doing is create a new database with your new name, import the content from your current database and delete your current database.
I've created and edited a couple of tables and don't want to recreate them from scratch if the database gets erased. What command allows me to "export" the field names and settings (NOT the content) as a ready to use MYSQL command that I can paste back on the MYSQL prompt?
SHOW CREATE TABLE tablename;
Reference: mySQL docs
If I have a MySQL database with several tables on a live server, now I would like to migrate this database to another server. Of course, the migration I mean here involves some database tables, for example: add some new columns to several tables, add some new tables etc..
Now, the only method I can think of is to use some php/python(two scripts I know) script, connect two databases, dump the data from the old database, and then write into the new database. However, this method is not efficient at all. For example: in old database, table A has 28 columns; in new database, table A has 29 columns, but the extra column will have default value 0 for all the old rows. My script still needs to dump the data row by row and insert each row into the new database.
Using MySQLDump etc.. won't work. Here is the detail. For example: I have FOUR old databases, I can name them as 'DB_a', 'DB_b', 'DB_c', 'DB_d'. Now the old table A has 28 columns, I want to add each row in table A into the new database with a new column ID 'DB_x' (x to indicate which database it comes from). If I can't differentiate the database ID by the row's content, the only way I can identify them is going through some user input parameters.
Is there any tools or a better method than writing a script yourself? Here, I dont need to worry about multithread writing problems etc.., I mean the old database will be down (not open to public usage etc.., only for upgrade ) for a while.
Thanks!!
I don't entirely understand your situation with the columns (wouldn't it be more sensible to add any new columns after migration?), but one of the arguably fastest methods to copy a database across servers is mysqlhotcopy. It can copy myISAM only and has a number of other requirements, but it's awfully fast because it skips the create dump / import dump step completely.
Generally when you migrate a database to new servers, you don't apply a bunch of schema changes at the same time, for the reasons that you're running into right now.
MySQL has a dump tool called mysqldump that can be used to easily take a snapshot/backup of a database. The snapshot can then be copied to a new server and installed.
You should figure out all the changes that have been done to your "new" database, and write out a script of all the SQL commands needed to "upgrade" the old database to the new version that you're using (e.g. ALTER TABLE a ADD COLUMN x, etc). After you're sure it's working, take a dump of the old one, copy it over, install it, and then apply your change script.
Use mysqldump to dump the data, then echo output.txt > msyql. Now the old data is on the new server. Manipulate as necessary.
Sure there are tools that can help you achieving what you're trying to do. Mysqldump is a premier example of such tools. Just take a glance here:
http://dev.mysql.com/doc/refman/5.1/en/mysqldump.html
What you could do is:
1) You make a dump of the current db, using mysqldump (with the --no-data option) to fetch the schema only
2) You alter the schema you have dumped, adding new columns
3) You create your new schema (mysql < dump.sql - just google for mysql backup restore for more help on the syntax)
4) Dump your data using the mysqldump complete-insert option (see link above)
5) Import your data, using mysql < data.sql
This should do the job for you, good luck!
Adding extra rows can be done on a live database:
ALTER TABLE [table-name] ADD [row-name] MEDIUMINT(8) default 0;
MySql will default all existing rows to the default value.
So here is what I would do:
make a copy of you're old database with MySql dump command.
run the resulting SQL file against you're new database, now you have an exact copy.
write a migration.sql file that will modify you're database with modify table commands and for complex conversions some temporary MySql procedures.
test you're script (when fail, go to (2)).
If all OK, then goto (1) and go live with you're new database.
These are all valid approaches, but I believe you want to write a sql statement that writes other insert statements that support the new columns you have.