This question already has answers here:
How do I rename a MySQL database (change schema name)?
(46 answers)
Closed 9 days ago.
I am developing a web project using Java and MySQL. I am using Mysql Workbench. I started the work but now I need to change the database name. I tried
ALTER DATABASE Test MODIFY NAME = NewTest
and
USE master
GO
ALTER DATABASE Test
SET SINGLE_USER
WITH ROLLBACK IMMEDIATE
GO
ALTER DATABASE Test MODIFY NAME = NewTest
GO
ALTER DATABASE NewTest
SET MULTI_USER
GO
But these two are showing syntax error. What is the proper way to change database name in MySQL?
Renaming a schema is not possible in MySQL. For the correct ALTER SCHEMA syntax see the online manual.
I ran this code from a Microsoft Windows command prompt:
cd %ProgramFiles%\MySQL\MySQL Server 5.6\bin
mysqldump -u username -p -v olddatabase > olddbdump.sql
mysqladmin -u username -p create newdatabase
mysql -u username -p newdatabase < olddbdump.sql
Related
I've got a MySQL database I'm using for a live project and I want to create a copy of it on the same server that I can use for development purposes. I have used MySQL dump to create a copy of the live database. I did this as follows:
mysqldump -u root -p mydatabase_live > mydatabase_dump.sql
I then logged into MySQL and created an empty database called mydatabase_test. I then try to copy the dump to the newly created database_test by logging back out of MySQL and doing the following:
mysql -u root -p database_test < mydatabase_dump.sql
This gives me the error message ERROR 1359 (HY000) at line 527: Trigger already exists.
When I log back into MySQL and examine the triggers on the database I've just took a dump of, I cannot see any triggers with duplicate names. I've tried repeating the above process in case there was some kind of error in the initial dump, but the problem repeats.
Can anyone explain why I'm getting this error message and how to solve this?
I'm using MySQL Ver 14.14 Distrib 5.7.25, for Linux
* NOTE ADDING DETAIL TO THE ANSWER ACCEPTED BELOW *
The MySQL dump file can be opened in a text editor. I used vim. The solution was to find the triggers and change the part of the trigger name which identifies it as belonging to the schema from which you took the dump, changing it to the schema you're aiming the dump at. In my case that meant changing mydatabase_live.my_table to mydatabase_test.my_table. Then logging into mysql, Dropping the test table and then recreating it, before logging out and performing the copy command again.
Triggers are stored on Information_Schema.Triggers table. Maybe that's why you cant duplicate them, maybe create a new one with a different name?
look here for more information
https://dev.mysql.com/doc/refman/8.0/en/faqs-triggers.html
Linux
mysqldump -u root -p mydatabase_live > mydatabase_dump.sql
mysqladmin create database_test
cat mydatabase_dump.sql | sed s/`mydatabase_live`/`database_test`/g | mysql -u root -p database_test
Windows
mysqldump -u root -p mydatabase_live > mydatabase_dump.sql
mysqladmin create database_test
type mydatabase_dump.sql | sed s/`mydatabase_live`/`database_test`/g | mysql -u root -p database_test
Notes
If you're in Windows, you'll need a windows version of sed (e.g. GnuWin32 sed)
I used a variation of several answers from a similar question at DBA Stack Exchange.
I'm using MySQL 5.7
mysqldump in 5.7 includes the database name when exporting triggers and views.
I put my password in an env var and passed it on the command line (i know, i'm bad, i get it). I mention it because I don't know what happens when you pipe data to the mysql executable and then it prompts for a password.
This question already has answers here:
how can I export mysql database using ssh?
(3 answers)
Closed 9 years ago.
I want to download mysql database from server using command prompt in windows.
I tried to use ssh to connect to the server.
But, it is not working. Is there any command to this?
Exporting MySQL Data
This example shows you how to export a database. It is a good idea to export your data often as a backup.
Using SSH, execute the following command:
mysqldump -p -u username database_name > dbname.sql
You will be prompted for a password, type in the password for the username and press Enter. Replace username, password and database_name with your MySQL username, password and database name.
The file dbname.sql now holds a backup of your database and is ready for download to your computer.
To export a single table from your database you would use the following command:
mysqldump -p --user=username database_name tableName > tableName.sql
Again you would need to replace the username, database and tableName with the correct information.
Once done the table specified would then be saved to your account as tableName.sql
Have a look Backup or Schema/Data Comparison tools in dbForge Studio for MySQL. Command line and conencting through secure SSH connections are supported.
I am trying to restore database from .sql file , i have created the database in phpmyadmin and also using the create if not exist command in the .sql file which i am restoring to the database and both names of database are same in phpmyadmin and .sql file which is"mydatabase".
Here is the command which i am using to restore database.
mysql -uroot -pmypassword mydatabase<mydatabase.sql;
When i execute the above command i am getting the following error, i have also given all the permission to the user upon this database.
ERROR 1049 (42000): Unknown database 'mydatabasename'
If dump file contains:
CREATE DATABASE mydatabasename;
USE mydatabasename;
You may just use in CLI:
mysql -uroot –pmypassword < mydatabase.sql
It works.
Whatever the name of your dump file, it's the content which does matter.
You need to check your mydatabase.sql and find this line :
USE mydatabasename;
This name does matter, and it's the one you must use in your command :
mysql -uroot -pmypassword mydatabasename<mydatabase.sql;
Two options for you :
Remove USE mydatabasename; in your dump, and keep using :
mysql -uroot -pmypassword mydatabase<mydatabase.sql;
Change your local database name to fit the one in your SQL dump, and use :
mysql -uroot -pmypassword mydatabasename<mydatabase.sql;
Open the sql file and comment out the line that tries to create the existing database and remove USE mydatabasename and try again.
You can also create a database named 'mydatabasename' and then try restoring it again.
Create a new database using MySQL CLI:
mysql -u[username] -p[password]
CREATE DATABASE mydatabasename;
Then try to restore your database:
mysql -u[username] -p[password] mydatabase<mydatabase.sql;
I solved because I have the same problem and I give you some clues:
1.- As #eggyal comments
mydatabase != mydatabasename
So, check your database name
2.- if in your file, you want create database, you can't set database that you not create yet:
mysql -uroot -pmypassword mydatabase<mydatabase.sql;
change it for:
mysql -uroot -pmypassword <mydatabase.sql;
Create database which gave error as Unknown database,
Login to mysql shell:
sudo mysql -u root -p
create database db_name;
Now try restoring database using .sql file, -p flag will ask for a sql user's password once command is executed.
sudo mysql -u root -p db_name < db_name.sql
La Chi's answer works for me.
You can view his/her answer in the comment of zessx answer in this page. But I initially have a problem with it if you also do just tweak his/her answer like this: mysql -h localhost -u root -p -D mydatabase < mydatabase.sql.
Also I would suggest that in the mydatabase.sql portion you include the direct location of it in your computer like "C:\Users\username\desktop".
Thank you.
If initially typed the name of the database incorrectly. Then did a Php artisan migrate .You will then receive an error message .Later even if fixed the name of the databese you need to turn off the server and restart server
I had the same issue, i run this command on command line and just like you i had added the ';' at the end. Removing it solved the issue.
Instead of this
mysql -uroot -pmypassword mydatabase<mydatabase.sql;
try this
mysql -uroot -pmypassword mydatabase<mydatabase.sql
I found these lines in one of the .sql files
"To connect with a manager that does not use port 3306, you must specify the port number:
$mysqli = new mysqli('127.0.0.0.1','user','password','database','3307');
or, in procedural terms:
$mysqli = mysqli_connect('127.0.0.0.1','user','password','database','3307');"
It resolved the error for me . So i will suggest must use port number while making connection to server to resolve the error 1049(unknown database).
mysql -uroot -psecret mysql < mydatabase.sql
I meet your issue. This is how to solve it
Check your DB name correct and exist in MySQL
Check if your IP and port is correct
It works by creating database and than typing command as :
C:\Program Files\MySQL\MySQL Server 8.0\bin>mysql -u root -p -D cricket < C:\Users\habib_s9ayvfl\Desktop\sqlfile.sql
Create database:
CREATE DATABASE mydatabasename;
USE mydatabasename;
use this one:
mysql -u root -p 'mydatabasename'< '/tmp/db_dump.sql'
Its very simple: Use mysql -u root -p mysql
first, you need to check the folder /var/lib/mysql for mydatabasename (depend on how you installed mysql, but default folder is this one),
please check the folder exists or not and its owner should be mysql:mysql, and of course the folder permission should be rw to mysql;
second, possibly because of you made changes to /etc/my.cnf, for example in my case, we created a database TEST_DB in uppercase, and then someone added lower_case_table_names=1 restriction in my.cnf, it caused the Unknown database error because mysql will transalte TEST_DB to lowercase test_db even when i key in select from TEST_DB, so it'll never find TEST_DB, simply comment out and restart mysql service solved my issue
You can also try
> mysql mysql
and you will connect to MySQL database from which you can create your own schema.
mysql> CREATE DATABASE mydb; USE mydb;
when u import database from workbench or other method ,should be give same name as your dump to avoid this kind of error
Normally I have database already created. So this command line works find:
mysql -h -u -p [databaseName] < dump.sql
I have an import.sql file that has a top query that creates the database, if it doesn't already exist.
Is there a way to import the sql file, but without needing to select a pre-existing database?
Invoke the commandline without specifying the database
mysql -h -u -p < dump.sql
inside dump.sql, after you create the database add
USE databasename;
While creating the dump file using mysqldump you can use the switch --add-drop-database. This will include a statement to drop the database first. So in the subsequent statement, a fresh database will be created since no database with the given name exists
See mysql documentation for more
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.