Sorry if this is dumb question. I want to know if/how to import tables from one database to another using the mysql console/command line. I would love to speed up my workflow with Something like this
CREATE DATABASE dbname;
IMPORT tables into dbname
I have been creating a lot of databases locally using wamp and would like to easily create my database and import some WordPress tables using the command line. Thanks in advanced.
Use CREATE TABLE targetdb.tablename SELECT * FROM sourcedb.tablename to copy the table structure and its content from one database to another database.
Note that auto increment and indizes are not preserved, but can be added to the CREATE TABLE statement explicitly.
You can export one database and then can import that to another database.
mysqldump --host=hostip --user=username --password=password --database databasename > dump.sql
mysql --host=hostip --user=username --password=password databasename < dump.sql
Thanks
You should familiarize yourself with the use of the mysqldump tool (http://dev.mysql.com/doc/refman/5.5/en/mysqldump.html) and command line mysql usage
> mysqldump --no-create-db [DB name] > /path/to/file.sql
> mysql -h [hostname] -u [username] -p[password] [new db name] < /path/to/file.sql
Note here the use of the --no-create-db option, which will remove the CREATE DATABASE part of the SQL, allowing you to create the DB with new name.
Related
I'm facing the following:
We have a DB table of 11GB with over 257 million records and need a backup. Exporting via PHPmyAdmin isn't possible (chrome keeps crashing) and backing up with SSH mysqldump tablename will give a insufficient space disk error (error 28).
Now I'd like to know if there is a way to export a mysqldump with a row 0 till ~100.000.000 command so we can make 3 parts (or smaller parts if required).
What I'm using:
mysqldump -p -u username database_name database_table > dbname.sql
[EDIT]
Found out how to get a row of <50.0000.0000 to SQL with the following:
mysqldump -p -u db_name db_table --where='id<50000000'
But the big question remains now, how to go further? Now I want to get all records between 50.000.000 and 100.000.000 ..
Anybody knows the answer if it's possible and what command I should use?
Problem solved:
Part 1 (<50.000.000):
mysqldump -p -u db_name db_table --where='id<50000000' >part_1.sql
Part 2 (>50.000.000 till <100.0000.000):
mysqldump -p -u db_name db_table --where='id>=50000000 &&
id<100000000' >part_2.sql
Part last (>250.000.000)
mysqldump -p -u db_name db_table --where='id>250000000' >part_final.sql
And so on..
mysqldump creates a text file that contains sql statements, if want to take mysql backup in parts then you will have to run mysqldump like this
mysqldump --where "id%2=0" database_name table > table_even.sql
mysqldump --where "id%2=1" database_name table > table_odd.sql
OR
you need to write some program, script to achieve that
I found a nice solution for heavy transfers! This might also help you to avoid to transfer your database in parts (as in this example) - since it does this super fast:
Exporting a full database or in parts as mentioned using mysqldump:
mysqldump -p -u db_name db_table --where='id<50000000' >part_1.sql
To import to the new database - login via terminal to the new database:
mysql -h localhost -upotato -p123456
Enter the database:
USE databasename;
Use the source command:
source /path/to/file.sql;
This works X1000 faster than the standard:
mysql -h localhost_new -upotato -p1234567 table_name < /path/to/file.sql
Since you enter the database.
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
i googled a lot and i can't found nothing about it !
[root#someday backups]# mysql -u username_1 -p db_1 < tables_to_import/tables.sql
ERROR 1050 (42S01) at line 19: Table 'ps_customer' already exists
with mysql -f is the same. i wish simply import that .sql and rewrite that tables, can someone help me ?
p.s. i know that when you export a db you can choose option "DROP TABLE" but if i have a backup, without this declaration ? how can i force ? Thanks
When you do mysqldump add --add-drop-table (like twihoX mentioned). Then do your import as usual. So something like:
mysqldump --add-drop-table -u user -p db_1 > dumpfile.sql
mysql -u user -p db_1 < dumpfile.sql
Are you trying to overwrite the entirety of the database? If so, you could manually drop all the tables, and then run your import script. This is easy to do in phpmyadmin. If you're using the CLI, the fastest way would be to use DROP DATABASE databasename and then create database, though I think you'd then have to re-grant privileges for any non-root users.
Another option would be to open up your dump file and add DROP TABLE tablename before each of the CREATE TABLE commands. You could probably do this easily with some clever regex.
I'd suggest --add-drop-table option.
I know this question is a bit old and it's been marked as answered correctly, I'd just like to add this here for those (like me) who didn't use --add-drop-table when exporting.
What you can do is log in to MySQL and drop the tables that you plan to overwrite, then use --force on import.
So login to MySQL
mysql -h HOSTNAME - USERNAME -p
then tell mysql which database you wish to use
mysql> use DATABASE_NAME
drop tables that you want to overwrite
mysql> DROP TABLE my_images;
Then you are ready to import, so log out of mysql and back to where your SQL file was uploaded and run the following command
$ mysql --force -uDB_USER -p DB_NAME < myuploadedfile.sql
This will force MySQL to continue importing any new tables and ignore the 'table already exists error'
Is there a SQL command that 'resets' the database in MySQL?
By reset I mean, all rows are deleted and auto increment are reset.
You're looking for TRUNCATE, as in TRUNCATE TABLE mystuff
More info: http://dev.mysql.com/doc/refman/5.0/en/truncate-table.html
mysqldump -uuser -hhost -p --no-data name_of_database > backup_file_name.sql
The above command will keep the entire structure of your database but without the data. (that's what the --no-data param does).
Now when you want to reset your database you just:
mysql -uuser -hhost -p < backup_file_name.sql
View the .sql file created to see what its doing. There are a bunch of options you can add to the mysqldump command.
Enjoy.
The database "db" is backuped in backup.sql. Is there a way to restore database from script with different from "db" name?
thank you in advance!
Sure, when you import it you do this right:
mysql -uuser -ppassword databasename < mydump.sql
You can put anything you want where I wrote databasename - as long as that database actually exists :)
This depends on how you created your MySQL dB dump file
for example, if you do
mysqldump -h localhost -u user mydb -pXXX > mydb.sql
There won't be any CREATE DATABASE statements in your sql dump file. But I think you can only backup one database.
If you create your mysql dump file with --database or --all-databases option
for example
mysqldump -h localhost -u user --database mydb -pXXX > mydb.sql
mysqldump -h localhost -u user --all-databases -pXXX > alldb.sql
then you will see CREATE DATABASE statement in your mysql dump file. If you want a different dB name, you will need to change it before DB restore.
If the name of the database is include the SQL file, I didn't find any other way than modify the SQL file.
My favorite command to do it :
sed -i "s/\`old_db_name\`/\`new_db_name\`/g" my_sql_file.sql
Open up the .sql file and change the database name inside.
You can use a text editor, like Notepad or gedit.