I want to dump mysql database only the tables which have data, Can u please give me your suggestion. this is more helpful
Thanks & Regards,
Vara Kumar.PJD
You can use the --ignore-table option, but you have to find out which tables are empty first as this is not directly possible with mysqldump. So you could do
mysqldump -u username -p database --ignore-table=database.table1 --ignore-table=database.table2 > database.sql
mysqldump <database options> table1 table2 table3 ...
Use mysqldump (documentation located here). If you do not specify tables it assumes all tables. You can also explicitly choose tables to copy or to ignore. You can tell it to create drop statements before your create statements. If you have mysql 5.1.2 then you can tell it to copy routines.
When you are dumping all database. Obviously it is having large data. So you can prefer below for better:
Creating Backup:
mysqldump -u [user] -p[password]--single-transaction --quick --all-databases | gzip > alldb.sql.gz
If error
-- Warning: Skipping the data of table mysql.event. Specify the --events option explicitly.
Use:
mysqldump -u [user] -p --events --single-transaction --quick --all-databases | gzip > alldb.sql.gz
Restoring Backup:
gunzip < alldb.sql.gz | mysql -u [user] -p[password]
Hope it will help :)
Related
I am trying to empty the database of any data, while keeping the relationships and tables as they are
I have no idea if my thinking is right or wrong
Yes, you just run mysqldump with --no-data
mysqldump --no-data -u someuser -p mydatabase
You can save it to a .sql file and then drop your database
Then you restore it from the dump
truncate table_name;
table_name is the table you want to delete all data in it.
truncate only works on tables, so you need to execute truncate table one by one.
Use truncate to all table :
mysqldump -d -uuser -ppass --add-drop-table databasename > databasename.sql
mysql -uuser -ppass databasename < databasename.sql
or you can read this, similar problem.
Normally, when I backup the database, I run a command like this:
mysqldump -uuser -p -hhost -Ddatabase > C:\TEMP\db_2018-04-05.sql
Inside that file, there are DROP table statements. This is normally fine, but I've modified my localhost to have a different schema than the production database.
If I execute this file, it will blow away the important changes to the database schema on my localhost.
All I need is the INSERT statements. Is there any flag I can pass mysqldump to achieve this?
Include the command for the mysqldump ignore the structure.
mysqldump --no-create-info ...
All you need is add --skip-add-drop-table option when using mysqldump.
$ mysqldump -uuser -p -hhost -Ddatabase --skip-add-drop-table > C:\TEMP\db_2018-04-05.sql
Now no DROP TABLE IF EXISTS in SQL files.
see docs of mysql on --skip-add-drop-table.
this is probably massively simple, however I will be doing this for a live server and don't want to mess it up.
Can someone please let me know how I can do a mysqldump of all databases, procedures, triggers etc except the mysql and performance_schema databases?
Yes, you can dump several schemas at the same time :
mysqldump --user=[USER] --password=[PASS] --host=[HOST] --databases mydb1 mydb2 mydb3 [...] --routines > dumpfile.sql
OR
mysqldump --user=[USER] --password=[p --host=[HOST] --all-databases --routines > dumpfile.sql
concerning the last command, if you don't want to dump performance_schema (EDIT: as mentioned by #Barranka, by default mysqldump won't dump it), mysql, phpMyAdmin schema, etc. you just need to ensure that [USER] can't access them.
As stated in the reference manual:
mysqldump does not dump the INFORMATION_SCHEMA or performance_schema database by default. To dump either of these, name it explicitly on the command line and also use the --skip-lock-tables option. You can also name them with the --databases option.
So that takes care of your concern about dumping those databases.
Now, to dump all databases, I think you should do something like this:
mysqldump -h Host -u User -pPassword -A -R > very_big_dump.sql
To test it without dumping all data, you can add the -d flag to dump only database, table (and routine) definitions with no data.
As mentioned by Basile in his answer, the easiest way to ommit dumping the mysql database is to invoke mysqldump with a user that does not have access to it. So the punch line is: use or create a user that has access only to the databases you mean to dump.
There's no option in mysqldump that you could use to filter the databases list, but you can run two commands:
# DATABASES=$(mysql -N -B -e "SHOW DATABASES" | grep -Ev '(mysql|performance_schema)')
# mysqldump -B $DATABASES
What is the best practice for backing up MySQL InnoDB tables? (for myisam I use backuppc)
How can I do a backup and how can I restore it?
Thank you.
mysql> mysqldump -u username -ppassword databasename tablename > Path
to save
you can schedule in in windows scheduler or in cron job after creating the batch file or SH file.
You can use 'mysqldump' program from MySQL to dump individual tables..
shell> mysqldump [options] [tbl_name ...]
To restore the tables use command:
shell>mysql -uusername -ppassword -f -D databasename < /path/to/file/dbbackup.sql
I am looking for the syntax for dumping all data in my mysql database. I don't want any table information.
mysqldump --no-create-info ...
Also you may use:
--skip-triggers: if you are using triggers
--no-create-db: if you are using --databases ... option
--compact: if you want to get rid of extra comments
This should work:
# To export to file (data only)
mysqldump -u [user] -p[pass] --no-create-info mydb > mydb.sql
# To export to file (structure only)
mysqldump -u [user] -p[pass] --no-data mydb > mydb.sql
# To import to database
mysql -u [user] -p[pass] mydb < mydb.sql
NOTE: there's no space between -p & [pass]
If you just want the INSERT queries, use the following:
mysqldump --skip-triggers --compact --no-create-info
>> man -k mysqldump [enter in the terminal]
you will find the below explanation
--no-create-info, -t
Do not write CREATE TABLE statements that re-create each dumped table.
Note This option does not not exclude statements creating log file
groups or tablespaces from mysqldump output; however, you can use the
--no-tablespaces option for this purpose.
--no-data, -d
Do not write any table row information (that is, do not dump table
contents). This is useful if you want to dump only the CREATE TABLE
statement for the table (for example, to create an empty copy of the
table by loading the dump file).
# To export to file (data only)
mysqldump -t -u [user] -p[pass] -t mydb > mydb_data.sql
# To export to file (structure only)
mysqldump -d -u [user] -p[pass] -d mydb > mydb_structure.sql
Best to dump to a compressed file
mysqldump --no-create-info -u username -hhostname -p dbname | gzip > /backupsql.gz
and to restore using pv apt-get install pv to monitor progress
pv backupsql.gz | gunzip | mysql -uusername -hhostip -p dbname
Would suggest using the following snippet. Works fine even with huge tables (otherwise you'd open dump in editor and strip unneeded stuff, right? ;)
mysqldump --no-create-info --skip-triggers --extended-insert --lock-tables --quick DB TABLE > dump.sql
At least mysql 5.x required, but who runs old stuff nowadays.. :)
Just dump the data in delimited-text format.
Try to dump to a delimited file.
mysqldump -u [username] -p -t -T/path/to/directory [database] --fields-enclosed-by=\" --fields-terminated-by=,
When attempting to export data using the accepted answer I got an error:
ERROR 1235 (42000) at line 3367: This version of MySQL doesn't yet support 'multiple triggers with the same action time and event for one table'
As mentioned above:
mysqldump --no-create-info
Will export the data but it will also export the create trigger statements. If like me your outputting database structure (which also includes triggers) with one command and then using the above command to get the data you should also use '--skip-triggers'.
So if you want JUST the data:
mysqldump --no-create-info --skip-triggers