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I'm trying to import a gzipped SQL file into mysql directly. Is this the right way?

mysql -uroot -ppassword mydb > myfile.sql.gz
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4 Answers 4

up vote 59 down vote accepted

zcat /path/to/file.sql.gz | mysql -u 'root' -p'password' your_database

> will write the output of the mysql command on stdout into the file myfile.sql.gz which is most probably not what you want.

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As a good security practice, I would put my password on the command line, I would let mysql ask for it. – Prof. Moriarty May 3 '10 at 8:19
Or even better: create ~/.my.cnf with the credentials. ;) – joschi May 3 '10 at 10:46
As @Prof. Moriarty explans, you can modify the command to not use the password via zcat /path/to/file.sql.gz | mysql -u 'root' -p your_database. It will know the last parameter is the database you wish to use, not your password. – bafromca Jan 20 at 0:20

The simplest way is to unzip the database file before importing. Also as mentioned by @Prof. Moriarty you shouldn't be specifying the password in the command (you'll be asked for the password). This command taken from webcheatsheet will unzip and import the database in one go:

gunzip < myfile.sql.gz | mysql -u root -p mydb

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Also, mydb needs to be created before importing. This doesn't create the db for you. – Siddhartha Apr 20 at 23:00

To display a progress bar while importing a sql.gz file, download pv and use the following:

pv mydump.sql.gz | gunzip | mysql -u root -p

In CentOS/RHEL, you can install pv with yum install pv.

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pv seems to be in the Ubuntu repos too (at least in 12.04 LTS it is), but again you need to do sudo apt-get install pv to get it. Thanks Banjer, this is perfect for big database imports! – toon81 Feb 19 at 15:25

Also check if there is any USE-statement in the SQL file. Specifying the database at the command line doesn't guarantee that the data ends up there if a different destination is specified within the SQL file.

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You just need to extend the command like so: pv mydump.sql.gz | gunzip | mysql -u root -p your_database. The accepted answer uses this approach. – bafromca Jan 20 at 0:17

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