Thursday, April 21, 2011

How do you run a single query through mysql from the command line?

I'm looking to be able to run a single query on a remote server in a scripted task.

For example, intuitively, I would imagine it would go something like:

mysql -uroot -p -hslavedb.mydomain.com mydb_production "select * from users;"
From stackoverflow
  • echo "select * from users;" | mysql -uroot -p -hslavedb.mydomain.com mydb_production
    
  • mysql -u <user> -p -e "select * from schema.table"
    
  • mysql -uroot -p -hslavedb.mydomain.com mydb_production -e "select * from users;"
    

    From the usage printout:

    -e, --execute=name
    Execute command and quit. (Disables --force and history file)

  • here's how you can do it with a cool shell trick:

    mysql -uroot -p -hslavedb.mydomain.com mydb_production <<< 'select * from users'
    

    '<<<' instructs the shell to take whatever follows it as stdin, similar to piping from echo.

    use the -t flag to enable table-format output

  • If it's a query you run often, you can store it in a file. Then any time you want to run it:

    mysql < thefile
    

    (with all the login and database flags of course)

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