Search text from multiple mysql DBs on Linux Cpanel server


I've  a Linux server with Cpanel installed on it, I want to know how to search text from multiple mysql databases at once.

Shamsul KamalJunior TechAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Steve BinkCommented:
Can you explain a little more about what you are trying to accomplish?

The basics of querying multiple databases is to use the UNION operator:
SELECT field1,field2 FROM Database_1.MyTable
SELECT field1,field2 FROM Database_2.MyTable;

Open in new window

Shamsul KamalJunior TechAuthor Commented:

Let say, I've 100 Mysql DBs on my CentOS server, want to search text "abc" & replace with "xyz" in all DBs at once, how it can be possible ?
Steve BinkCommented:
You can use a bash script.  Something like this:
# credit to
# mysql credential 

# list of all databases
all_dbs="$(mysql -u $user -p$pass -Bse 'show databases')"        

for db in $all_dbs
        if test $db != "information_schema" 
            then if test $db != "mysql" 
            then mysql -u$user -p$pass $db -sN -e "UPDATE mytable SET myfield=REPLACE(myfield,'abc','xyz');"

Open in new window

You can also code the same thing into a stored procedure.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
MySQL Server

From novice to tech pro — start learning today.