Search text from multiple mysql DBs on Linux Cpanel server

Hi,

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

BR
Javaid
LVL 2
Shamsul KamalJunior TechAsked:
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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
UNION
SELECT field1,field2 FROM Database_2.MyTable;

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0
Shamsul KamalJunior TechAuthor Commented:
Hi,

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 ?
0
Steve BinkCommented:
You can use a bash script.  Something like this:
#!/bin/bash
# credit to http://dba.stackexchange.com/questions/20240/running-sql-query-on-all-databases
# mysql credential 
user="root"
pass="root"

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

for db in $all_dbs
     do
        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');"
        fi
    fi  
     done

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You can also code the same thing into a stored procedure.
0

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