Search for all occurrences of a string in a mysql database

A simple solution would be doing something like this:

mysqldump -u myuser --no-create-info --extended-insert=FALSE databasename | grep -i "<search string>"

In phpMyAdmin a 'Search' feature is available:

1. Select particular database not table.
2. Click 'Search' tab
3. Enter the search term you want
4. Select the tables you want to search in

phpMyAdmin screen shot:

The 'Search' feature is also available in MySQL Workbench:

1. Database Menu > Search Table Data
2. Select database and tables you want to search (it will search in selected tables only)
3. In search you can use wildChars.

MySQL Workbench screen shot: