Now days everything is stored in database in XML format and sometimes changing anything in that long text field is tedious and time consuming. In MySQl there is tiny SQLscript that can do automatically for you. This will find the string that you are looking and then replace with string of your choice. Here is the sample SQL script.
update [table_name] set [field_name] = replace([field_name],'[string_to_find]','[string_to_replace]');
Code the SQL Script:
set company = replace (company, 'Missing Info', 'Steel Corp.');