Question

this is server_var_dump row one output http://pastebin.com/e1qHG64Q
now how do I query to get just the HTTP_USER_AGENT line and save it in separate field?
I have done this with php script but I want to do it with mysql query so that it will be fast because the database is huge.

Answer 1

Something like this?

UPDATE your_table
SET user_agent = SUBSTR(server_var_dump, 
        @p, INSTR(SUBSTR(server_var_dump, @p, 100), "\n")-1)
WHERE @p := INSTR(server_var_dump,'[HTTP_USER_AGENT]')+21;