find and replace is the solution

on one campus, many students have.
each student has a student ID.
consider the number of students over 5000 people.
for a design job requires a long time
because:
1. file that is too much, use a heavy application ..
2. if there is a change file for one student than 5000 students, his quest takes a lot.
few solutions to you, which may help a little use of time in this work.
1. file that is too much of an impact on the application, so it's good existing file is divided into several groups. for example, one group of students there are 50 files.
2. in file search, use this trick, go to edit - find and replace - find text, type the name or identity of the data you are looking for.