crystal reports performance issue

Question

I have report getting data from MySQL and Oracle.I developed the report and my report is running with poor performance. Somebody suggested me to use db links between MySQL and oracle to pull columns from oracle into MySQL. What will happen if use db link.Will it improves performance Please sugggest

Answer 1

You should post some info to get help: number of rows and columns involved, structure of the query.

Anyway some suggestions:
- not to filter in the report, but filter passing parameters to the query, when possible
- not to group in the report but group in the query when possible
- use indexes in the DB to speed up queries
- exclude fields not used in the report