Yes, indexes can help the performance of some SELECT statements, provided you have the proper indexes in place for the query optimizer to use.
To get a better understanding of how DB2 for i5/OS can utilize indexes to improve performance, I'd strongly recommending reading the Indexing & Statistics Strategy white paper online.
Dig deeper on i5-OS
Related Q&A from Kent Milligan
To solve the SQL error -321 on IBM i6.1, use the new values statement to overcome the error. If you are using an older release, declare a cursor ...continue reading
When working with DB2 files with columns that have both short and long names, there is no option choose which column names are returned via ODBC ...continue reading
When developing tables in a parent-child relationship, use a primary key and a foreign key along with a unique ID to make your database easier to ...continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.