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Editorial Team
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Asked: 2026-05-12T12:02:20+00:00

I have a VB app that accesses a sql database. I think it’s running

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I have a VB app that accesses a sql database. I think it’s running slow, and I thought maybe I didn’t have the tables propery indexed. I was wondering how you would create the indexes? Here’s the situation.

My main loop is

Select * from Docrec 
Order by YearFiled,DocNumb

Inside this loop I have two others databases hits.

Select * from Names 
Where YearFiled = DocRec.YearFiled 
and Volume = DocRec.Volume and Page = DocRec.Page  
Order by SeqNumb



Select * from MapRec
Where FiledYear = DocRec.YearFiled 
and Volume = DocRec.Volume and Page = DocRec.Page 
Order by SeqNumb

Hopefully I made sense.

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1 Answer

  1. Editorial Team

    In general looping through records is a poor idea. can you not do a set-based query that gives you everything you need in one pass?

    As far as indexing consider any fields that you use in the ordering or where clauses and any fileds that arein joins. Primary keys are indexed as part of the setup of a primary ley but foreign keys are not. Often people forget that they need to index them as well.

    Never use select * in a production environment. It is a poor practice. Do not ever return more data than you need.

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