We help IT Professionals succeed at work.
Get Started

Basic SQL Query Select Question FK tables

sbornstein2 asked
Last Modified: 2016-02-08
Hello all,

Okay this is a basic question but want the best practice.   If I have a FK ID field in my main query FROM table that joins to that PK table.    I know it does not matter but best practice the ID field should that reference the main FROM table or the joined PF table.   For example,

IV.InvoiceGroupID,   --should this use the main table InvoiceGroupID or the IG table best practice
FROM Invoice IV
JOIN InvoiceGroup IG ON IV. InvoiceGroupID = IG.InvoiceGroupID

Also one other thing is the JOIN which table should always be the first in the ON statement?   Sometimes I find myself mixing them.

Again all best practice I am looking for.

Thanks all
Watch Question
Senior DBA
Most Valuable Expert 2018
Distinguished Expert 2019
This problem has been solved!
Unlock 1 Answer and 5 Comments.
See Answer
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE