We help IT Professionals succeed at work.
Get Started

T-SQL: Why does "select null or 1" elicit a syntax error?

437 Views
Last Modified: 2012-08-13
I'm trying to manually test to see if part of my WHERE clause will work correctly:
... and (ColA=1 or ColB is null) ...
and it's likely that ColA will be null.

Question: HOW can I test this MANUALLY "at the console" with a simple select statement?

I tried something like this and doesn't work... it returns a syntax error:
select null or 1
to illustrate ColA being null and ColB NOT being null.   I want to "prove" this will evaluate TRUE (null or TRUE => TRUE).
Comment
Watch Question
CERTIFIED EXPERT
Expert of the Quarter 2010
Expert of the Year 2010
Commented:
This problem has been solved!
Unlock 1 Answer and 3 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