How to use isnull condition in C# using sqlserver

Question

1.00/5 (2 votes)

See more:

sir,

i have using c# . i have familier with oracle.but littile knowledge in C# with sqlserver. i have used to nvl function in oracle in user input data variable.
but isnull work with table columns is fien but not in variable.please help me
thanks in advance

What I have tried:

select * from table where handwheel = isnull(isnull('',null),'NA') ,here '' means variable is blank

Posted 18-Oct-16 1:16am

forest4ever

Updated 18-Oct-16 2:02am

Add a Solution

Comments

ZurdoDev 18-Oct-16 7:55am

You don't have a variable. I don't understand what you are asking. IsNull is very easy to use.

SELECT * FROM table WHERE handwheel = IsNull(@someVariable, 'valueVarisNull')

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Dave Kreskowiak · Answer 1 · 2016-10-18T02:02:00

Solution 1

It's not entirely clear what you're having a problem with but in the case of your SELECT statement:

SELECT fieldlist FROM table WHERE handwheel IS NULL OR handwheel = 'NA'

seems to fit what you posted.

Try reading the documentation on SQL Server TSQL next time.

Posted 18-Oct-16 2:02am

Dave Kreskowiak