How do I include NULL values into WHERE condition

Question

0.00/5 (No votes)

See more:

Hi,

I am trying to retrieve all values using the column name in the Where condition: I have my reasons using this method (this question is to help answer my errors not my actual codes) :

SQL

SELECT *
FROM Table1
WHERE Column1 IN (Column1)

The problem is it does not take in NULL values in column 1 during return. How do I take in NULL values as well?

Posted 6-Oct-15 23:47pm

waynetan123

Add a Solution

Comments

[no name] 7-Oct-15 6:00am

Maybe you mean?
SELECT *
FROM Table1
WHERE Column1 IN ('a', 'b', 'c') OR Column1 IS NULL

3 solutions

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)

F-ES Sitecore · Accepted Answer · 2015-10-06T23:55:00

Solution 1

That query makes no sense, however if you want to check for nulls

SQL

select fieldlist from table where somefield is null

or to ignore nulls

SQL

select fieldlist from table where somefield is not null

Posted 6-Oct-15 23:55pm

F-ES Sitecore

Naveen.Sanagasetti · Accepted Answer · 2015-10-07T00:02:00

Solution 2

This is the sample for your requirement; refer this and implement the same in your requirement.

SQL

declare @tab table
(
	Id int,
	name varchar(100)
)

insert into @tab
values (1,'n'),(2,'d'),(3,null),(4,'g'),(5,null)

select * from @tab
where name in ('n','d') or name is null

Posted 7-Oct-15 0:02am

Naveen.Sanagasetti

Member 12039005 · Accepted Answer · 2015-10-07T01:54:00

Solution 3

SELECT *
FROM TableA
WHERE Col1 IN ('a','b','c')

UNION ALL

SELECT *
FROM TableA
WHERE Col1 IS NULL

Posted 7-Oct-15 1:54am

Member 12039005