Sql server where condition based on selected case column

Question

1.00/5 (2 votes)

See more:

SQL-Server-2012

How to write sql where condition based on column selected in case statement.

What I have tried:

I am selecting columns based on case statement and want to filter with where clause based on selected column in case statement.

Posted 19-Dec-16 11:58am

dgnr

Updated 23-Apr-18 20:06pm

Add a Solution

Comments

Wendelius 19-Dec-16 18:21pm

Can you provide an example situation

dgnr 19-Dec-16 18:41pm

Select case when UpdatedDate is not null then UpdatedDate when InsertedDate is not null then InsertedDate else VisitedDate end
From tbl_UserTracking
where [UpdatedDate/InsertedDate/VisitedDate(based on case)] between date1 and date2

-- Where condition should be based on column selected from case statement.

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)

Wendelius · Answer 1 · 2016-12-19T17:35:00

If I understand the description correctly, you could use CASE in the where clause, like

SQL

...
WHERE date1 <= CASE WHEN ...
AND   date2 >= CASE WHEN ...
...

But since you just want the first non null value from different fields, I believe using COALESCE (Transact-SQL)[^] would be easier, something like

SQL

SELECT COALESCE(UpdatedDate, InsertedDate, VisitedDate)
FROM tbl_UserTracking
WHERE COALESCE(UpdatedDate, InsertedDate, VisitedDate) BETWEEN date1 AND date2

Kevin Marois · Answer 2 · 2016-12-19T12:08:00

Solution 1

See this[^]

Posted 19-Dec-16 12:08pm

Kevin Marois

Advay Pandya · Answer 3 · 2016-12-21T01:31:00

You can use IsNULL in this case.

So your query will look as below:

SQL

Select case when UpdatedDate is not null then UpdatedDate when InsertedDate is not null then InsertedDate else VisitedDate end
From tbl_UserTracking
where Isnull(UpdatedDate,Isnull(InsertedDate,VisitedDate)) between date1 and date2

Please let me know if you have any concern or query or if you are still facing issue.

Sql server where condition based on selected case column

3 solutions

Solution 2

Solution 1

Solution 3

Add your solution here

Preview 0