SQL Select Query Help

Question

0.00/5 (No votes)

See more:

SQL-Server-2008

Hi guys,

Hope someone can help me. I have a Database table with the following data in

company site building camera cameraentry cameraname valid
1       1     1       1      1           CAM A      0
1       1     1       2      1           CAM B      0
1       1     1       1      2           CAM C      0

What I need is to get all the cameranames per camera for valid 0, but I need the name of the max cameraentry

So in my results will read:

CAM B
CAM C

Thanks in advance.

Posted 9-May-12 3:55am

Member 8287316

Updated 9-May-12 4:03am

Manfred Rudolf Bihy

v2

Add a Solution

Comments

Corporal Agarn 9-May-12 9:57am

What have you tried so far?

[no name] 9-May-12 10:26am

You could select everything and then read out every dataset that has valid = 0. (Well, not the entire Dataset, since you only want the name) Although I'd not recommend that.

You should try to select what you need and nothing more. (Select the row you want the value from and only select datasets where valid = 0, as you stated)

These links should help you find the solution: (It's quite easy)
SQL SELECT Statement[^]
SQL WHERE Clause[^]

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)

Wendelius · Answer 1 · 2012-05-09T08:34:00

If I understood the question correctly, you could try something like:

SQL

SELECT *
FROM   YourTableName A
WHERE  A.Valid = 0
AND    A.CameraEntry = (SELECT MAX(B.CameraEntry)
                        FROM   YourTableName B
                        WHERE   B.Valid = 0)

Note that the query above can return several rows if the same value can be repeated in CameraEntry