Solved

Select records based on a passed parameter in the WHERE clause

Posted on 2014-09-06
2
120 Views
Last Modified: 2014-09-07
I'm looking for the proper syntax to use in a WHERE clause.  I'm pulling data from a non-normalized table that is used for reporting purposes, and I only want to pull those records where the IgnoreXXX field for the particular product = 0.

The syntax below seems to be working properly, but I'm just looking for either confirmation that this would be the preferred syntax, or a better syntax if there is one.
SELECT P1.Prod_ID
, P1.Entity_ID
, P1.docDate 
, Vol = Case WHEN @Product = 'Gas' THEN P1.Gas
             WHEN @Product = 'Oil' THEN P1.Oil
             WHEN @Product = 'Water' THEN P1.Water
             Else NULL End
, Ignore = Case When @Product = 'Gas' THEN P1.IgnoreGas
             WHEN @Product = 'Oil' THEN P1.IgnoreOil
             WHEN @Product = 'Water' THEN P1.IgnoreWater
             ELSE NULL End
FROM tbl_sysProduction as P1
WHERE (CASE WHEN @Product = 'Gas' Then P1.IgnoreGas
            WHEN @Product = 'Oil' THEN P1.IgnoreOil
            WHEN @Product = 'Water' THEN P1.IgnoreWater
            ELSE 0 END) = 0

Open in new window

0
Comment
Question by:Dale Fye (Access MVP)
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 65

Accepted Solution

by:
Jim Horn earned 500 total points
ID: 40308195
If that works for you then go for it, otherwise...

WHERE (@product = 'Gas' AND p1.IgnoreGas = 0) OR
   (@product='Oil' AND P1.IgnoreOir = 0) OR
   (@Product='Water AND P1.IgnoreWater = 0) OR
   (@Product NOT IN ('Gas', 'Oil', 'Water')
0
 
LVL 48

Author Closing Comment

by:Dale Fye (Access MVP)
ID: 40308423
Thanks, Jim.

I like your version.
0

Featured Post

Instantly Create Instructional Tutorials

Contextual Guidance at the moment of need helps your employees adopt to new software or processes instantly. Boost knowledge retention and employee engagement step-by-step with one easy solution.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Ever needed a SQL 2008 Database replicated/mirrored/log shipped on another server but you can't take the downtime inflicted by initial snapshot or disconnect while T-logs are restored or mirror applied? You can use SQL Server Initialize from Backup…
This article shows gives you an overview on SQL Server 2016 row level security. You will also get to know the usages of row-level-security and how it works
This video shows how to set up a shell script to accept a positional parameter when called, pass that to a SQL script, accept the output from the statement back and then manipulate it in the Shell.
Viewers will learn how the fundamental information of how to create a table.

751 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question