SQL medium question

Posted on 2010-09-13
Last Modified: 2012-06-27
First Table:
SSN, open_datetime, close_datetime, priority

Second Table:
ID, time, c_time, c_response, c_id

I need all the ssn, with an open date between 4/1/2010 and 4/30/2010, with a priority of 1 and need the c_response and time from table two.  Only problem is that second table has multiple records for the same c_id.  I need the first record of the second table based on c_id = SSN and c_time.

Question by:needplease

Accepted Solution

timexist earned 250 total points
ID: 33669121
two step process:
step one,
join them together and put the result into a temp table.
step two,
group them with a max(id) on temp table.
then you have your result.

If you can not finish a process in one step, try to do it in two, three, four....steps.
this is the key to be a master in sql script.

Expert Comment

ID: 33669282
try this query..

SELECT            f.SSN, f.open_datetime, f.close_datetime, Max(s.time) AS 'time', Max(c_response) AS 'response'
FROM            FirstTable f
INNER JOIN      SecondTable s ON s.c_id=f.SSN
WHERE            f.open_datetime between '4/1/2010' AND '4/30/2010' AND f.priority=1
GROUP BY       f.SSN, f.open_datetime, f.close_datetime

Expert Comment

by:Vipul Patel
ID: 33670618
below query might be helpful.

;WITH Level1
      SELECT f.SSN
                  ,ROW_NUMBER() OVER (PARTITION BY s.c_id ORDER BY s.c_time ASC) AS RowNumber
      FROM FirstTable f
      INNER JOIN SecondTable s ON s.c_id=f.SSN
      WHERE (f.open_datetime between '4/1/2010' AND '4/30/2010' AND f.priority=1)
SELECT * FROM Level1 WHERE RowNumber = 1

Author Comment

ID: 33673987
timexist, I would prefer in one query.

rushShah, I get the following error, "The text, ntext, and image data types are invalid in this subquery or aggregate expression".


Expert Comment

ID: 33674231
it means you can't use c_response or c_time in aggregate function text, ntext or image datatype..

so try this CTE query & let me know if still there is an error..




    SELECT          f.SSN, f.open_datetime, f.close_datetime, Max(s.ID) AS 'ID'

	FROM            FirstTable f

	INNER JOIN      SecondTable s ON s.c_id=f.SSN

	WHERE           f.open_datetime between '4/1/2010' AND '4/30/2010' AND f.priority=1

	GROUP BY		f.SSN, f.open_datetime, f.close_datetime


SELECT	c.SSN, c.open_datetime, c.close_datetime, s.time AS 'time', c_response AS 'response'


INNER JOIN SecondTable s ON c.ID=s.ID

Open in new window


Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Join vs where 2 38
SQL Statement to Update Email Domain 2 21
sql Total query 2 16
Sql Query Datatype 2 16
INTRODUCTION: While tying your database objects into builds and your enterprise source control system takes a third-party product (like Visual Studio Database Edition or Red-Gate's SQL Source Control), you can achieve some protection using a sing…
Data architecture is an important aspect in Software as a Service (SaaS) delivery model. This article is a study on the database of a single-tenant application that could be extended to support multiple tenants. The application is web-based develope…
This Micro Tutorial will give you a basic overview how to record your screen with Microsoft Expression Encoder. This program is still free and open for the public to download. This will be demonstrated using Microsoft Expression Encoder 4.
This is used to tweak the memory usage for your computer, it is used for servers more so than workstations but just be careful editing registry settings as it may cause irreversible results. I hold no responsibility for anything you do to the regist…

911 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

Need Help in Real-Time?

Connect with top rated Experts

17 Experts available now in Live!

Get 1:1 Help Now