Solved

How to reference the primary table in a nested select in an Update statement

Posted on 2008-10-24
3
299 Views
Last Modified: 2013-12-07
I'm getting the following error when trying to run the attached Update statement.   It occurs on the line in the nested selects that reference the DT.taskorder field.  

Can anyone help?

PL/SQL:  ORA-00904: "DT"."TaskOrder": invalid identifier.

UPDATE go.Tasks DT
SET	StartDate = 
	(Select startdate from 
		(select startdate 
		from go.Tasks X 
		where X.ePHPID 	= p_ePHPID 
		and X.Method 	= p_Method 
		and X.TaskOrder	= DT.taskorder 
		and X.Subtask 	= 'N' 
		order by X.taskorder)
	Where RowNum = 1),
	EndDate =
	(Select endDate from 
	         (Select endDate 
                                  from go.Tasks W
		where W.ePHPID 	= p_ePHPID 
		and W.method 	= p_Method 
		and W.TaskOrder	= DT.taskorder 
		and W.Subtask	= 'N'  
		order by W.taskorder),
	Where rowNum = 1)
where ePHPID = p_ePHPID 
and Method = p_Method 
and Subtask = 'Y';

Open in new window

0
Comment
Question by:sgrzesik
3 Comments
 
LVL 5

Expert Comment

by:jfmador
ID: 22798449
Hello sorry I don't know much oracle but I you are defining twice your query, Under SQL Server i would give a try to something like this


update Tasks
SET Tasks.StartDate = t.StartDate, Tasks.EndDate = t.EndDate
from Tasks inner join
(
	Select TasksOrder, min(startdate) as startdate, min(endDate) as enddate  
	FROM go.Tasks x
	inner join go.Tasks dt on x.TaskOrder = dt.TaskOrder and x.EPHPID = dt.EPHPID AND x.Method = dt.Method
	where X.ePHPID 	= p_ePHPID 
	and X.Method 	= p_Method 
	and X.Subtask 	= 'N' 
	AND dt.subtask  = 'Y'
	GROUP BY TasksOrder
) t on Tasks.TasksOrder = t.TasksOrder

Open in new window

0
 
LVL 9

Accepted Solution

by:
MarkusId earned 500 total points
ID: 22798604
Hi!

As far as I know it was not possible (at least until version 9) to reference an external column in a nested select. So you might this give a try:
UPDATE go.Tasks DT
SET     StartDate = 
        (Select startdate from 
                (select startdate, X.TaskOrder
                from go.Tasks X 
                where X.ePHPID  = p_ePHPID 
                and X.Method    = p_Method 
                and X.Subtask   = 'N' 
                order by X.taskorder) x
        Where x.taskOrder = dt.taskorder
        and   RowNum = 1),
        EndDate =
        (Select endDate from 
                 (Select endDate, x.TaskOrder
                                  from go.Tasks W
                where W.ePHPID  = p_ePHPID 
                and W.method    = p_Method 
                and W.Subtask   = 'N'  
                order by W.taskorder) w
        Where w.taskorder = dt.taskorder
          and rowNum = 1)
where ePHPID = p_ePHPID 
and Method = p_Method 
and Subtask = 'Y';

Open in new window

0
 

Author Comment

by:sgrzesik
ID: 22799145
That works, thanks!
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

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

Suggested Solutions

Working with Network Access Control Lists in Oracle 11g (part 1) Part 2: http://www.e-e.com/A_9074.html So, you upgraded to a shiny new 11g database and all of a sudden every program that used UTL_MAIL, UTL_SMTP, UTL_TCP, UTL_HTTP or any oth…
I remember the day when someone asked me to create a user for an application developement. The user should be able to create views and materialized views and, so, I used the following syntax: (CODE) This way, I guessed, I would ensure that use…
This video shows how to copy a database user from one database to another user DBMS_METADATA.  It also shows how to copy a user's permissions and discusses password hash differences between Oracle 10g and 11g.
Video by: Steve
Using examples as well as descriptions, step through each of the common simple join types, explaining differences in syntax, differences in expected outputs and showing how the queries run along with the actual outputs based upon a simple set of dem…

770 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