Solved

Delete SQL query

Posted on 2006-11-14
8
259 Views
Last Modified: 2010-05-18
I have an SQL database with two tables. The one stores homework IDs and the students that homewoek has been assigned to. The other contains a list of students and their classes:

tblHomework
=========
Homework_ID
Student_ID

tblStudents
=======
Student_ID
Class_ID

tblHomework.Student_ID is linked to tblStudents.Student_ID

I need an SQL query that will delete all rows in tblHomework that contain a specific homework (lets say Homework_ID = 1) and which is assigned to students from a specific class (lets say Class_ID = 2). In other words, something like: DELETE * FROM tblHomework WHERE Homework_ID = 1 AND STUDENT IN Class_ID = 2

Any ideas? I'm battling to get it to work.

Thanks
0
Comment
Question by:SETP
[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
8 Comments
 
LVL 43

Expert Comment

by:TimCottee
ID: 17937542
Hi SETP,

Delete From tblHomework H Inner Join tblStudents S On H.Student_ID = S.[ID] Where H.Homework_ID = 1 And S.Class_ID = 2

Should do it.

Tim Cottee
0
 
LVL 6

Expert Comment

by:badalpatel
ID: 17938060
u try this query..
this will solve ur problem within a second...
enjoyyyyyy

delete tblHomework from tblHomework,tblStudents where tblHomework = tblStudents.[ID] and H.Homework_ID = 1 And S.Class_ID = 2

cheerssss
0
 
LVL 5

Expert Comment

by:prajapati84
ID: 17938120
Try this one...

delete tblHomework from tblHomework h,tblStudents s where h.Student_ID = s.[ID] and h.Homework_ID = 1 And s.Class_ID = 2

Regards,
Mukesh
0
Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 5

Accepted Solution

by:
prajapati84 earned 500 total points
ID: 17938143
Sorry, Try this one...

delete tblHomework from tblHomework h,tblStudents s where h.Student_ID = s.Student_ID and h.Homework_ID = 1 And s.Class_ID = 2

Regards,
Mukesh
0
 
LVL 3

Expert Comment

by:jay_gadhavi
ID: 17938151
The perfect Solution ,Above all the quaries are run by me and there are all contains the syntex errors.

Try this , i run it in my quary analyzer

delete h from tblhomework h inner join tblstudents s on h.student_id=s.student_id
where H.Homework_ID = 1 And S.Class_ID = 2
0
 
LVL 3

Expert Comment

by:jay_gadhavi
ID: 17938156
Enjoy
0
 
LVL 8

Expert Comment

by:thrill_house
ID: 17938166
Delete From tblHomework
Where Homework_ID = 1 and StudentID in (select StudentID from tblStudents where Class_ID = 2)


That's how I'd do it.
0
 

Author Comment

by:SETP
ID: 17938346
Thanks for all your replies.

TimCottee, I get the following error message with your solution:
    Incorrect syntax near 'H'

badalpatel, I get the following error message with your solution:
    Msg 107, Level 16, State 2, Procedure proc_Delete_Assessment_Assignment_Per_Class, Line 18
    The column prefix 'H' does not match with a table name or alias name used in the query.
    Msg 107, Level 16, State 2, Procedure proc_Delete_Assessment_Assignment_Per_Class, Line 18
    The column prefix 'S' does not match with a table name or alias name used in the query.

prajapati84, yours worked!

jay_gadhavi and thrill_house, I didn't try yours since prajapati84's solution worked.
0

Featured Post

[Webinar] How Hackers Steal Your Credentials

Do You Know How Hackers Steal Your Credentials? Join us and Skyport Systems to learn how hackers steal your credentials and why Active Directory must be secure to stop them. Thursday, July 13, 2017 10:00 A.M. PDT

Question has a verified solution.

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

Today is the age of broadband.  More and more people are going this route determined to experience the web and it’s multitude of services as quickly and painlessly as possible. Coupled with the move to broadband, people are experiencing the web via …
IntroductionWhile developing web applications, a single page might contain many regions and each region might contain many number of controls with the capability to perform  postback. Many times you might need to perform some action on an ASP.NET po…
In this video, viewers will be given step by step instructions on adjusting mouse, pointer and cursor visibility in Microsoft Windows 10. The video seeks to educate those who are struggling with the new Windows 10 Graphical User Interface. Change Cu…
Sometimes it takes a new vantage point, apart from our everyday security practices, to truly see our Active Directory (AD) vulnerabilities. We get used to implementing the same techniques and checking the same areas for a breach. This pattern can re…

636 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