Solved

MS SQL query

Posted on 2004-04-01
8
307 Views
Last Modified: 2010-05-18
Hi all,
I want to perform an intersection or minus operation in Ms SQL.
I was trying the following:

(select language.language from language)
intersect
(select language.language
from language,user,user_language
where
language.id = user_language.user_id
and
user.id = user_language.lang_id)

The table structures are:
user:
         id          varchar      primary key
         name     varchar
language:
         id           varchar     primary key
         language varchar
user_language:
        user_id    varchar
        lang_id    varchar


It's working fine if I give replace intersect with union. But for intersect it's giving the following error:

Server: Msg 156, Level 15, State 1, Line 2
Incorrect syntax near the keyword 'intersect'.

But I need to do the intersect operation. Does MS SQL not support intersect or my query is wrong.
Pls help
Thanks in advance
0
Comment
Question by:kajalg
[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
  • 4
  • 2
8 Comments
 
LVL 26

Expert Comment

by:Hilaire
ID: 10731235
intersect doesn't exist in SQL Server

You should get what you want with

select distinct language.language
from language l inner user_language ul on l.id = ul.language_id
inner join user u on u.id = ul.user_id
0
 
LVL 26

Expert Comment

by:Hilaire
ID: 10731243
you don't need the INTERSECT in the above query, because the inner joins checks for existence of the language in the language table

HTH

Hilaire
0
 
LVL 26

Expert Comment

by:Hilaire
ID: 10731246
select distinct l.language
from language l inner user_language ul on l.id = ul.language_id
inner join user u on u.id = ul.user_id
0
Optimize your web performance

What's in the eBook?
- Full list of reasons for poor performance
- Ultimate measures to speed things up
- Primary web monitoring types
- KPIs you should be monitoring in order to increase your ROI

 

Author Comment

by:kajalg
ID: 10738508
There was an error in the query I gave. The where clause should be
"........
language.id = user_language.lang_id
and
user.id = user_language.user_id....
"
I think you pointed out the mistake.
However I run your query.

select distinct l.language
from language l inner user_language ul on l.id = ul.language_id
inner join user u on u.id = ul.user_id

It's giving the following error

Server: Msg 155, Level 15, State 1, Line 2
'user_language' is not a recognized join option.

 
0
 

Author Comment

by:kajalg
ID: 10738761
Actually what rowset I need is the language name some user doesn't have.
0
 
LVL 26

Accepted Solution

by:
Hilaire earned 50 total points
ID: 10739399
-- get languages that nobody has
select l.language
from language l
where not exists (
select 1
from user_language ul
inner join user u on u.id = ul.user_id
where ul.language_id = l.id
)

-- get languages that user 'John Doe' doesn't have
select l.language
from language l
where not exists (
select 1
from user_language ul
inner join user u on u.id = ul.user_id
where ul.language_id = l.id
and u.name = 'John Doe'
)


Sorry for the delay
Hilaire

0

Featured Post

Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

Question has a verified solution.

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

Load balancing is the method of dividing the total amount of work performed by one computer between two or more computers. Its aim is to get more work done in the same amount of time, ensuring that all the users get served faster.
A Stored Procedure in Microsoft SQL Server is a powerful feature that it can be used to execute the Data Manipulation Language (DML) or Data Definition Language (DDL). Depending on business requirements, a single Stored Procedure can return differe…
Via a live example, show how to extract information from SQL Server on Database, Connection and Server properties
Viewers will learn how to use the UPDATE and DELETE statements to change or remove existing data from their tables. Make a table: Update a specific column given a specific row using the UPDATE statement: Remove a set of values using the DELETE s…

626 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