Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action. Forget about retraining and skyrocket knowledge retention rates.
Course Of The Month
7 days, 4 hours left to enrollBecome a Premium Member and unlock a new, free course in leading technologies each month.
Solved
SQL UNION Operator
Posted on 2013-01-24
Hi Expert,
Code is here
SET @SQL_MAIN = @SQL_MAIN + @SQL_1
EXECUTE SP_EXECUTESQL @SQL_MAIN
----------SQL_MAIN is main query, @SQL_1 inner join table A, @SQL_2 inner join table B
I want Union @SQL_2, how to do it?
thanks in advance
Code is here
SET @SQL_MAIN = @SQL_MAIN + @SQL_1
EXECUTE SP_EXECUTESQL @SQL_MAIN
----------SQL_MAIN is main query, @SQL_1 inner join table A, @SQL_2 inner join table B
I want Union @SQL_2, how to do it?
thanks in advance
[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-
2
5 Comments
I suggest you rather use CTE instead of @sql2 - just put all that query or even both in CTE and use them in a UNION afterwards.
http://msdn.microsoft.com/en-us/library/ms190766(v=sql.105).aspx
here's one with UNION ALL but you can just drop the ALL
http://stackoverflow.com/questions/8985609/union-all-in-cte
more complicated recursive CTE examples here:
http://stackoverflow.com/questions/3159192/sql-server-2008-cte-recursion
http://msdn.microsoft.com/en-us/library/ms190766(v=sql.105).aspx
here's one with UNION ALL but you can just drop the ALL
http://stackoverflow.com/questions/8985609/union-all-in-cte
more complicated recursive CTE examples here:
http://stackoverflow.com/questions/3159192/sql-server-2008-cte-recursion
as it's not clear (to me) what you want to achieve, can you please show examples of the values of @main, @sql1, @sql2 and the requested end result
@main=select * from table A inner join table B
@sql1= @main + " inner join table C"
@sql2= @main + " inner join table D"
Something like that.
I got Union All and result correct, i don't know why use CTE? any better?
Thanks.
@sql1= @main + " inner join table C"
@sql2= @main + " inner join table D"
Something like that.
I got Union All and result correct, i don't know why use CTE? any better?
Thanks.
that looks fine, actually, in the basics, so it should work
the question is: why you want/need dynamic sql.
with CTE, you would avoid dynamic sql which may give you issues at other levels.
the question is: why you want/need dynamic sql.
with CTE, you would avoid dynamic sql which may give you issues at other levels.
;WITH main AS ( Select * from tableA inner join table B ON ... )
SELECT * from main join table_c on ...
UNION ALL
SELECT * from main join table_d on ...
Featured Post
Question has a verified solution.
If you are experiencing a similar issue, please ask a related question
When we have to pass multiple rows of data to SQL Server, the developers either have to send one row at a time or come up with other workarounds to meet requirements like using XML to pass data, which is complex and tedious to use. There is a …
In this article I will describe the Copy Database Wizard method as one possible migration process and I will add the extra tasks needed for an upgrade when and where is applied so it will cover all.
Monitoring a network: why having a policy is the best policy? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the enormous benefits of having a policy-based approach when monitoring medium and large networks. Software utilized in this v…
Add bar graphs to Access queries using Unicode block characters. Graphs appear on every record in the color you want. Give life to numbers.
Hopes this gives you ideas on visualizing your data in new ways ~
Create a calculated field in a query:
…
Suggested Courses
Course of the Month7 days, 4 hours left to enroll
Earn Certification
Administering Microsoft SQL Server 2012 Databases (Exam 70-462)
$79.00$71.10
726 members asked questions and received personalized solutions in the past 7 days.
Join the community of 500,000 technology professionals and ask your questions.