Comments on: ADF: The best way to indicate for records in a table the existence of details – or: the importance of up-to-date SQL knowledge http://technology.amis.nl/2011/10/27/adf-the-best-way-to-indicate-for-records-in-a-table-the-existence-of-details-or-the-importance-of-up-to-date-sql-knowledge/?utm_source=rss&utm_medium=rss&utm_campaign=adf-the-best-way-to-indicate-for-records-in-a-table-the-existence-of-details-or-the-importance-of-up-to-date-sql-knowledge Fri, 12 Apr 2013 10:04:09 +0000 hourly 1 http://wordpress.org/?v=3.5.1 By: Florin Marcus http://technology.amis.nl/2011/10/27/adf-the-best-way-to-indicate-for-records-in-a-table-the-existence-of-details-or-the-importance-of-up-to-date-sql-knowledge/#comment-6915 Florin Marcus Wed, 09 Nov 2011 07:02:45 +0000 http://technology.amis.nl/blog/?p=13912#comment-6915 As always, good article.
This solution is indeed the fastest. However, some purists may complain that it breaks encapsulation, since any access to EMP table ideally should be ‘hidden’ behind EmpEO and EmpVO .  Breaking this rule too often might decrease the maintenance level of the application.
Thank you,
Florin
 

]]> By: Lucas Jellema http://technology.amis.nl/2011/10/27/adf-the-best-way-to-indicate-for-records-in-a-table-the-existence-of-details-or-the-importance-of-up-to-date-sql-knowledge/#comment-6914 Lucas Jellema Sun, 30 Oct 2011 06:06:27 +0000 http://technology.amis.nl/blog/?p=13912#comment-6914 Anton, as always, I stand corrected – or at least tweaked. You are right of course. Thanks for this feedback.

Lucas

]]> By: Anton Scheffer http://technology.amis.nl/2011/10/27/adf-the-best-way-to-indicate-for-records-in-a-table-the-existence-of-details-or-the-importance-of-up-to-date-sql-knowledge/#comment-6913 Anton Scheffer Fri, 28 Oct 2011 07:24:04 +0000 http://technology.amis.nl/blog/?p=13912#comment-6913 If you are worried about millions of details the following will be faster:
, case when exists ( select null from emp e where e.deptno = Department.deptno ) then ‘Y’ else ‘N’ end

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