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David Aldridge's user avatar
David Aldridge's user avatar
David Aldridge's user avatar
David Aldridge
CTO
  • Member for 17 years, 7 months
  • Last seen this week
  • Haddenham, United Kingdom
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Top posts

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467
Fetch the rows which have the Max value for a column for each distinct value of another column
Sep 23, 2008
405
What's the difference between TRUNCATE and DELETE in SQL
Sep 26, 2008
324
What's the difference between TRUNCATE and DELETE in SQL
Sep 26, 2008
95
What is the difference between a hash join and a merge join (Oracle RDBMS )?
Jul 11, 2009
85
How do you interpret a query's explain plan?
Oct 1, 2008
83
Proper way of checking if row exists in table in PL/SQL block
Jan 15, 2014
59
How to choose and optimize oracle indexes?
Oct 17, 2008
53
When and why are database joins expensive?
Oct 6, 2008
51
How can I query Rails ActiveRecord data stored in arrays
Sep 4, 2015
50
take vs first performance in Ruby on Rails
Aug 28, 2013

Top network posts

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63
If it took 10 minutes to saw a board into 2 pieces, how long will it take to saw another into 3 pieces?
29
Victorian Ship Weighing
19
Partitioning vs Indexes
18
Why are constraints applied in the database rather than the code?
12
Is Oracle free to download?