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January 2016

SQL*Plus quick tip

SQL Plus does not appear to be bothered by the direction of slashes, ie “/” or “\” in its scripts

Hence as long as you have a “C:\tmp” folder on your Windows drive (or wherever your SQL Pus binaary is installed/running from), you can do:


spool /tmp/blah
@/tmp/my_file.sql

and it will work on Unix and Windows without alteration.

(This also works for SQLcl as well by the way)

SAMPLE costing

People often think when using the SAMPLE clause, that because they are only dealing with a subset of the data, that immediately it should be a much faster operation. And whilst sometimes this is indeed the case, it is not a guarantee.

My BIWA Summit Presentations

Here are the two BIWA Summit 2016 presentations I delivered today. The first one is a collection of high level thoughts (and opinions) of mine and the 2nd one is more technical:

My BIWA Summit Presentations

Here are the two BIWA Summit 2016 presentations I delivered today. The first one is a collection of high level thoughts (and opinions) of mine and the 2nd one is more technical:
SQL in the Hybrid World from Tanel Poder SQL Monitoring in Oracle Database 12c from Tanel Poder  

My BIWA Summit Presentations

Here are the two BIWA Summit 2016 presentations I delivered today. The first one is a collection of high level thoughts (and opinions) of mine and the 2nd one is more technical:
SQL in the Hybrid World from Tanel Poder SQL Monitoring in Oracle Database 12c from Tanel Poder  

My BIWA Summit Presentations

Here are the two BIWA Summit 2016 presentations I delivered today. The first one is a collection of high level thoughts (and opinions) of mine and the 2nd one is more technical:
SQL in the Hybrid World from Tanel Poder SQL Monitoring in Oracle Database 12c from Tanel Poder  

My BIWA Summit Presentations

Here are the two BIWA Summit 2016 presentations I delivered today. The first one is a collection of high level thoughts (and opinions) of mine and the 2nd one is more technical:
SQL in the Hybrid World from Tanel Poder SQL Monitoring in Oracle Database 12c from Tanel Poder  

Why ask how, when why is so much more fun?

OK. So the original quote from Spawn is exactly the opposite, but let’s go with it… :)

A few times in the past I’ve been asked questions and started to give a direct answer, then someone smarter has jumped in and asked the killer question. Why? Quite often it’s easy to answer the initial question, so rather than understand the reason for the question, you just respond and pat yourself on the back. That’s great, but without knowing the context of the question, the “right answer” could actually be the “wrong answer”. As Tom always says, “The answer to every question is *it depends*!”

Trace file size

Here’s a convenient enhancement for tracing that came up on Twitter a few days ago – first in a tweet that I retweeted, then in a question from Christian Antognini based on this bit of the 12c Oracle documentation (opens in separate tab). The question was – does it work for you ?

The new description for max_dump_file_size says that for large enough values Oracle will split the file into multiple chunks of a few megabytes, using a suffix to identify the sequence of the chunks, keeping only the first chunk and the most recent chunks. Unfortunately this doesn’t seem to be true. However, prompted by Chris’ question I ran a quick query against the full parameter list looking for parameters with the word “trace” in their name:

Oracle Midlands : Event #13

Tomorrow is Oracle Midlands Event #13.

om13

Franck is a super-smart guy, so please show your support and start the year as you mean to go on!

Cheers

Tim…


Oracle Midlands : Event #13 was first posted on January 25, 2016 at 11:41 pm.
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