SQL & PL/SQL
Submitted by jp_vijaykumar on Sat, 2019-01-05 18:03
--NAIVE BAYES ALGORITHM WITH SQL & PL/SQL
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--Written JP Vijaykumar
--Date Jan 4th 2019
--This script is provided for educational purpose only.
--The readers are advised to make necessary changes as may be required for their use.
--I love data mining algorithms for their complexity and number crunching toughest logic.
--Academically, I want to generate Naive Bayes algorythm in pl/sql to predict the outcome.
Submitted by shabbier.sa on Wed, 2018-01-17 22:36
How to send Email in Oracle using Gmail.
Email sending by using Oracle through Gmail:
BEGIN EMAIL_GMAIL.SEND ('shabbier.sa@gmail.com','shabbier.sa@gmail.com','Your email subject','Emaisaaasdasal Message body'); END;
Submitted by John Watson on Fri, 2017-03-31 05:01
I am fascinated by what I call "equal SQL": statements that are equivalent, in that they deliver the same result but may have hugely different performance characteristics. Here's a little case study.
Submitted by ymusani on Fri, 2017-01-20 03:00
Row Limiting Clause for Top-N Queries in Oracle Database 12c Release 1 (12.1)
Related articles.
Submitted by John Watson on Fri, 2016-10-14 07:54
Developers who come to Oracle with a background in procedural languages sometimes do not understand how efficient SQL's set oriented processing can be. This little demonstration should convince them: never use PL/SQL when SQL will do.
Submitted by John Watson on Sun, 2016-10-02 02:57
We all know that using SELECT * is bad programming. One reason is that you cannot control the order in which columns are returned. Well, you can in release 12c.
Submitted by John Watson on Fri, 2016-08-12 03:44
Many developers find that their code fails with ORA-942, but when they test the failing statement from the SQL> prompt, it works. Why, and what can you do to fix it?
Submitted by Natalka Roshak on Mon, 2016-06-13 14:25
The CONNECT BY syntax provides a useful pseudocolumn, CONNECT_BY_ISLEAF, which identifies leaf nodes in the data: it’s 1 when a row has no further children, 0 otherwise. In this post, I’ll look at emulating this pseudocolumn using recursive WITH.
Submitted by Natalka Roshak on Fri, 2016-06-03 04:38
In my last post, I looked at using recursive WITH to implement simple recursive algorithms in SQL. One very common use of recursion is to traverse hierarchical data. I recently wrote a series of posts on hierarchical data, using Oracle’s CONNECT BY syntax and a fun example. In this post, I’ll be revisiting the same data using recursive WITH.
Submitted by Natalka Roshak on Tue, 2016-05-24 04:03
I recently had the opportunity to talk with Tom Kyte (!), and in the course of our conversation, he really made me face up to the fact that the SQL syntax I use every day is frozen in time: I’m not making much use of the analytic functions and other syntax that Oracle has introduced since 8i.
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