Posts

Default Tablespace Encryption In The Clouds?

One of my customers called me up last week and said he’s been having the most peculiar problem. He created a new instance on the Microsoft Azure environment (12.1.0.2 SE) and he can’t create new tablespaces. The error he was getting was “ORA-28365: wallet is not open”, and he is wondering “what gives?!”.

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elephant don't forget

Oracle 12c Caching and In Memory Databases

A few weeks ago, I was asked to give a private session about In-Memory database vs. traditional persistent databases. I created an hour-long session explaining the basics of database systems, how in-memory systems work, and when to use each of the systems.

One of the questions I got (and answered) was about persistent (regular) database cache mechanism – and I felt this is a good opportunity to write about Oracle 12c new feature – the Force FULL database cache.

In my session, I gave a long explanation about several hybrid solutions (such as the MySQL memory storage engine, and Oracle 12c database In-Memory option) but this post will focus on the Force Full database cache, which will be explained in the second part of the post.

Enjoy!

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SQL Riddle: Find the Sum of ASCII Codes of Employee Names (solution)

Zahar Hilkevich (from the blog – https://sqlpatterns.wordpress.com – cool blog, you should check it out) posted a riddle on Facebook.
The question was:

“For every employee find the sum of ASCII codes of all the characters in their names. Write a single SELECT statement only.”

EMPNO ENAME       SUM_ASCII
----- ---------- ----------
 7788 SCOTT             397
 7876 ADAMS             358
 7566 JONES             383
 7499 ALLEN             364
 7521 WARD              302
 7934 MILLER            453
 7902 FORD              299
 7369 SMITH             389
 7844 TURNER            480
 7698 BLAKE             351
 7782 CLARK             365
 7654 MARTIN            459
 7839 KING              297
 7900 JAMES             368

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Installing Oracle 12.1.0.2 – Part 2: Creating an Instance

In the earlier post we installed the Oracle version 12.1.0.2 (software only) but still didn’t create a database instance. In this post we will go over an installation procedure of a basic CDB database instance. This will be the first instance on that database server (and I’ll explain later why this is important).

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Installing Oracle 12.1.0.2 – Part 1

It’s been a few months since 12.1.0.2 came out. Here is a basic guide for installing Oracle 12c (12.1.0.2).
This is a two-part post – in the first part we will install the software and in the next part we’ll go over creating the new database instance.

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Database In Memory presentation from the ilOUG SIG meeting

A few weeks ago, I was invited to give a lecture at the Israeli user group meeting (ilOUG DBA SIG). The presentation topic was the new Oracle 12c feature – the Database In Memory (aka In Memory Option).
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