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 (220.127.116.11 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?!”.
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.
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
In the earlier post we installed the Oracle version 18.104.22.168 (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).
It’s been a few months since 22.214.171.124 came out. Here is a basic guide for installing Oracle 12c (126.96.36.199).
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.
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).