Good old BIN_TO_NUM to check the overall status

A good while ago Chris Saxon, member of the AskTom answer team, asked on twitter which datatype you use when defining tables when you need a Boolean-representation. As you might know there is no Boolean datatype in SQL.
A lot of discussion followed which I'm not going to repeat.
Usually I use a VARCHAR2(1) with a check constraint for Y and N, but for a recent requirement I decided to use a NUMBER instead.

(more...)

Reset Oracle Password

This blog entry shows you how to reset the system password for an Oracle Database. It uses a Linux image running Oracle Database 11g Express Edition. It assumes the student user is the sudoer user.

After you sign on to the student user account, you open a Terminal session and you should see the following:

[student@localhost python]$ 

The oracle user account should be configured to prevent a login. So, you should use the su (more...)

ORA-00322: log 41 of thread 2 is not current copy

On a Data Guard Physical Standby, I noticed the following in the alert log:

Fri Jan 13 08:12:39 2017 
Errors in file /u01/app/oracle/diag/rdbms/v1s/V1S1/trace/V1S1_arc1_399861.trc: 
ORA-00322: log 41 of thread 2 is not current copy 
ORA-00312: online log 41 thread 2: '+RECOC1/V1S/ONLINELOG/group_41.3099.912775569' 
ORA-00322: log 41 of thread 2 is not current copy 
ORA-00312: online log 41 thread 2: '+DATAC1/V1S/ONLINELOG/group_41.807.912775567'

If you read metalink note:

Physical standby – alert*log shows ORA-322, ORA-312 intermittently (more...)

ORA-00314: log 42 of thread 2, expected sequence# 37363 doesn’t match 37361

On a Data Guard Physical Standby, I noticed the following in the alert log:

Mon Jan 30 12:37:22 2017
Errors in file /u01/app/oracle/diag/rdbms/v1s/V1S1/trace/V1S1_arc1_105040.trc:
ORA-00314: log 42 of thread 2, expected sequence# 37363 doesn't match 37361
ORA-00312: online log 42 thread 2: '+RECOC1/V1S/ONLINELOG/group_42.15446.927996415'
ORA-00314: log 42 of thread 2, expected sequence# 37363 doesn't match 37361
ORA-00312: online log 42 thread 2: '+DATAC1/V1S/ONLINELOG/group_42.1051.927996411'

If you read metalink note:

ORA-00314: LOG 404 OF (more...)

Oracle Database Backup Service Fails with: ORA-19511: – KBHS-00715: HTTP error occurred ‘oracle-error’

I discovered a Oracle Cloud Database Backup failing with:

Starting backup at 2017/01/20 20:00:04
current log archived
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of backup plus archivelog command at 01/20/2017 20:00:08
ORA-19554: error allocating device, device type: SBT_TAPE, device name:
ORA-27023: skgfqsbi: media manager protocol error
ORA-19511: non RMAN, but media manager or vendor specific failure, error text:
 KBHS-00715: HTTP error occurred 'oracle-error'
KBHS-00712: ORA-28750 received from local  (more...)

Oracle Diagnostic Queries

It’s always a challenge when you want to build your own Oracle SQL Tools. I was asked how you could synchronize multiple cursors into a single source. The answer is quite simple, you write an Oracle object type to represent a record structure, an Oracle list of the record structure, and a stored function to return the list of the record structure.

For this example, you create the following table_struct object type and a table_list (more...)

Oracle Database 12.1.0.2.0 are officially supported on Docker

Since yesterday, Tuesday 20th December 2016, the Oracle Database 12.1.0.2.0 and later are officially supported on Docker :-)

The corresponding My Oracle Support Note 2216342.1 can be found here: https://support.oracle.com/epmos/faces/DocContentDisplay?id=2216342.1


In the GitHub Repository of Oracle the related README is also updated to reflect the support for Oracle Database 12.1.0.2.0 and later on Docker.
All required files to build such a supported Oracle Database Instance on Docker can be found here: https://github.com/oracle/docker-images/tree/master/OracleDatabase


Book on Oracle 12c New features

A Book on Oracle 12c New features for administrators

Hi All,

It’s our pleasure to announce the availability of our first book – OCP 12c upgrade 1Z0-060 Exam Guide

 

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The book covers the new features of the Oracle Database 12c for the DBAs from the OCP 12c upgrade exam standpoint. Book is available WW in kindle format as well as paperback.

Link to Amazon.com (more...)

Dallas Oracle User Group Performance & 12.2 New Features Technical Day

Just letting people in DFW area know that I’m speaking at the DOUG Performance & Tuning and 12.2 New Features Technical Day!

Time:

  • Thursday 20 October 2016 9:30am-5:30pm

Location: 

  • Courtyard & TownePlace Suites DFW Airport North/Grapevine, TX
    2200 Bass Pro Court|Grapevine, TX 76051

Speakers (Seven Oracle ACE Directors!):

  • Jim Czuprynski

  • Charles Kim

  • Cary Millsap

  • Dan Morgan

  • Kerry Osborne

  • Tanel Poder

  • Nitin Vengurlekar

Topics:

  • I’ll speak about In-Memory Processing for Databases where I plan (more...)

Using Oracle 12c with Pivotal Cloud Foundry Applications

In this post I walk through what it would take to access Oracle 12c using a spring boot application deployed to Pivotal Cloud Foundry PCF all from my Macbook Pro. Of course this can be done outside of an isolated laptop like my Macbook Pro but handy while doing DEV/TEST and still being able to use Oracle 12c.

Requirements
  • Oracle 12c instance
  • PCFDev 
  • Git Client

1. First you will need a 12c Database and the (more...)

RegExp: Constraint to prevent spaces at the beginning or end.

Even though a space is a regular character, the client didn't want spaces at the beginning or end of a string. Any spaces in the middle were fine.
Of course this could be handled by the application, but it must also be implemented in the database. Using a check constraint with a regular expression will prevent the end user from entering unwanted data.

To try things out, let's just start with a simple table with (more...)

Oracle 12c Learning Series: Automatic Table Recovery Using RMAN

Table recovery was possible in earlier release as well. Until previous release, if we wanted to recover a table, we had following options

  • Database point in time recovery (DBPITR)
  • Tablespace point in time recovery (TSPITR)
  • Flashback technology

In Oracle 12c, RMAN has been enhanced to perform recovery of table. We have a new command in RMAN which automates complete process of recovering the table. New process does not affect the existing objects in the database (more...)

Oracle 12c Learning Series: In-database Archiving and Temporal Validity

One of the major challenge faced by an Oracle DBA is – how to effectively deal with historical data? Today, if we consider database tables for an enterprise, data in the table goes back several years and most of the data in the table is inactive. Challenge remains as to how to archive this data and make our query run efficiently.

If we choose to archive old data outside of database on a tape, cost (more...)

Oracle 12c Learning Series: Automatic Data Optimization – ADO

I am starting Oracle 12c learning series, where I am planning to publish multiple articles on Oracle 12c new features. I hope these articles will be helpful to DBAs aspiring for OCP 12c certification and also others who are planning to implement these features in there databases.

This is a very long post about ADO – Automatic Data Optimization, which is one of the ILM strategy to manage aging data. So please be patient while reading this article. This article provides end-to-end details (more...)

Top N- queries: using the 12c syntax.

One of the new features with Oracle database 12c is the new syntax for Top N queries and pagination. Did we really need this? Should you choose for the new syntax over the way we used to do it, with an inline view? I think so, it simply adds syntactic clarity to the query, and in this blogpost I will show the difference between the "old" and the "new".

For the examples I will use (more...)

Rounding amounts, divide cents over multiple lines

In previous articles I wrote about dealing with a missing cent when you need to divide a certain amount over multiple lines. In these articles, links are at the bottom, I described a method to calculate the difference on the last row.
Then a question arose (as a comment):
What if for example i have 42 records and i wish to divide 100 by 42. I would get a rounded value of 2.38. If (more...)

#DB12c feature – Secure External Procedures with DBMS_CREDENTIAL

Oracle Database 12c enables enhanced security for extproc by authenticating it against a user-supplied credential. This new feature allows the creation of a user credential and links it with a PL/SQL library object. Whenever an application calls an external procedure, the extproc process authenticates the connection before loading the shared library. The DBMS_CREDENTIAL package is … Continue reading

Temporal validity, multiple end dates

Recently I got involved in a question on Temporal Validity Periods together with Chris Saxon, one of the askTom-answer team.

The question was along the lines of: "What if I have a single start date but two possible end dates. One of the end dates is filled automatically by a background proces (could be a job) while the other one is to signal that the end date is set manually by the user. Could you (more...)

APEX 5.0 Beyond basics

iAdvise presented the APEX 5.0 roadshows in the first half of 2015. Besides the presentation about the new features, we provided 3 tutorials which helped the visitors to explore Oracle Application Express 5.0. Now we offer these tutorials through our blog. In this article the second tutorial is presented.

This tutorial helps you step by step through the process of migrating an application to the Universal Theme of Oracle Application Express 5.0. In this tutorial we talk about (more...)

Migrate an application to the APEX 5.0 Universal Theme

iAdvise presented the APEX 5.0 roadshows in the first half of 2015. Besides the presentation about the new features, we provided 3 tutorials which helped the visitors to explore Oracle Application Express 5.0. Now we offer these tutorials through our blog. In this article the second tutorial is presented.

This tutorial helps you step by step through the process of migrating an application to the Universal Theme of Oracle Application Express 5.0. In this tutorial we talk about (more...)