Create Multitenant databases with DBCA – Things to Know

Create Multitenant databases with DBCA - Things to KnowWhen you create Multitenant databases with DBCA there are some Things to Know. And in Oracle Database’s Database Creation Assistant (DBCA) there is a common pitfall in the “Options” screen. It was grayed out in the previous release but when you choose to create a “custom” database you can select the options/components now.… [Read More]

Use your own templates in DBCA to create databases

Use your own templates in DBCA to create databasesAnother advice regarding database creation:
Use your own templates in DBCA to create databases.

This way you can configure not only the options and components to create but also redo log layout, your set of parameters and much more. And it is less error prone than a “create database” script.

Use your own template in DBCA

Creating your own template in DBCA (Database Configuration Assistant) is quite easy and straight forward.… [Read More]

Always create databases as CUSTOM databases

I’m giving this advice to customers for many years:
When you create a fresh Oracle database ALWAYS create databases as CUSTOM databases. Via template or not doesn’t matter.

Always create CUSTOMER databasesIn the DBCA better use your own and wisely configured template rather than the prebuilt (we used to call them: seed) databases.… [Read More]

Does DBCA execute “datapatch” in Oracle 12.2?

Does the Database Configuration Assistant (DBCA) execute “datapatch -verbose” in Oracle 12.2 when you create a new database?

Does DBCA in Oracle 12.2 execute datapatch when you create new database? I was curious if this misbehavior from the previous release has been fixed. Good news: It got fixed with Oracle Database… [Read More]

Create a database with NON-DEFAULT Time Zone

One requirement of Transportable Tablespaces (and of course Full Transportable Export/Import as well) is to have identical database character sets AND identical time zone settings.


Source database has a lower time zone setting than the default target database in the destination home.

Lets assume you’d like to migrate an Oracle off IBM AIX and migrate it into Oracle on an Exadata meaning Oracle Linux 6.… [Read More]

DBCA 12c and “” – things to know

A few weeks ago I did blog about the DBUA (Database Upgrade Assistant) not executing ‘datapatch’ (i.e. not applying the SQL changes involved with a SPU/PSU/BP) automatically:

DBUA 12c and “” – things to know

For DBUA, please note that this behavior DOES NOT APPLY to command line upgrades done with – as you can see from this somewhat disturbing messages during the upgrade in phase 65 and phase 69 (which are not errors but just informational messages for datapatch’s execution):

Datapatch phases command line upgrade

But afterwards I have learned that things are worse.

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