Oracle Administration - How to find which row in which datafile?

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Heterogeneous Primary and Physical Standbys in Same Data Guard Configuration

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I read My Oracle Support note “Data Guard Support for Heterogeneous Primary and Physical Standbys in Same Data Guard Configuration [ID 413484.1]” . I made decision that let me check this.Then I have create two virtual machines with Oracle Virtual Box. Witch is a virtual machine OS Oracle Linux server 6.2 (x86_64) and a Virtual Machine with OS Microsoft Windows 2008 Server R2 (x64) . Installed Oracle Database 11g Release 2 (11.2.0.3) both server, and a database (ADMDB) is created on first server. I used RMAN Duplicate command for creation of standby database and after creation of standby  database used D ata G uard M ana g e r Command- L ine interface for creation of data guard configuration. I think about that I achieved this, this will be for all oracle database administrators very interesting. [ID 413484.1] : The simplest path when deploying Data Guard is to configure a homogeneous and symmetric primary/standby configuration.  However, it is often useful to depl...
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Oracle Data Guard 11g - Redo Transport User

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Oracle Database 12c Release 2 - Long Identifiers

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Prior to Oracle Database 12c Release 2 have a problem with long identifier name, for example, in 11.2 version you cannot create long name (max 30 Bytes) tables.  As you see, from screenshots length of  table name  column is maximum 30. Creating table with long name Table Name Column size 30 In Oracle Database 12c Release 2 changed the length of identifier names, and this change depends on the COMPATIBLE initialization parameter. Documentation says: If COMPATIBLE is set to a value of 12.2 or higher, then names must be from 1 to 128 bytes long with these exceptions: Names of databases are limited to 8 bytes. Names of disk groups, pluggable databases (PDBs), rollback segments, tablespaces, and tablespace sets are limited to 30 bytes. If an identifier includes multiple parts separated by periods, then each attribute can be up to 128 bytes long. Each period separator, as well as any surrounding double quotation marks, counts as one byte. For example, suppose...
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