Free Gateway to Oracle Database (Free SQL)
For developers, students, and database enthusiasts, getting hands-on practice with a powerful database system like Oracle has often required...
March 5, 2026
Ahmet Duruöz
2026
PDB Lockdown Profiles
PDB Lockdown Profiles are a security feature in Oracle’s multitenant architecture that allows administrators to restrict specific operations and features...
March 5, 2026
Oracle Flex Clusters
Oracle Flex Clusters From Oracle Grid Infrastructure 12c Release 2 (12.2) onward, all cluster configurations are implemented as Oracle Flex...
March 3, 2026
Transparent Application Continuity (TAC)
What is Transparent Application Continuity (TAC)? With the release of Oracle Database 18c, Transparent Application Continuity introduces an automated method...
February 27, 2026
Recovery steps for OCR (Oracle Cluster Registry), voting disks, or ASM passwords in an Oracle RAC 19c
Losing OCR (Oracle Cluster Registry), voting disks, or ASM passwords in an Oracle RAC 19c environment is critical but recoverable....
February 7, 2026
2025
Oracle Globally Distributed Database
Oracle Globally Distributed Database Introduction Oracle’s 26ai release introduces a groundbreaking innovation: the Globally Distributed Database, a fully managed, horizontally scalable...
December 30, 2025
How to find chained rows in a table ?
A chained row is a row that does not fit into a single database block. For example, if you try...
December 23, 2025
DIA-49803: Purge not possible due to incompatible schema version
This error indicates that there’s a schema version mismatch between the ADRCI (Automatic Diagnostic Repository Command Interpreter) utility and the...
November 27, 2025
Oracle Database 23ai key innovations with examples
Oracle Database 23ai is the latest long-term support release, and its name explicitly highlights its core focus: Artificial Intelligence. The “ai”...
October 31, 2025
How to move the Oracle ASM instance password file from the file system to the disk group ?
When the password file is stored inside a disk group, it is automatically replicated across all disks in the group,...
October 16, 2025
How to recreate Grid Plug and Play ( GPnP ) profile ?
The GPnP profile is a XML file located in GRID_HOME/gpnp/<hostname>/profiles/peer under the name profile.xml. It is stored in the local...
October 14, 2025
Generating DDL script for a schema by using impdp
SQLFILE parameter in impdp can be used to generate the DDLs from a dumpfile. If you need the DDL of...
October 9, 2025
How to reset Mysql root password ?
The MySQL root password provides the root user with full access to the MySQL database. If the root password is...
June 24, 2025
Oracle Database Feature Usage Statistics
Oracle Database includes a powerful internal mechanism called Feature Usage Statistics (FUS), which helps DBAs and system administrators track which...
April 14, 2025
SQL Tuning Health-Check Script (SQLHC)
SQL Tuning Health-Check Script (SQLHC) is used to check the environment in which a single SQL statement is running, Cost-based...
March 19, 2025
