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Wadhah DAOUEHI
Wadhah DAOUEHI
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Category Archives: SQL

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Oracle 19c – SQL Access Path: Index Skip Scan

By Wadhah DAOUEHI | November 1, 2025 - 6:44 pm |March 9, 2026 Oracle 19c, Oracle Database, SQL
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In Oracle Database 19c, the Cost-Based Optimizer (CBO) selects the best method to retrieve rows … Read More →

Oracle 19c – SQL Access Path: Index Full Scan

By Wadhah DAOUEHI | October 23, 2025 - 5:30 pm |March 8, 2026 Oracle 19c, Oracle Database, SQL
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In Oracle Database 19c, the Cost-Based Optimizer (CBO) selects the most efficient method to retrieve … Read More →

Oracle 19c – SQL Access Path: Index Range Scan

By Wadhah DAOUEHI | October 15, 2025 - 5:08 pm |March 8, 2026 Oracle 19c, Oracle Database, SQL
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In Oracle Database 19c, the Cost-Based Optimizer (CBO) determines the most efficient way to retrieve … Read More →

Oracle 19c – SQL Access Path: Index Unique Scan

By Wadhah DAOUEHI | October 8, 2025 - 4:48 pm |March 8, 2026 Oracle 19c, SQL
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In Oracle Database 19c, the Cost-Based Optimizer (CBO) selects the most efficient method to retrieve … Read More →

Oracle 19c – SQL Access Path: ROWID Scan

By Wadhah DAOUEHI | October 1, 2025 - 3:32 pm |March 8, 2026 Oracle 19c, Oracle Database, SQL
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In Oracle Database 19c, the Oracle Optimizer determines the best method to retrieve data from … Read More →

Oracle 19c – SQL Access Path: Full Table Scan

By Wadhah DAOUEHI | September 27, 2025 - 3:13 pm |March 8, 2026 Oracle Database, SQL
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In Oracle Database 19c, when executing a SQL query, the Oracle Optimizer determines the most … Read More →

Monitoring the Oracle Fast Recovery Area (FRA)

By Wadhah DAOUEHI | July 24, 2025 - 1:17 pm |February 24, 2026 Oracle Database, SQL
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1. Objective The objective of monitoring the Fast Recovery Area (FRA) in Oracle is to: … Read More →

save SQLPLUS commands history on Linux within the package rlwrap (readline wapper).

By Wadhah DAOUEHI | August 3, 2016 - 4:42 pm |June 1, 2018 Linux, Oracle, SQL
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This article explains how to save SQLPLUS commands history on Linux within the package rlwrap … Read More →

Dealing with INVALID status of Oracle database components after upgrade to 12c (12.1.0.2)

By Wadhah DAOUEHI | August 31, 2015 - 11:38 pm |June 1, 2018 Linux, Oracle, Oracle Database, SQL
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Dealing with INVALID status of Oracle database components after upgrade to 12c (12.1.0.2)

This article deals with INVALID, OPTION OFF status of Oracle database components AMD, ORDIM, JAVAVM, … Read More →

Active Oracle database duplication

By Wadhah DAOUEHI | November 20, 2014 - 10:49 pm |June 1, 2018 Linux, Oracle, Oracle Database, SQL
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This article explains how to set up an Active Oracle database duplication with the RMAN … Read More →

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  • Recent Posts

    • Oracle 19c: Index-Organized Table (IOT)
    • Oracle 19c – SQL Access Path: Index Skip Scan
    • Oracle 19c – SQL Access Path: Index Full Scan
    • Oracle 19c – SQL Access Path: Index Range Scan
    • Oracle 19c – SQL Access Path: Index Unique Scan
    • Oracle 19c – SQL Access Path: ROWID Scan
    • Oracle 19c – SQL Access Path: Full Table Scan
    • OS_AUTHENT_PREFIX External Authentication in Oracle Database 19c
    • Oracle 19c Flashback Technology (7/7): Data Archives
    • Oracle 19c Flashback Technology (6/7): Flashback Database/PDB
    • Oracle 19c Flashback Technology (5/7): TRANSACTION
    • Oracle 19c Flashback Technology (4/7): Table
    • Oracle 19c Flashback Technology (3/7): Drop Table
    • Oracle 19c Flashback Technology (2/7): Versions Query
    • Oracle 19c Flashback Technology (1/7): Query
    • Recommended UNDO Tablespace Size in Oracle 19c Using the Undo Advisor (SQL Only)
    • Understanding UNDO Configuration and RETENTION GUARANTEE in Oracle 19c
    • Materialized View Log in Oracle 19c (ON COMMIT)
    • Materialized View Log in Oracle 19c (ON DEMAND)
    • Reinitializing the Same Password After Expiration in Oracle 19c
    • Switching Session User in Oracle Database
    • Monitoring the Oracle Fast Recovery Area (FRA)
    • Database 19c Vault: OWNER/Manager privileges !
    • Enabling the Database Vault (Initialisation parameters)
    • [FATAL] [DBT-09352] Error in validating dbv_owner credentials.
    • Oracle 19c: Convert Table to range partition online
    • Oracle 19c: Automatic List-Partitioned Table (2/2)
    • Oracle 19c: Automatic List-Partitioned Table (1/2)
    • Oracle 19c: Interval Partitioning (2/2)
    • Oracle 19c: Interval Partitioning (1/2)
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