How to delete duplicate records in oracle sql keeping one record?

https://www.oracletutorial.com/advanced-oracle-sql/how-to-delete-duplicate-records-in-oracle/ https://www.wikihow.com/Delete-Duplicate-Records-in-Oracle

As an Oracle Database Administrator (DBA) one should know for a Successful Career:

Oracle Database Administrator is one of the most prominent and attractive careers for any individual who is really interested in growing his/her career in the administrator role. For a successful career, we should have a details knowledge of the following topics: How to take Backup and restoration Sound Knowledge of Basic optimizations The ethics of […]

Could not start the OracleMTSRecoveryService service on Local Computer. Error 1: Incorrect function

Go to REGEDIT from run HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ORACLE\OracleMTSRecoveryService\Protid_0

Oracle Database Startup and Shutdown

Startup Procedure Nomount State: This is the state when the control file, online redo log files, and the database files are closed and are not accessible. The Oracle instance is available. Some of the v$ views (dynamic performance views) are available during this state. A database may be brought to this state to perform operations. […]

The connection pool named: |apex|| is not correctly configured, due to the following error(s): ORA-28001: the password has expired

The connection pool named: |apex|| is not correctly configured, due to the following error(s): ORA-28001: the password has expired SQL> connect / as SYSDBA Connected. SQL> SELECT username, account_status FROM dba_users WHERE ACCOUNT_STATUS LIKE ‘%EXPIRED%’; SQL> ALTER USER ORDS_PUBLIC_USER IDENTIFIED BY *******; User altered. ** Same as ALTER other all Expired & Locked USER

ORA-00333: redo log read error block XXXX count XXXX

For the original Article Please visit: DBALAND I encountered this Oracle error when connecting to my database after my laptop lost power and subsequently had some severe Blue Screen issues. According to Oracle, ORA-00333 is caused by an IO error while reading the log described in the accompanying error. The resolution is to restore accessibility […]

ORA-01589: must use RESETLOGS or NORESETLOGS option for database open

Problem Description: SQL> startup ORACLE instance started. Total System Global Area 1644167168 bytes Fixed Size 2925024 bytes Variable Size 1056968224 bytes Database Buffers 570425344 bytes Redo Buffers 13848576 bytes Database mounted. ORA-01589: must use RESETLOGS or NORESETLOGS option for database open Solution: Step-1: Execute the following command SQL> shutdown abort; SQL> […]

CRUD operation in PL/SQL:

In this tutorial, we are getting to find out how to use SQL in PL/SQL. SQL is that the actual component that takes care of fetching and updating of knowledge within the database whereas PL/SQL is that the component that processes these data. Further, during this article, we’ll also discuss the way to combine the SQL within the PL/SQL block. DML Transactions in PL/SQL DML stands […]

CRUD operation in SQL:

(INSERT): Create table dept: CREATE TABLE departments ( deptno NUMBER(2) CONSTRAINT departments_pk PRIMARY KEY, dname VARCHAR2(14), loc VARCHAR2(13)); Insert a single row into a table: INSERT INTO dept VALUES (10, ‘Branding’, ‘Dhaka’); Insert rows from one table into another table: INSERT INTO emp2 SELECT * FROM emp; CREATE TABLE emp3 AS SELECT * FROM emp; […]

Brief History of Oracle Database

Brief History of Oracle Database: The current version of Oracle Database is a results of over 30 years of innovative development. The main highlights within the evolution of Oracle Database include the following: Founding of Oracle: In 1977, Larry Ellison, Bob Miner, and Ed Oates started the consultancy Software Development Laboratories, which change name to […]

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