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How to schedule a job using DBMS_SCHEDULER in Oracle?
Use DBMS_SCHEDULER.create_job to create a scheduled task, and define the task name, type, and operation content through parameters such as job_name, job_type, and job_action. For example, set repeat_interval to execute PL/SQL blocks or call stored procedures at 2 a.m. every day, manage task status through ENABLE, DISABLE, and DROP, and monitor tasks combined with the USER_SCHEDULER_JOBS view.
Jan 02, 2026 am 02:03 AM
How to create and manage users and roles in an Oracle database
CreateuserswithCREATEUSER,assignprivilegesviaGRANT,andmanageaccessusingroles;forexample,createuserjohnwithquotaandunlockaccount,grantCREATESESSIONandCREATETABLEprivileges,createroleapp_developer,assignprivilegestotherole,grantroletouser,anduseALTERor
Jan 02, 2026 am 01:43 AM
How to use PL/SQL to write a stored procedure in an Oracle database
To write a PL/SQL stored procedure, you need to use CREATEPROCEDURE to define the structure, including parameters, variable declarations, business logic and exception handling; for example, raise_salary adjusts the salary by entering the employee ID and percentage, and handles exceptions during execution to ensure data consistency.
Jan 01, 2026 am 05:17 AM
How to migrate an on-premises Oracle database to Oracle Cloud Infrastructure (OCI)
Migrating a local Oracle database to OCI requires evaluating the version, scale, license and dependencies; 2. Choose the appropriate method: DataPump is suitable for downtime migration of small databases, RMAN is suitable for large database backup and recovery, and GoldenGate achieves near-zero downtime synchronization; 3. Create a target environment in OCI and configure the network and permissions; 4. Verify data consistency, application connections and failover after migration; 5. Optimize cloud performance and backup, and it is recommended to use autonomous databases to reduce operation and maintenance burden.
Jan 01, 2026 am 12:17 AM
How to build a CI/CD pipeline for Oracle database changes using Jenkins
StoreOracledatabasechangesinGitwithversionedscripts.2.CreateJenkinsfileforautomatedpipelinestages:checkout,validate,test,deploy.3.UseLiquibaseforchangemanagementandrollback.4.Securecredentials,addapprovalgates,andenableauditingandnotifications.
Dec 31, 2025 am 06:24 AM
How to implement Oracle Real Application Clusters (RAC) for high availability
OracleRACensureshighavailabilitybyallowingmultiplenodestoaccessasingledatabaseconcurrently,providingfaulttoleranceandloadbalancing.2.KeyrequirementsincludeOracleGridInfrastructure,sharedstorageviaASMorSAN,aprivateinterconnectfornodecommunication,anda
Dec 31, 2025 am 06:04 AM
How to use Oracle Flashback technology to recover from user errors
OracleFlashbackenablesquickrecoveryfromusererrorsbyrewindingdatabasechanges.First,verifyFlashbackisenabledviaSELECTflashback_onFROMv$database;andenableitinmountmodeifneeded.UseFlashbackQuerywithASOFTIMESTAMPtoretrievepastdata,suchasrecoveringrowsdele
Dec 30, 2025 am 04:23 AM
How to integrate Oracle database authentication with Active Directory
IntegratingOracleDatabasewithActiveDirectoryenablesuserstoauthenticateusingADcredentials,improvingsecurityandsimplifyingmanagement.2.Twomethodsareused:passwordsynchronizationwithexternalOSauthenticationorenterpriseusersecurityviaOracleInternetDirecto
Dec 30, 2025 am 12:39 AM
What are Oracle analytic functions?
Analyticfunctionscomputevaluesacrossrelatedrowswithoutgroupingthemintoasingleoutput,preservingindividualrecords.TheyusetheOVER()clausewithoptionalPARTITIONBY,ORDERBY,andwindowingtodefinethedatawindow.Unlikeaggregatefunctions,theyreturnmultiplerowsper
Dec 29, 2025 am 06:03 AM
How to migrate a Microsoft SQL Server database to Oracle using SQL Developer
Install OracleSQLDeveloper and configure the SQLServerJDBC driver; 2. Create a migration warehouse and connect the source and target databases; 3. Import SQLServer metadata, convert objects to Oracle syntax, and map to the target schema; 4. Generate DDL to create Oracle objects, migrate data and verify consistency; 5. Manually adjust complex logic such as stored procedures to ensure correct functionality.
Dec 29, 2025 am 03:46 AM
How to clone an Oracle PDB (Pluggable Database) for testing
TocloneanOraclePDBfortesting,ensureprerequisiteslikeSYSDBAprivilegesandsourcePDBavailability,thenuseCREATEPLUGGABLEDATABASE...FROMtocreateacopywithinthesameoranotherCDB,optionallyusingNOCOPYorFILE_NAME_CONVERTforefficiency,followedbyopeningthenewPDBa
Dec 28, 2025 am 05:18 AM
How to set up Oracle Active Data Guard for read-only reporting
To configure Oracle Active DataGuard, you must first ensure the enterprise version environment, version compatibility, and network connectivity; enable forced logging in the main database and configure archiving parameters; create a physical standby database by copying from the active database through RMAN; start the Redo application in the standby database, and then open and enable real-time applications in read-only mode; create and authorize reporting users, route queries to the standby database through OracleNet, and monitor application delays and synchronization status to achieve read-write separation and performance optimization.
Dec 28, 2025 am 03:47 AM
How to upgrade an Oracle database from 12c to 19c
Upgrading the Oracle database from 12c to 19c requires first verifying system compatibility, performing a full backup, running pre-upgrade tools and fixing problems; choosing an in-place or off-site upgrade method, using DBUA or manual scripts to implement the upgrade; after upgrading, recompile invalid objects, collect statistics, verify components, and test application functions.
Dec 27, 2025 am 05:11 AM
How to implement Transparent Data Encryption (TDE) in an Oracle database
Configuresqlnet.orawithwalletdirectory,thenrestartDB;2.CreateandopenkeystoreusingADMINISTERKEYMANAGEMENTwithpassword;3.Setmasterkeywithbackup;4.EncryptentiretablespaceviaCREATETABLESPACEwithENCRYPTIONorspecificcolumnsusingALTERTABLE...ENCRYPT;5.Reope
Dec 27, 2025 am 04:22 AM
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