• Oracle

    Learn oracle MS SQL server DBA in short notes

    Oracle Short Notes   Database – It’s a collection of files. Physical file locations: Listener.ora, TNSname.ora – $ORACLE_HOME/network/admin/ Password & Parameter file – $ORACLE_HOME/dbs/ Control file – flash_recovery_area & /opt/oracle/oradata/   Instance – It’s a collection of SGA+BG process SGA – Shared pool, Database buffer cache, redo log cache, Java pool, large pool & stream pool Shared Pool – Most recently executed statements and definitions. Data Dictionary – most recently used definitions, including table, index & privilege. Library cache – most recently used SQL & PL/SQL statements Shared SQL area – Shared PL/SQL area Database buffer pool – It stores a copy of data block. Default, keep & Recycle –…

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