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Oracle Architecture - Explained In Detailed - Administration I

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Figures shown in these notes are from Oracle® Database Concepts 11 g Release 2 Objectives These notes introduce the Oracle server architecture.   The architecture includes physical components, memory components, processes, and logical structures. Primary Architecture Components The figure shown above details the Oracle architecture. Oracle server :   An Oracle server includes an Oracle Instance and an Oracle database .   ·         An Oracle database includes several different types of files:   datafiles, control files, redo log files and archive redo log files.   The Oracle server also accesses parameter files and password files.   ·         This set of files has several purposes.   o    One is to enable system users to process SQL statements.   o    Another is to improve system performance.   o    Still another is to ensure the database can be recovered if there is a software/hardware failure. ·         The database server must manage large amo
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Oracle Database SQL - Practise - Question - Scott Schema Examples

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Oracle SQL Practice Questions for Students All Question are Based on Scott Schema Exhibits EMP TABLE Exhibits DEPT TABLE Exhibits SALGRADE TABLE Question 1) Display all the records in emp table? 2) Display all the records in emp table where employee belongs to deptno 10? 3) Display all the records in emp table where employee does not belong to deptno 30? 4) Display total number of records in Emp table? 5) Display emp table with salary descending order? 6) Display first five records in employee table? 7) Display all the records in emp table order by ascending deptno, descending salary? 8) Display all employees those who were joined in year 1981? 9) Display COMM in emp table. Display zero in place of null. 10) Display the records in emp table where MGR in 7698,7566 and sal should be greater then 1500 11) Display all employees where employees hired before 01-JAN-1981 12) Display all employees with
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Step by Step - How to resolve redo log file corruption using ALTER DATABASE CLEAR UNARCHIVED LOGFILE command

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