By Chip Dawes
This ebook comprises excellent idea of total Database proposal as DBA. it's very effortless to appreciate. The questions from the evaluation examination, 2 Bouns assessments and the chapters examination are very priceless that provide the real examination surroundings perform.
I had handed my examination with 96%. The questions from the genuine examination are little bit tough. All you might want to do is to appreciate the concept that from the booklet thoroughly.
Overall comment.. This publication is excellent so you might perpare for the examination.
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Additional resources for OCA: Oracle 10g Administration I Study Guide (1Z0-042)
Sample text
Com. Although the contents of the DBA_ and V$ metadata views are similar, there are some important differences between the two types. 4 compares these two types. 4 A Comparison of Data Dictionary and Dynamic Performance Views Dictionary Views Dynamic Performance Views The DBA_ views usually have plural names (for The names of the V$ views are generally singuexample, DBA_DATA_FILES). lar (for example, V$DATAFILE). The DBA_ views are available only when the database is open and running. Some V$ views are available even when the database is not fully open and running.
Scalability and performance improvements are largely based on Oracle’s grid computing model. Grid computing is intended to allow businesses to move away from the idea of many individual servers, each of which is dedicated to a small number of applications. When configured in this manner, applications often either do not fully utilize the server’s available hardware resources such as memory, CPU, and disk or fall short of these resources during peak usage. By comparison, databases running under Oracle’s grid computing model can be spread across as few or as many servers as needed so as to make the most efficient use of each of the available hardware resources at all times.
SQL> insert into DEPT (DEPTNO, DNAME, LOC) 2 values (’SIX’,’SHIPPING’,’MILWAUKEE’); values (’SIX’,’SHIPPING’,’MILWAUKEE’) * ERROR at line 2: ORA-01722: invalid number These are simplified examples. Oracle 10g can accommodate tables that have as many as 1,000 columns and billions of rows. See Chapter 3, “Database Storage and Schema Objects,” for more information about creating tables and other database objects. In addition to tables such as DEPT that store important business data, Oracle databases also contain system tables that store data about the database itself.