Oracle Database 11g: SQL Fundamentals I 1Z0-051 Question

i bought the OCA Oracle Database 11g: SQL Fundamentals I Exam Guide (Exam 1Z0-051) and i am not sure do i have to read the whole book ! or just go through the exam objectives table ? because the book covers lots of topics that's not in the exam and i am kind of tight on time if any one had the book or used it pls help
To make it more clear i have a table in the book that shows each exam topic with page number next to it Like this:
Restricting and Sorting Data
[ ]      Limit the rows that are retrieved by a query Pg:104
[ ]      Sort the rows that are retrieved by a query Pg:136
[ ]      Use ampersand substitution to restrict and sort output at runtime
Using Single-Row Functions to Customize Output
[ ]      Describe various types of functions available in SQL Pg:170
[ ]      Use character, number, and date functions in SELECT statements Pg:177
Edited by: user7804566 on 01-Mar-2009 02:00

Yes indeed. Practice at work (and elsewhere) is the best way to learn and ro reinforce learning.
However, the more you read, the more you will be exposed to ideas and variations. Eventually you will find that many of the books have errors in various places. You will be winning when you are able to read and identify the errors AND explain why they are errors.
The way your original question was written implied that you were after the minimum effort to pass an exam. Your last reply implies a different, and better, attitude.
My suggestion therefore is to concentrate on the actual examples, but as quickly as possible expand to areas of interest. Explore as much as you possibly can, but make it a 'learning exploration' byut asking yourself questions and then investigating what the answer is.
Also note that in Oracle nearly every answer has an exception. The best of the best know this and try very hard to understand when things go according to plan and when (and why) expections occur.

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    Page 2-18
    create table test1 (
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    col2 NUMBER,
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    CONSTRAINT ck1 CHECK (pk > 0 and col1 > 0),
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    Page 2-22
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    create table new_emp
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    constraints - in our case the constraint is primary key. After that, we create nonunique
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    *14. Is my explanation correct?*
    "in which case having a unique index on the primary key will still cause the data to be
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    *15. Data to be verified against what? Is it to be verified whether its NULL or NOT NULL? I*
    know primary key does not take NULL and every value must be unique.
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    I do not think we need step two, we could do the following:
    1. create the table
    create table new_emp
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    first_name varchar2(10)
    "You may want to disable the constraints while performing the load and then enable them"
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    2. create the primary key
    alter table new_emp ADD primary key (employee_id);
    *17. The above steps are as efficient as the three steps i mentioned above. The only difference*
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    Page 2-23
    CREATE INDEX upper_dept_name_idx ON dept2(UPPER(department_name));
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    select *
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    ORDER BY UPPER (last_name);
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    Another related topic statement that i do not get it yet:
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    Lets go back the above query:
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    *indexes with columns marked DESC as function-based indexes."?*
    Page 2-27
    Regarding FLASHBACK TABLE, you can invoke a flashback table operation on one or more
    tables, even on tables in different schema. You specify the point in time to which you
    want to revert by providing a valid timestamp. By default, database triggers are disabled
    for all tables involved. You can override this default behavior by specifying the ENABLE
    TRIGGERS clause.
    "By default, database triggers are disabled for all tables involved. You can override this
    default behavior by specifying the ENABLE TRIGGERS clause."
    *21. What are database triggers?*
    *22. About External Tables. What are external tables? When is it used in real-life? Why do*
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    Page 2-30
    Oracle server provides two major access drivers for external tables. They are
    ORACLE_LOADER access driver and ORACLE_DATAPUMP access driver. ORACLE_DATAPUMP used to
    both import and export data using a platform-independent format.
    "platform-independent format."
    *23. What is the format? Is it .dat?*
    Page 2-35
    CREATE TABLE oldemp ( fname char(25), lname char(25) )
    ORGANIZATION EXTERNAL
    (TYPE ORACLE_LOADER
    DEFAULT DIRECTORY emp_dir
    ACCESS PARAMETERS
    (RECORDS DELIMINATED BT NEWLINE
    NOBADFILE
    NOLOGFILE
    FIELDS TERMINATED BY ',' (fname POSITION (1:20) CHAR, lname POSITION (22:41) CHAR)
    LOCATION ('emp.dat') )
    PARALLEL 5
    REJECT LIMIT 200;
    *24. Can you please explain the below part:*
    ACCESS PARAMETERS
    (RECORDS DELIMINATED BT NEWLINE
    NOBADFILE
    NOLOGFILE
    FIELDS TERMINATED BY ',' (fname POSITION (1:20) CHAR, lname POSITION (22:41) CHAR)
    *25. Can you please explain what is PARALLEL 5? and Why do we need it?*
    Again, any help is appreciated...
    Edited by: user11164565 on Jul 21, 2009 4:41 AM

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