How to pass 1z0-047 sql expert exam

Bismillahir Rahmanir Raheem.

First of all, this exam title attracts many guys looking for some certificate.

Because the title specifies you as SQL expert guy.

To pass this exam you have to score atleast 66% out of 70 questions which means about 47 correct answers. 

After doing my Java Programmer certificate  I wanted to have this title.

So I purchased Steve O' Hearn book , which is very good one.

I already had some knowledge of SQL , but not much only about create,insert,update,delete and that also , not in depth knowledge.

It was not only the certificate , I also wanted to study sql in detail.

 What I used as Study Material

I prepared from Steve O'Hearn SQL expert exam book , this book does not contain everything.

Some of the topic is not there in this book but this is not much of issue , you can read it somewhere else

Its really not an issue.

I also used Jason Price 11g Database administrator book

Jason Price 11g SQL

and Roopesh Ramklass ,John Watson 11g SQL Fundamentals book 

Roopesh Ramklass John Watson 11g Fundamentals book 1z0-051

And I spent time searching on internet also , when I was not sure about some topics.

What is not there in Steve`s Book

View with grant option , read only option is not in this book

Alternative quote operator is not in this book

Single and Double Ampersand Substitution operator are not there in this book.

Although Updateable view is there in the book but you might not understand it .

And It might be possible that you don`t understand what you read from the book

topics like hierarchical retrieval It took me quite a time to understand how it works and prior keyword

Which topics took long time for me to understand

Various Timezone functions

Hierarchical retrieval , Reporting Aggregated data using Group Functions

Subqueries

Flashback Feature

Yes ! You can pass this exam 

Yes you can pass this exam. Yes exam is tough ,but you can still pass this exam.

All you have to do is to study hard ,  practice .

---------------Please Don`t Take this exam Lightly------------

If you take it , there is good amount of probability that you will fail  this exam

How much Time it will  take

I started one year before ,but not able to study regularly.

In between studied the book and left studied and left studied and left.

But then eventually I made My mind no matter what I am going to take this test in first week of April

I read some other guys stories , they only prepared for 1 months or even a weak or two.

And wrote the paper and passed it.

Don`t Hurry

Yes Don`t hurry.

It might happen that you get frustrated by keep studying books .

And not able to feel that confidance to pass the exam.

Don`t hurry by taking chance , hoping that you will pass this exam.

If you have good knowledge and lacking in some topics then you can still hope , but by not preparing for it and then hoping that you will pass this exam .I don`t think so thats going to happen

Take your time

About Real  Exam 

Two hours will be enough to answer every question

I was able to answer all question and review some questions .

But some questions were very ambiguous and that took some of my exam time.

In some questions not a single options seems to  be correct but then question asks you to select two correct answer , it was very scary.

So except ambiguous questions on exam and aim for scoring 100%.

When I left the exam center I felt and thought I failed this exam.

As I was not sure of many of my answers.

But with the grace of Allah I was able to pass.

I nearly passed this exam with 69% and I was aiming for 100%.

Good luck for your preparations , Believe in yourself and Go for it.

My OCAJP6 Java Certificate

Bismillahir Rahmanir Raheem.

Thanks To Almighty  Allah that I passed this exam.

I remember those days for preparing for this exam.

My SQL Expert Certificate

Bismillahir Rahmanir Raheem.

Thanks to All mighty dear Allah that I passed this exam.

I will  soon write a blog for the preparation of this exam.

Changing NLS_Language NLS_Territory NLS_Calendar

Bismillahir Rahmanir Raheem

When I installed my Oracle database I probably selected US or I think default installation is US.
But you can change it as you like later
We will  see how to change it

You can see all your NLS_parameters from a dynamic view called NLS_Parameters

select *
from NLS_Parameters;

You will see in the results parameters like
NLS_Language    AMERICAN
NLS_Calendar    GREGORIAN
NLS_Territory     AMERICA

and others

so lets change the default values

alter session set NLS_Language='Arabic';

alter session set NLS_Territory='United Arab Emirates';

alter session set NLS_Calendar='Arabic Hijrah';


 Similarly you can change any NLS_parameters as you like

You might  want to know what are the values that you can assign to these NLS parameters

here is link to oracle documentation to help you

Oracle Database Globalization Support

Working with oracle timezone format TZR TZH TZM

Bismillahir Rahmanir Raheem

Today we will look to some format that are used to convert or outputting more precise information.

TZH--
This gives the hour from the timezone and is only valid with timestamp and interval formats

TZM----
This gives the minute from the timezone and is only valid with timestamp and interval formats

TZR---
This gives the time zone region information and is only valid with timestamp and interval formats

alter session set time_zone='asia/calcutta';

select to_char(systimestamp,'TZR-TZH-TZM')
from dual;

this will give us

Asia/calcutta-+05-30

NOte-- remember all these formats are only valid with timestamp and interval types not with date type

INSERTING ROWs INTO TABLE FROM SELECTING ROWS FROM ANOTHER TABLE

Bismillahir Rahmanir Raheem

We will insert rows into a table from retreiving rows from another table

Create table table1(id number,name varchar2(20));

insert into table1 values(111,'Mahtab Alam');
insert into table1 values(222,'Aftab Alam');
insert  into table1 values(333,'Sdre Alam');

Now we have three rows in table1 .
Lets add these rows into table2

create table table2(RollNo number,Student_name varchar2(20));

insert into table2
select id,name
from table1;

or

create table table3(pid number);

insert into table3(pid)
select id
from table1;

Oracle To_date() function for converting into date datatype

Bismillahir Rahmanir Raheem

Suppose I have table Entry as

Create table Entry(Entered number);

insert into Entry values(12122012);
insert into Entry values(10102013);
insert into Entry values(11112013);

select * from Entry;





Now lets change it to some meaningful  way , lets change it to date which it actually represents

SELECT  ENTERED,TO_DATE(ENTERED,'DDMMYYYY')
FROM     ENTRY;