Presentation

Download Report

Transcript Presentation 

INTRODUCTION
GUEST SPEAKER: DAWAR NAQVI
OCCUPATION: ORACLE SPEACILIST,
LOS ANGELES COUNTY, DEPARTMENT OF
HEALTH SERVICES
Objectives
•
•
•
•
•
•
•
ORACLE VS OTHER
COMMON SQL TIPS
MAKE YOU THINK
DATE QUERIES
SPELLING OUT A NUMBER
SQL QUERY to SPELL THE NUMBER
TO CREATE A EXCEL SPREAD SHEET VIA
SQLPLUS
• WRAP UP --- QUESTION & ANSWERS
ORACLE VS OTHER
Informix and Ingress -- they do not
exist as entities any longer. They
have been bought by companies that
already have database products of
their own. I'm not sure if you will
recognize Informix 3 years from now
or maybe you will (as it will be
exactly the same as it is now).
Sybase Well, I spend a large amount of
my time helping people convert from
Sybase to something else. Since they
sold themselves to MS a couple of years
back and MS built a better sqlserver
then sqlserver, they sort of put
themselves out of the database
business. I do not know personally of
anyone doing new development with this
product.
DB2 they have taken the "we'll build a
database for every problem" approach. Ask
them how many database products they
actually have (and be sitting down when you do
this as it will take a while to go through the
list). Even DB2 doesn't mean "DB2" -- the
different flavors of DB2 are incompatible
with each other (different features and
functions).
MS this is easy. Oracle is available on every
platform of any worth. It always has been,
always will be. 10 years ago, NT stood for NOT
THERE. Unix was king. Go back 5 more years.
Unix was just becoming cool, VAX VMS ruled,
mainframes were starting to be considered
that old stodgy technology (remember, PCs
were still just starting to appear everywhere
then as well). 5 Years before that -mainframes ruled, mini computer systems just
starting out. Now, fast forward 5 years from
now.
To paraphrase and twist a famous commercial ask
yourself "where do you want to be". In 5 years, I'll
bet Windows is not the place - it'll be replaced by
some new hardware/software combo and then where
are you? you are with a database that limits you to
exactly one OS -- their OS.
That is the major, #1 difference between Oracle and
other.
If anyone feels Windows is the Platform of the 21st
century..... and always will be, I guess its a safe choice.
If they look at history, really look at it, they might
begin to feel a little different.
SQL and Some tips
• select * from v$version;
• select sysdate from dual;
• select * from
nls_session_parameters where
parameter = NLS_DATE_FORMAT';
Make You Think
Mode of numbers
12876, 12874, 12000, 12222
I would like to round off to the multiples
of ten, if the last number is less than 5
make it to next lower of 10. or if it is
more than 5 than next higher of 10.
12880, 12870, 12000, 12220
SQL>
select round (12876, -1), round (12874,-1)
from dual;
ROUND(12876,-1)
--------------12880
ROUND(12874,-1)
--------------12870
Date Queries
SQL> select to_char(sysdate,'j') from dual;
TO_CHAR
------2454207
1 row selected.
SQL> select to_date(2454207,'j') from dual;
TO_DATE(2
--------16-APR-07
1 row selected.
J instead for “Julian calendar”
http://en.wikipedia.org/wiki/Julian_calendar
SPELLING Out a Number
SQL> select to_char(sysdate,'J'),to_char(sysdate,'Jsp') from
dual;
TO_CHAR TO_CHAR(SYSDATE,'JSP')
------- ----------------------------------------------------------------------------2454207 Two Million Four Hundred Fifty-Four Thousand Two
Hundred Seven
1 row selected.
create or replace function spell_number(
p_number in number ) return varchar2
as
type myArray is table of
varchar2(255);
l_str myArray := myArray('',
' thousand ’,'million',
' billion ', ' trillion ',
'quadrillion ', ' quintillion ',
' sextillion ', ' septillion ',
' octillion ', ' nonillion ',
' decillion ', ' undecillion ',
' duodecillion ' );
l_num varchar2(50) default trunc(
p_number );
l_return varchar2(4000);
begin
for i in 1 .. l_str.count
loop
exit when l_num is null;
if ( substr(l_num, length(l_num)-2, 3) <> 0 )
then
l_return := to_char(
to_date(
substr(l_num, length(l_num)-2, 3),
'J' ), 'Jsp' ) || l_str(i) || l_return;
end if;
l_num := substr( l_num, 1, length(l_num)-3 );
end loop;
return l_return;
end;
/
Function created.
SQL Query to spell the number
select
spell_number(12345678901234567890123456789012345678 )
from dual;
SPELL_NUMBER(12345678901234567890123456789012345678)
-----------------------------------------------------------------------------Twelve undecillion Three Hundred Forty-Five decillion Six Hundred
Seventy-Eight nonillion Nine Hundred One octillion Two Hundred
Thirty-Four septillion Five Hundred Sixty-Seven sextillion Eight
Hundred Ninety quintillion One Hundred Twenty-Threequadrillion
Four Hundred Fifty-Six trillion Seven Hundred Eighty-Nine billion
TwelvemillionThree Hundred Forty-Five thousandSix Hundred
Seventy-Eight
TO Create a Excel SpreaD
SheeT VIA SQLpluS
SQL> SET MARKUP HTML ON ENTMAP ON
SPOOL ON PREFORMAT OFF
SQL&gt; SPOOL c:\temp\test_xls1.xls
<br>
SQL&gt; select * from scott.emp;
SQL&gt; SPOOL OFF
<br>
SQL&gt; SET MARKUP HTML OFF ENTMAP
OFF SPOOL OFF PREFORMAT ON
Result
EMPNO
ENAME
JOB
MGR
HIREDATE
SAL
COMM
DEPTNO
7369
SMITH
CLERK
7902
17-Dec-80
800
20
7499
ALLEN
SALESMAN
7698
20-Feb-81
1600
300
30
7521
WARD
SALESMAN
7698
22-Feb-81
1250
500
30
7566
JONES
MANAGER
7839
2-Apr-81
2975
7654
MARTIN
SALESMAN
7698
28-Sep-81
1250
7698
BLAKE
MANAGER
7839
1-May-81
2850
30
7782
CLARK
MANAGER
7839
9-Jun-81
2450
10
7788
SCOTT
ANALYST
7566
19-Apr-87
3000
20
7839
KING
PRESIDENT
17-Nov-81
5000
10
7844
TURNER
SALESMAN
7698
8-Sep-81
1500
7876
ADAMS
CLERK
7788
23-May-87
1100
20
7900
JAMES
CLERK
7698
3-Dec-81
950
30
7902
FORD
ANALYST
7566
3-Dec-81
3000
20
7934
MILLER
CLERK
7782
23-Jan-82
1300
10
20
1400
0
30
30
Wrap Up
• Questions and Answers
Good Luck