Diff between oracle 8i sql Engine and oracle 9i sql Engine

hi,
1)Can anyone tell me difference between oracle8i sql engine and 9i sql engine.
2)Does oracle 9i uses the index defaultly if any primary key is there in table
Thanks
Rama

> 1)Can anyone tell me difference between oracle8i
sql engine and 9i sql engine.
They are different versions.
If you have been expecting a list of differences and enhancements and new product features... forget it. It will take several pages to list. Rather refer to the 9i product feature sheet.
> 2)Does oracle 9i uses the index defaultly if any
primary key is there in table
Huh? Oracle will use an index if it determines that it costs less to use that index to get to the data, than not using an index.

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NVARCHAR - NVARCHAR2 datatype mapping between sql server and oracle.

Question regarding size allocation that occurs for NVARCHAR columns in sql server to NVARCHAR2 in Oracle in the migration tool.
The migration tool has converted NVARCHAR columns to be twice their size as NVARCH2 in Oracle. Example, a table whose column is mycol NVARCHAR(40) gets migrated as mycol NVARCHAR2(80).
In SQL Server land, the designation of a column as NVARCHAR(40) will physically store the column as 80 bytes. However, as I understand from this excerpt (taken from here: http://www.oracle.com/technology/oramag/oracle/03-nov/o63tech_glob.html), that Oracle in essence will do the same thing for NVARCHAR2:
To make it easy to allocate proper storage for Unicode values, Oracle9i Database introduced character semantics. You can now use a declaration such as VARCHAR2(3 CHAR), and Oracle will set aside the correct number of bytes to accommodate three characters in the underlying character set. In the case of AL32UTF8, Oracle will allocate 12 bytes, because the maximum length of a UTF-8 character encoding is four bytes (3 characters * 4 bytes/character = 12 bytes). On the other hand, if you're using AL16UTF16, in which case your declaration would be NVARCHAR2(3), Oracle allocates just six bytes (3 characters * 2 bytes/character = 6 bytes). One difference worth noting is that for UTF-8, a declaration using character semantics allows enough room for surrogate characters, whereas for UTF-16 that is not the case. A declaration such as NVARCHAR2(3) provides room for three UTF-16 code units, but a single supplementary character may consume two of those code units.
As I read this, NVARCHAR(40) in sql server should be equivalent to NVARCHAR2(40) in Oracle and not NVARCHAR2(80) as it gets translated to - am I missing something? We have a rather large database to migrate so I need to get this size allocation right (and I obviously don't want to truncate any data).
Thanks -

Right - well, that's what I'm suggesting is that NVARCHAR(8) in SQL Server is equivalent to NVARCHAR2(8) in Oracle. Truncation will occur after 8 of any character, including, say, double byte Kanjii characters, which would physically store 16 bytes in the NVARCHAR(8) NVARCHAR2(8) column defn. I tried that in both SQL Server and Oracle, and the behavior is the same.
Also, technically, NVARCHAR2(8) and VARCHAR2(8 CHAR) is roughly the same in terms of behavior, except that in the first case, the physical storage is 16 bytes, while in the second case, it's 24 bytes (to account for 'supplemental' characters or true UTF-8 compliance). Same truncation occurs after 8 of -any- character be it single byte ascii or double byte kanjii, which is the behavior I expect.
Thanks for looking into this. What I decided to do was the following:
What was originally defined in SQL Server as varchar (and translated to VARCHAR2 with the CHAR designation), I removed the CHAR designation since I truly want that number of bytes to be stored, and not characters (for columns I do not care about UTF8 or 16 compliance - that will also mimic the same behavior I currently have on the SQL Server side. For anything that was nvarchar in SQL Server, I went ahead and created them as VARCHAR2 with the CHAR designation, with the same size (not double the value as was in SQL Server which the documentation says it gets translated to). I did this since we probably will need true UTF-8 compliance down the line, and since I had the hood open, it was easy enough to do. I could also have converted NVARCHAR(n) to NVARCHAR2(n) (and not n*2) as what was happening in the migration.
I tested strings in both cases, and I think I have my solution.
Edited by: kpw on Sep 24, 2008 11:21 AM

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Hi all,
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Hi Justin Cave,
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Gopal Mani

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Hello,
I use Entity Framework code first approach.
My project is working fine with SQL Server. But, I want to access Oracle too. I want to switch SQL Server and Oracle in run time.
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David http://blogs.msdn.com/b/dbrowne/

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I have two tables table1 and table2
--table1 has two columns c1 int and c2 varchar. there are not constraints added in it. it has data as given below
c1     c2
6     d
5     j
102     g
4     g
103     f
3     h
501     j
1     g
601     n
2     m
--table2 has only one column c1 int. there are not constraints added in it. it has data as given below
c1
6
1
4
3
2
now when i run below given query in sql server and oracle it gives me different result
select *
from table1
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sql server output
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3     h     3
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oracle output
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Thanks,
Jigs

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Compare SQL Server and Oracle syntax

Hello, I am very new to the Oracle DB as I have been working with MS SQL Server for many years. I have a SQL statement that works fine in MSSQL but seems to not work in Oracle. Is this a syntax problem or do I need to look elsewhere?
DECLARE @as_master_key varchar(26)
EXEC [dbo].[GET_UNIQUE_MASTER_KEY]
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Thanks in advance to this newbie. :)

SQL Server and Oracle are two completely different RDBMS'.
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SQL code...
create or replace sequence my_master_key;PL/SQL code...
DECLARE
as_master_key number;
as_project_name varchar2(20) := 'CMDEMO';
as_database_site varchar2(20) := 'CMPL';
as_user_initials varckar2(5) := 'SK';
as_table varchar2(30) := 'SUBMITTAL_CATEGORY';
BEGIN
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into as_master_key
from dual;
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END;This get's a unique sequence value into a variable and declares all the other variables. What you want to do with them after that I don't know.

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We have some tables to be filled from operational database to data warehouse using business requirement.Our goal is to create code which should be database independant.
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answered

Error oracle.sql.* and oracle.jdbc.driver.* not found when using oracle as a database

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import java.math.*;
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For the JDBC Thin Driver, or Server-side Thin Driver:
Connection conn = DriverManager.getConnection(
"jdbc:oracle:thin:@<database>",
"scott", "tiger");
where <database> is either a string of the form
<host>:<port>:<sid> or a SQL*net name-value pair.
For the JDBC Server-side Internal Driver:
Connection conn = DriverManager.getConnection(
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Note that the trailing ':' character is necessary. When you use
the Server-side Internal Driver, you always connect to the
database you are executing in. You can also do this:
Connection conn
= new oracle.jdbc.driver.OracleDriver().defaultConnection();
Hope this helps,
Thanks,
Anupama wrote:
I am using oracle as database and weblogic 4.5. I have copied the classes12.zip file in lib directory of weblogic. I am getting the error that oracle.sql.* and oracle.jdbc.driver.* not found when i am importing these packages in a jsp file. what i need to do to import oracle driver packages?I put it in the classpath also.
Please Advice!
Thanks in advance
AnuPama--
Apurb Kumar

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Rehan

>
well old way of development (Forms & Reports) will be obsolete in Oracle Fusion Middleware vs Oracle EBS
>
not quite true
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>
well old way of development (Forms & Reports) will be obsolete in Oracle Fusion Middleware vs Oracle EBS, as it is based on Java, OAF and ADF.
>
not quite true
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zulfgi

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Oracle Single Sign on and Oracle Internet Directory

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[email protected]

Hi Tim,
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This forum is intended for members to provide feedback and
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Running Tuxedo8.0 on oracle 8.1.6 and oracle 10.2.0.2.0 on the same machine

Hello,
I have oracle 8.1.6 64 bit and oracle 10.2.0.2.0 64 bit
running on the same hp UX 11i 64-bit machine
I have installed Tuxedo 8.0 32bit on the same machine.
I have a working tuxedo 8.0 environment running against the 8.1.6 oracle
database
in the Tuxedo .../udataobj/RM file I have for the 8.1.6 environment the string
Oracle_XA:xaosw:-L${ORACLE_HOME}/lib -lclntsh
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lib and lib32
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to the lib32 directory ?
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Ora10_XA:xaosw:-L${ORACLE_HOME}/lib32 -lclntsh
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ORACLE XA: Version 10.2.0.1.0. RM name = 'Oracle_XA'.
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Jyri,
The information before the first colon in the $TUXDIR/udataobj/RM file is
only used by the buildtms, buildserver, and buildclient programs to find the
line corresponding to the value of the -r option, so it should be OK to
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The information specfied in the OPENINFO string in the *GROUPS section of
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applicatino. The "xaogetmod: XAER_INVAL: Invalid xa_info string" error you
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possible to use multiple RMs or multiple versions of the same RM on the same
machine.
The syntax of the open string and the list of libraries to link with is
specified in the "Oracle Database Application Developer's Guide -
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<Jyri Elomaa> wrote in message news:[email protected]...
Hello,
I have oracle 8.1.6 64 bit and oracle 10.2.0.2.0 64 bit
running on the same hp UX 11i 64-bit machine
I have installed Tuxedo 8.0 32bit on the same machine.
I have a working tuxedo 8.0 environment running against the 8.1.6 oracle
database
in the Tuxedo .../udataobj/RM file I have for the 8.1.6 environment the
string
Oracle_XA:xaosw:-L${ORACLE_HOME}/lib -lclntsh
In oracle 8.1.6 home there are directories lib and lib64
but in oracle 10.2.0.2.0 home there are directories
lib and lib32
what string should I use for the oracle 10.2.0.2.0?
Oracle_XA:xaosw:-L${ORACLE_HOME}/lib32 -lclntsh maybe???
Must the string in the RM file for oracle always begin with the string
Oracle_XA?
If so is, possible at all to run the the binaries of one Tuxedo
installation
against two different databases versions because the RM strings are
similar in
the beginning but in 8.1.6 refer to the lib directory and in 10.2.0.2.0
refer
to the lib32 directory ?
Or do I need to have two installations of tuxedo8.0 binaries on the
machine?
I have tried to for 10.2.0.2.0 the line (the Ora10_XA is only a try...)
Ora10_XA:xaosw:-L${ORACLE_HOME}/lib32 -lclntsh
in the RM file but when starting tuxedo I get:
$ cat /mnt04/edu/ressu/bin/xa_NULL06092006.trc
ORACLE XA: Version 10.2.0.1.0. RM name = 'Oracle_XA'.
111035.16584.0:
xaogetmod: XAER_INVAL; Invalid xa_info string.
Any comments on the matter appreciated.
rgds,
Jyri

Diff between oracle 8i sql Engine and oracle 9i sql Engine

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