DSNless connection to SQL Server and Oracle

hi,
how can i connect to SQl Server and Oracle without specifying the DSN.
zulfgi

My favorite reply again:
Someone wrote in a newsgroup about configuring some kind of "temporary DSN".
His example was for Excel, but it will maybe work the same way for other drivers:
db = DriverManager.getConnection(
"jdbc:odbc:Driver={Microsoft Excel Driver (*.xls)};DBQ=c:/temp/test2.xls;DriverID=22;READONLY=false","","");
Also someone else suggested for SQLServer:
db = DriverManager.getConnection("jdbc:odbc:Driver={SQL Server};Server=MyServerName;Database=MyDataBase","","");
Find out the right driver clause for Oracle; look at the names the control panel ODBC manager shows.
Regards,
Hartmut

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Steps to change universe database connection from SQL server to Oracle 10

Hi,
we are moving from sql server to Oracle 10.Please let me know the steps and various parameters I should consider while changing universe database connection from SQL server to Oracle 10.
Following are the steps which I assumed :
1.     create a new Oracle database connection or edit the existing connection to point to Oracle server
2.     Need to check sql for each object, having integrity check for universe will solve the purpose of parsing each object
3.     Exporting the universe after integrity check
4.     Report data testing
Let me know if I miss on any steps.Also what all factors I need to consider while moving to Oracle for eg: what @ custom sql,what @ table names,what @ LOV etc.
Kindly reply

Thanks Abhijeet and Shreyash,
I will follow the steps you have suggested.
Actually I was searching for this on net and got to know that with Oracle database connection,theres lot of stuff needs to take care of in terms of custom sql and LOV and in our case,we have lot of custom sql for each object in the universe so just wanted to confirm.
I will do the changes and let you guys know in case theres any isuue specifically to Oracle.

Entity Framework - Code First - Migration - How to access SQL Server and Oracle using the same context?

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I use Entity Framework code first approach.
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Different output of same query in SQL Server and Oracle

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
     inner join (SELECT ROW_NUMBER() OVER (order by c1 ASC) AS c1 from table2) table2 on table2.c1=table1.c1
sql server output
c1     c2     c1
1     g     1
2     m     2
3     h     3
4     g     4
5     j     5
oracle output
C1 C2 C1
5 j 5
4 g 4
3 h 3
1 g 1
2 m 2
If you notice the first column in both output. It is sorted in sql server and not in oracle.
Why it is behaving differently in oracle? Is there any way I can solve this in oracle?
Thanks,
Jigs

It is NOT behaving "differently" in Oracle; you just haven't specified an order that you expect your results to be in, so you're going to get output in whatever order the database fancies displaying it (ie. no guarenteed order). This is an artifact of how the database chooses to put together the data, and different databases (or even datasets within the same database) can and most likely will behave differently.
Even SQL Server won't guarentee to always get your data in an ordered fashion if you exclude the order by clause, even if you think it has always output the data in an ordered fashion.
Your solution is to add an order by clause, in BOTH databases, to force the order of the output data.

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

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)
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Thanks in advance to this newbie. :)

SQL Server and Oracle are two completely different RDBMS'.
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I'm not sure what your code is supposed to be doing (I find SQL Server code awful to read, and never understand the need for "@" before variable names, that just seems to show a lazy parser (or lazy coder who designed the parser)).
From what I can guess it's going to be something like...
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
select my_master_key.nextval
into as_master_key
from dual;
-- In 11g you could replace this select with just:
-- as_master_key = my_master_key.nextval;
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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Hi,
We have a requirement to create ETL which can be run for both SQL Server and Oracle.
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I have the following scenario:
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Luis,
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http://download-east.oracle.com/docs/cd/B19306_01/server.102/b14232/gencon.htm#sthref343
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Regarding the tns-12541 error in connecting to sql server from oracle

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SQL query against tables on MS SQL Server and Oracle using Oracle BI

Hi All
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Many Thanks
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Hi Matt and Thomas
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Yes I have to do the join. Even worse I have to write an Aggregate query like this!
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Ashish

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Hi,
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There are 2 gateway - the commercial Database Gateway for Ms SQl Server which requires a license and the Database Gateway for ODBC which is for free. The license for DG4ODBC is included in your database license. You only need to install a suitable ODBC driver on your Linux box (for example use the MS SQl Server ODBC driver for Linux - details can be found here: http://www.microsoft.com/en-gb/download/details.aspx?id=36437 ). and then configure the gateway using the My Oracle Support Note:
How to Configure DG4ODBC on 64bit Unix OS (Linux, Solaris, AIX, HP-UX Itanium) to Connect to Non-Oracle Databases Post Install
[Article ID 561033.1]
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Hi,
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If the data is available in Oracle of what value is there in duplicating it in another product. Just learn how to do heterogeneous queries and leave the data where it is.

Use of SQL Server and Oracle Simultaneously

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Regards,

user650358 wrote:
I am able to retrieve with simple OUT Parameters from the stored procedure in the application without having to use refcursor. Is this a bad thing in the use of other data types instead of refcursors?
I was able to have only a varchar and this worked fine.PL/SQL is a formal procedural language with a number of object orientated programming features. Of course functions can return all kinds of data types - even objects and arrays and collections and pointers (called LOB locators).
All SQL in Oracle are parsed and stored in the server as cursors. The ref cursor data type in PL/SQL is a variable type that contains the handle of a cursor in the server - its "special ability" is passing this PL/SQL variable structure to a client (like Java or .Net) and have the client consume the output of the cursor.
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DSNless connection to SQL Server and Oracle

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