Re: SQL possible equivalent

From: DA Morgan <damorgan_at_psoug.org>
Date: Thu, 31 May 2007 10:30:44 -0700
Message-ID: <1180632643.201384@bubbleator.drizzle.com>

Jim Smith wrote:

> In message <1180572663.829947_at_bubbleator.drizzle.com>, DA Morgan 
> <damorgan_at_psoug.org> writes
>> euan.garden_at_gmail.com wrote:
>>> On May 30, 8:10 am, DA Morgan <damor..._at_psoug.org> wrote:

>>>> Jeff Kish wrote:
>>>>> I have a script for mssql serverthat checks to see if a table
>>>>> exists... if
>>>>> it does it drops it and recreates it.
>>>>> I'm wondering how to do this using only sql if possible. I can
>>>>> figure it out
>>>>> using pl/sql but I'm not sure of the correct approach (or even if
>>>>> it is
>>>>> possible) using just sql.
>>>>> I realize you can select from user_tab_cols like this:
>>>>> select table_name from user_tab_columns where upper(table_name) =
>>>>> 'ASSET'
>>>>> but how do I fit this into a sort of ifdef else sort of flow
>>>>> control in sql?
>>>>> Can someone point me in the right direction? Do I need to somehow
>>>>> insert
>>>>> pl/sql into the sql?
>>>>> thanks
>>>>> Jeff Kish
>>>> The issue isn't how ... the issue is why. Oracle is NOT a Microsoft
>>>> product rebranded. The concepts are different, the architecture is
>>>> different, and kludges such as the one you are asking about used
>>>> inSQL Serveronly because of its Ingres origins are possible but never
>>>> done by people who learn the product.
>>>>
>>>> So the answer is you can do it using Native Dynamic SQL but you should
>>>> instead learn Oracle unless you wish to write really really bad code.
>>>> --
>>>> Daniel A. Morgan
>>>> University of Washington
>>>> damor..._at_x.washington.edu
>>>> (replace x with u to respond)
>>>> Puget Sound Oracle Users Groupwww.psoug.org- Hide quoted text -
>>>>
>>>> - Show quoted text -

>>>  Ingres? Thats a new one, I suggest a little fact checking;
>>>  http://blogs.msdn.com/euanga/archive/2006/01/19/514479.aspx
>>
>> I agree as I am correct.
>>
>> Allow me to quote from:
>> http://www.referenceforbusiness.com/history2/49/Sybase-Inc.html
>>
>> Sybase was founded in 1984 by Mark Hoffman and Robert Epstein. Hoffman 
>> had previously worked as an executive at a company called Britton Lee, 
>> which pioneered the field of database computing. He joined Epstein, 
>> who had helped to create an early relational program called Ingres 
>> while working toward his Ph.D. at the University of California at 
>> Berkeley. Together, the two set out to market a cutting-edge 
>> relational database management system (RDBMS), which would organize 
>> information and make it available to many computers in a network.
>>
>> The origin of Sybase, with respect to concepts and architecture, is
>> Ingres and thus it too is the underlying foundation of SQL Server.
> 
> Just because there are links between companies doesn't mean the products 
> are related.
> 
> Having used all the products in question there are almost no 
> similarities between them.

One of the joys that comes from teaching is that one must learn about such things of academic interest.

Examine the concepts of Ingres, Informix, Sybase, and SQL Server (prior to 2005).

Examine the way they use terminology.
Examine the way they use log files.
Examine their locking.
Examine their transaction mechanisms.
Examine their security models.

If you find a significant difference I would very much like to hear about it.

-- 
Daniel A. Morgan
University of Washington
damorgan_at_x.washington.edu
(replace x with u to respond)
Puget Sound Oracle Users Group
www.psoug.org

Received on Thu May 31 2007 - 12:30:44 CDT