Comments on: select 1.x from t1 http://laurentschneider.com/wordpress/2008/01/select-1x-from-t1.html Oracle Certified Master Sun, 07 Sep 2008 07:25:24 +0000 http://wordpress.org/?v=2.0.5 by: Σωκράτης http://laurentschneider.com/wordpress/2008/01/select-1x-from-t1.html#comment-5802 Fri, 18 Jan 2008 07:33:17 +0000 http://laurentschneider.com/wordpress/2008/01/select-1x-from-t1.html#comment-5802 Laurent, thanks for that great link ! Σωκράτης Laurent,

thanks for that great link !

Σωκράτης

]]> by: Laurent Schneider http://laurentschneider.com/wordpress/2008/01/select-1x-from-t1.html#comment-5801 Fri, 18 Jan 2008 07:15:10 +0000 http://laurentschneider.com/wordpress/2008/01/select-1x-from-t1.html#comment-5801 I wrote about no space query before : <a href="http://laurentschneider.com/wordpress/2007/08/selectfromempwherescottenameanddeptno20.html" rel="nofollow"> select*from"EMP"where'SCOTT'="ENAME"and"DEPTNO"=20;</a> My opinion is still that spaces helps readability. Personaly I am quite greedy with spaces, so I would not write COS ( 0 ) but COS(0). About wasting your time, I am a big fan of solving <a href="http://projecteuler.net" rel="nofollow">math problems</a> with SQL 8-) I wrote about no space query before :

select*from”EMP”where’SCOTT’=”ENAME”and”DEPTNO”=20;

My opinion is still that spaces helps readability. Personaly I am quite greedy with spaces, so I would not write COS ( 0 ) but COS(0).

About wasting your time, I am a big fan of solving math problems with SQL 8-)

]]> by: Σωκράτης http://laurentschneider.com/wordpress/2008/01/select-1x-from-t1.html#comment-5797 Thu, 17 Jan 2008 21:14:38 +0000 http://laurentschneider.com/wordpress/2008/01/select-1x-from-t1.html#comment-5797 Come on, Mikito Harakiri, wasting our time is not only a side effect but the *sense* of dealing with SQL, programming languages and all the rest, isn't t ? Come on, Mikito Harakiri, wasting our time is not only a side effect but the *sense* of dealing with SQL, programming languages and all the rest, isn’t t ?

]]> by: Vadim Tropashko http://laurentschneider.com/wordpress/2008/01/select-1x-from-t1.html#comment-5795 Thu, 17 Jan 2008 19:52:23 +0000 http://laurentschneider.com/wordpress/2008/01/select-1x-from-t1.html#comment-5795 Sure there is an entertaining (and time consuming) explanation for each and every oddity, but how many developers really write a query without whitespace? I'm not aware of any modern programming language where whitespace is not a fundamental part of the syntax. Ditto for identifiers in quotes. Those should be deprecated (although was there a case when anything has been deprecated in SQL?) Sure there is an entertaining (and time consuming) explanation for each and every oddity, but how many developers really write a query without whitespace? I’m not aware of any modern programming language where whitespace is not a fundamental part of the syntax. Ditto for identifiers in quotes. Those should be deprecated (although was there a case when anything has been deprecated in SQL?)

]]> by: Ed Rusu http://laurentschneider.com/wordpress/2008/01/select-1x-from-t1.html#comment-5791 Wed, 16 Jan 2008 21:18:59 +0000 http://laurentschneider.com/wordpress/2008/01/select-1x-from-t1.html#comment-5791 Maybe we should have a separate discussion on sysdate@! thing ;) It was found when sysdate was used with db link. I.e. SQL> select sysdate from dual@db_link; produces the following SQL in remote database: SELECT SYSDATE@! FROM "DUAL" "A1" Ed Maybe we should have a separate discussion on sysdate@! thing ;)
It was found when sysdate was used with db link.
I.e. SQL> select sysdate from dual@db_link;
produces the following SQL in remote database:
SELECT SYSDATE@! FROM “DUAL” “A1″

Ed

]]> by: Stefan P Knecht http://laurentschneider.com/wordpress/2008/01/select-1x-from-t1.html#comment-5786 Wed, 16 Jan 2008 14:03:23 +0000 http://laurentschneider.com/wordpress/2008/01/select-1x-from-t1.html#comment-5786 Another little oddity. If you're setting event 10053 and run select sysdate@! from dual; All you get is an empty tracefile (on 10.2.0.3) -- seems the optimizer is choking on it ? Perhaps the "!" character has a special meaning (other than executing commands in your shell on *nix systems) ? Stefan Another little oddity. If you’re setting event 10053 and run

select sysdate@! from dual;

All you get is an empty tracefile (on 10.2.0.3) — seems the optimizer is choking on it ?

Perhaps the “!” character has a special meaning (other than executing commands in your shell on *nix systems) ?

Stefan

]]> by: Marco Gralike http://laurentschneider.com/wordpress/2008/01/select-1x-from-t1.html#comment-5782 Tue, 15 Jan 2008 23:25:52 +0000 http://laurentschneider.com/wordpress/2008/01/select-1x-from-t1.html#comment-5782 Currently I don't have a database at hand, so I can really test it, but regarding: select 1.dummy from “DUAL”"1″; Counting that the use of double quotas is a standard thing while for instance looking into the syntax of a dumpfile, generated by "exp". I would expect that "1" is regarded as a database link alias or such. With SQL*Net V1 this was the place to use the connection descriptor starting with the protocol (t for tcpip, d for dec, n for names - if I remember correctly). Therefore maybe the ORA-03001: unimplemented feature. Laurent are you sure you can't use double quotes in a table name? Didn't we wander these paths before...? Currently I don’t have a database at hand, so I can really test it, but regarding:

select 1.dummy from “DUAL””1″;

Counting that the use of double quotas is a standard thing while for instance looking into the syntax of a dumpfile, generated by “exp”. I would expect that “1″ is regarded as a database link alias or such. With SQL*Net V1 this was the place to use the connection descriptor starting with the protocol (t for tcpip, d for dec, n for names - if I remember correctly). Therefore maybe the ORA-03001: unimplemented feature.

Laurent are you sure you can’t use double quotes in a table name? Didn’t we wander these paths before…?

]]> by: Claudia Zeiler http://laurentschneider.com/wordpress/2008/01/select-1x-from-t1.html#comment-5781 Tue, 15 Jan 2008 17:13:29 +0000 http://laurentschneider.com/wordpress/2008/01/select-1x-from-t1.html#comment-5781 For what it's worth SQL> select sysdate from dual; SYSDATE --------- 15-JAN-08 SQL> select sysdate@ from dual; select sysdate@ from dual * ERROR at line 1: ORA-00923: FROM keyword not found where expected SQL> select sysdate@! from dual; SYSDATE@! --------- 15-JAN-08 SQL> select sysdate@1 from dual; select sysdate@1 from dual * ERROR at line 1: ORA-00923: FROM keyword not found where expected And I don't understand anything any more! For what it’s worth

SQL> select sysdate from dual;

SYSDATE
———
15-JAN-08

SQL> select sysdate@ from dual;
select sysdate@ from dual
*
ERROR at line 1:
ORA-00923: FROM keyword not found where expected

SQL> select sysdate@! from dual;

SYSDATE@!
———
15-JAN-08

SQL> select sysdate@1 from dual;
select sysdate@1 from dual
*
ERROR at line 1:
ORA-00923: FROM keyword not found where expected

And I don’t understand anything any more!

]]> by: Blog » Blog Archive » Oracle, white spaces and unexpected behaviour http://laurentschneider.com/wordpress/2008/01/select-1x-from-t1.html#comment-5778 Tue, 15 Jan 2008 11:47:33 +0000 http://laurentschneider.com/wordpress/2008/01/select-1x-from-t1.html#comment-5778 [...] Last week I saw the blog entry “select 1.x from t1” from Laurent concerning white spaces in select statements and Tom Kyte’s answer with a short explanation. Tanel Poder wrote a blog entry “Can you write a working SQL statement without using any whitespace?” too. [...] […] Last week I saw the blog entry “select 1.x from t1” from Laurent concerning white spaces in select statements and Tom Kyte’s answer with a short explanation. Tanel Poder wrote a blog entry “Can you write a working SQL statement without using any whitespace?” too. […]

]]> by: Laurent Schneider http://laurentschneider.com/wordpress/2008/01/select-1x-from-t1.html#comment-5777 Tue, 15 Jan 2008 08:56:55 +0000 http://laurentschneider.com/wordpress/2008/01/select-1x-from-t1.html#comment-5777 @matthias Probably in Oracle 17, "DUAL""1" will be a table called DUAL"1, in Oracle 11 and before, it is not possible to have a double quote in a table name @ed No idea ! @matthias
Probably in Oracle 17, “DUAL”"1″ will be a table called DUAL”1, in Oracle 11 and before, it is not possible to have a double quote in a table name

@ed
No idea !

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