Internet: request + transport = invariant
htm...@gmail.com
thus the most widespread transport protocol is HTTP,
and the most general format for data is XML (XHTML).
When we made
create table a (
id num primary key,
data float
);
create table b (
id num primary key,
ref num references a(id),
data float
);
create table c (
id num primary key,
link num references b(id),
data float
);
insert into a values (1, 12.3);
insert into b values (10, 1, 23.4);
insert into b values (20, 1, 34.5);
insert into b values (30, 1, 45.6);
insert into c values (100,10,56.7);
insert into c values (101,10,67.8);
insert into c values (200,20,78.9);
insert into c values (201,20,89.1);
insert into c values (300,30,91.2);
we need simple request 'a.b.c' to get
<a id=1 data=12.3>
<b id=10 data=23.4>
<c id=100 data=56.7/>
<c id=101 data=67.8/>
</b>
<b id=20 data=34.5>
<c id=200 data=78.9/>
<c id=201 data=89.1/>
</b>
<b id=30 data=45.6>
<c id=200 data=91.2/>
</b>
</a>
Request 'a.b.c' allow to avoid perl, php, etc
both outside DBMS (as script) and inside DBMS (as embeded perl),
that is very necessary for unskilled users!
Details are on:
http://sql40.chat.ru/site/sql40/en/author/introduction_eng.htm
http://sql40.chat.ru/site/sql40/en/author/determination_eng.htm
http://sql40.chat.ru/site/sql40/en/author/inout_eng.htm
User sends to remote database (HTTP will ask login):
c:/dir> xml2http.exe database.my.com username password a.xml
for example
c:/dir> dbf2xml.exe a.dbf | xml2http.exe database.my.com username
password
User sends to local database (at transformation of data between DBMS-
s):
c:/dir> xml2http.exe 127.0.0.1 username password a.xml
for example
c:/dir> dbf2xml.exe a.dbf | xml2http.exe 127.0.0.1 username
password
Database sends to local file (at transformation of data between DBMS-
s):
sql> copy a.b.c to filename.xml;
Database sends to remote database
(if fields username and password of table sys are equal null,
then database sends as 'anonymous'):
sql> update sys set
ral="database.remote.com",
username="tomson",
password="my_pwd";
sql> a.b.c ->;
or
sql> update sys set
ran="101.102.103.104",
username="tomson",
password="my_pwd";
sql> a.b.c ->;
or if you prefer to export per table
sql> update sys set ral="database.remote.com";
sql> create view av as select * from a where ...
sql> create view bv as select * from b where ...
sql> create view cv as select * from c where ...
sql> av ->;
sql> bv ->;
sql> cv ->;
P.S.
Please, prompt me free e-mail service for newsgroups
(i.e. i want to use SMTP/POP3 instead of NNTP or HTTP).
If you can prompt, write me to sq...@narod.ru.
Dmitry Turin
HTML6 (6.3.0) http://html6.by.ru
SQL4 (4.1.3) http://sql40.chat.ru
Unicode2 (2.0.1) http://unicode2.chat.ru
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