Oracle apex outside the database

What risks or impacts do you think if I plan to implement APEX outside the production database. Basically having a separate database all together and apex running into that seperate database. But a lot of source data is in the production database. So looking into this situation, what are the risks and concerns you might think of?
My team is not comfortable implementing apex inside the production database.

Hi
>
they never install anything on production databases, apex installs a lot of its own objects and they want to keep production bare bones.
>
I can see no real justoification to back this up. Ideally APEX should be running within the database where the data that it is accessing it resides. The objects that APEX creates are contained within its own schema and it doesn't take up much space at all.
By separating the APEX install to a different database, you create a whole new level of configuration headaches and things to go wrong.
>
my concern is about vendor level support and other issues
>
APEX is free as long as the database is sufficiently licensed - you don't need anything additional to have APEX running on a correctly licensed Oracle database.
It appears that 'they' have decided on a blanket rule through fear of breaking something (probably due to something having gone wrong once in the past). This is not the correct way to work. If they took the time to understand the technology that they are administering, they would see that an APEX installation should have pretty much zero impact on the production database.
We successfully run 3 APEX instances on the three production systems, each where the relevant data resides - 2 OLTP databases and a Data Warehouse.
Again, if they can come up with something specific rather than a sweeping statement and a suggestion to do it another way (using db links) with no reasoning or justification - it would be easier to allay their fears.
Cheers
Ben

Similar Messages

Can Discoverer have link to display documents stored outside the database?

I posted a message some time ago called "Possible for Discoverer to display BLOB type documents stored in database?" and got great answer.
Now our customers are asking if it is possible, from Discoverer, to link somehow to a file stored outside the database on the Unix file system and get their computer to display it? Can anyone tell me if this is possible please?
The only thing I've seen in the documentation that may be related is in Oracle Business Intelligence Discoverer Configuration Guide, section 10.6 List of Discoverer user preferences. It says there that Discoverer preference ProtocolList can be set so that Discoverer hyperlinks can be set to use protocols such as telnet, but the default is HTTP, HTTPS, and FTP.
THank you in advance if you can help.
Regards,
Julie.

Hi Rod,
I have tried the second method: "create a Oracle directory pointing to the Unix directory containing the files". I have had success with it, but I'd be grateful if you could advise me if you would have done this the same way as described below:
I put two Word docs and two text docs called clob_test1.txt, clob_test2.txt, blob_test1.doc, blob_test2 in the Unix directory corresponding to an Oracle directory called 'EIF'. I thought an extrenal table was needed so that Discoverer would have an object to write a queruy against. So I created a file called lob_test_data.txt with the following contents:
1,01-JAN-2006,text/plain,clob_test1.txt
2,02-JAN-2006,text/plain,clob_test2.txt
3,01-JAN-2006,application/msword,blob_test1.doc
4,02-JAN-2006,application/msword,blob_test2.
THen I created an external table using the following DDL:
CREATE TABLE jum_temp_lob_tab (
file_id NUMBER(10),
date_content DATE,
mime_type VARCHAR2(100),
blob_content BLOB
ORGANIZATION EXTERNAL
TYPE ORACLE_LOADER
DEFAULT DIRECTORY EIF
ACCESS PARAMETERS
RECORDS DELIMITED BY NEWLINE
BADFILE EIF:'lob_tab_%a_%p.bad'
LOGFILE EIF:'lob_tab_%a_%p.log'
FIELDS TERMINATED BY ','
MISSING FIELD VALUES ARE NULL
file_id CHAR(10),
date_content CHAR(11) DATE_FORMAT DATE MASK "DD-MON-YYYY",
mime_type CHAR(100),
blob_filename CHAR(100)
COLUMN TRANSFORMS (blob_content FROM LOBFILE (blob_filename) FROM (EIF) BLOB)
LOCATION ('lob_test_data.txt')
PARALLEL 2
REJECT LIMIT UNLIMITED
then created a Discoverer End User Layer folder against this external table, and used exactly the same technique as we did for downloading the BLOB from the database table (creating a new folder item containing a URL calling a database procedure which calls the Oracle code to download the doc). THis worked, but sometimes my PC didn't seem to know that the Word docs were Word docs and it needed to launch Word. Other times it did manage to do this OK. It always displayed the two .txt files as HTML docs.
Just wondered if you'd be good enough to critique this approach.
THank you, Julie.

Decrypting data from Oracle 8.1.7.4 outside the database

I need to decrypt some data that is DES encrypted using Oracle 8i (8.1.7.4) and the DBMS Obfuscation Toolkit, outside of the database where it was encrypted, and I hope someone here might have some hints on how I can achieve that.
I have currently experimented with both encrypting and decrypting the same data using the obfuscation toolbit, Perl (Crypt::CBC / Crypt::EBC) and PHP (mcrypt), getting pretty much identical results from the latter. They do, however, not match what I see using the obfuscation toolkit, so the must be something here I don't quite understand.
From what I have gathered, the obfuscation toolkit encrypts the data using
* CBC
* Initialization vector consisting of 8 chr(0)'s
* Padding using spaces to achieve an encryption string of a multiple of 8 bytes.
Below I'm including 1) The PL/SQL code which is used to encrypt the data (des_encrypt_hex()), 2) the PHP code I used to test encryption. When trying to encode the same string using the obfuscation toolkit and PHP, I end up with completely different HEX values. I have also tried several variations of both this PHP code and the Perl code, using various other kinds of padding and chaining modes, but no luck.
If anyone could give me some pointers as to what I am doing wrong here, I'd be really grateful.
1)
================================================================================
FUNCTION des_encrypt
( string_in in VARCHAR2) RETURN VARCHAR2
IS
l_data varchar2(2000);
key_check_flag number;
l_encrypted_string varchar2(2000);
BEGIN
-- the key and the input data must have a length
-- divisible by eight (the key must be exactly 8 bytes long).
l_data := RPAD(string_in,(TRUNC(LENGTH(string_in)/8)+1)*8,CHR(32));
key_check_flag := mod(length(des_key_string),8);
IF key_check_flag != 0 then
RAISE_APPLICATION_ERROR(-20199,'Key should be 8 char long');
END IF;
-- Encrypt the input string
DBMS_OBFUSCATION_TOOLKIT.DESENCRYPT
( input_string => l_data,
key_string => des_key_string,
encrypted_string => l_encrypted_string);
RETURN l_encrypted_string;
END;
FUNCTION des_encrypt_hex
( string_in in VARCHAR2) RETURN VARCHAR2
IS
l_encrypted_string varchar2(2000);
BEGIN
l_encrypted_string := des_encrypt(string_in);
l_encrypted_string := rawtohex(UTL_RAW.CAST_TO_RAW(l_encrypted_string));
RETURN l_encrypted_string;
END;
===============================================================================
And the way I call it:
DECLARE
     RETURN_VALUE VARCHAR2(2000) := '-';
     STRING_IN VARCHAR2(2000) := '12345678901';
BEGIN
     RETURN_VALUE := KATALOG.PKG_PRKCRYPTO.DES_ENCRYPT_HEX(STRING_IN);
     DBMS_OUTPUT.PUT('RETURN_VALUE: ');
     DBMS_OUTPUT.PUT_LINE(RETURN_VALUE);
     DBMS_OUTPUT.PUT('STRING_IN: ');
     DBMS_OUTPUT.PUT_LINE(STRING_IN);
END;
GO
===============================================================================
2)
<?php
$space = chr(32);
$null = chr(0);
$key = "xxxxxxxx";
$input = "12345678901$space$space$space$space$space";
$iv = "$null$null$null$null$null$null$null$null";
print bin2hex(mcrypt_cbc(MCRYPT_DES, $key, $input, MCRYPT_ENCRYPT, $iv));
?>

I might have been unclear in my initial post, but I do have the DES encryption key used on the Oracle side. If you got that part, then my question would be: Is the Oracle 8.1.7.4 DES encryption incompatible with every other DES encryption implementation out there?

Can I use Oracle APEX with MySQL Database

Hi All,
We are looking to create a performance dashboard using Oracle APEX for our client, but the application database is MySQL. Is it possible to create reports in APEX using data from MySQL database? If yes, are there any specific steps to be followed or any additional setups needed?
Any inputs would be really helpful.
Appreciate all the help
Thanks,
Sameer

Hi Sameer,
it's not possible to use apex on mysql, as stated above me by several persons.
If you havent got any oracle database in your organization, apex would be an expensive choise unless you use the free Oracle XE (express edition), which has APEX embedded.
There are some limitations to XE but with a bit of smart thinking it wouldnt be much of a problem.
[check the XE information here|http://download.oracle.com/docs/cd/B25329_01/doc/install.102/b25143/toc.htm#BABIECJA]
In short:
- XE will use 1 CPU even if you have two or more in your system
- There is a 4 GB data limit
- RAM memory usage is limited to 1 GB
- 1 installation per computer
You can use XE as a reporting database. This will relieve your mysql database from heavy reporting processes, too.
The XE can be used as a mini data warehouse. So you have to transfer and transform the relevant data from mysql to your XE instance.
After that you can start building report screens etc in the embedded Apex .
hope this helps you
Robin

Will Oracle look into the database buffer cache in this scenario?

hi guys,
say I have a table with a million rows, there are no indexes on it, and I did a
select * from t where t.id=522,000.
About 5 minutes later (while that particular (call it blockA) block is still in the database buffer cache) I do a
select * from t where t.id >400,000 and t.id < 600,000
Would Oracle still pick blockA up from the database buffer cache? if so, how? How would it know that that block is part of our query?
thanks

Without an Index, Oracle would have done a FullTableScan on the first query. The blocks would be very quickly aged out of the buffer cache as they have been retrieved for an FTS on a large table. It is unlikely that block 'A' would be in the buffer_cache after 5minutes.
However, assuming that block 'A' is still in the buffer_cache, how does Oracle know that records for the second query are in block 'A' ? It doesn't. Oracle will attempt another FullTableScan for the second query -- even if, as in the first query -- the resultset returned is only 1 row.
Now, if the table were indexed and rows were being retrieved via the Index, Oracle would use the ROWID to get the "DBA" (DataBlockAddress) and get the hash value of that DBA to identify the 'cache buffers chain' where the block is likely to be found. Oracle will make a read request if the block is not present in the expected location.
Hemant K Chitale
http://hemantoracledba.blogspot.com

How can i store oracle forms in the database.

hi,
i m using oracle 10g and forms 6i. is it possible to store the forms in the database, is it possible plz tell the steps.
with thanks and regads
anish kumar

It's possible to store any file in a database as a blob. The steps are the same for a FMX as it is for any other type of file.
See
http://www.dbasupport.com/oracle/ora9i/storing_word_docs.shtml
However, if you are doing this because you want to use Forms Builder to to query the database for a form and run it, then that may not be possible.

Reference images outside the database

Hi,
I tried to return html content from a pl/sql procedure but the images referenced were missing. Attached please see the part of the coding in the pl/sql procedure. Everything worked except the images. When I specified something like <img src="" />, the image would come up. Whenever I included an inline (or external) stylesheet in the pl/sql procedure, the images were not picked up.
Thanks.
Andy
Here is the code:
CREATE OR REPLACE PROCEDURE test_email AS
ret_code integer := -1;
begin
-- Send email
select db_mail.send_mail('[email protected]',
'test email',
'<html>
<head>
<title></title>
<style type="text/css">
div#pullquote
     background: #fff url(<reference image in another server>) no-repeat;
div#pullquote p
     padding: 0 20px;
div#pullquote h2
margin: 0;
     padding: 20px 20px 0 20px;
     background: url(<reference image in another server>) no-repeat 100% 0;
div#pullquote p.furtherinfo
     text-align: right;
</style>
</head>
<body>

<img src="http://<server name>:7778/i/themes/custom/hrims_logo.gif" alt="" class="left" />
     <div id="pullquote">
<h2></h2>
     <h3>this is a test</h3>
</div>

</body></html>',
'HRiMS',
'text/html')
INTO ret_code
FROM dual;
end test_email;

CREATE OR REPLACE PROCEDURE test_email AS
ret_code integer := -1;
begin
-- Send email
select db_mail.send_mail('[email protected]',
           'test email',
           '<html>
           <head>
           <title></title>
           <style type="text/css">
div#pullquote { background: #fff url(<reference image in another server>) no-repeat; }
div#pullquote p { padding: 0 20px; }
div#pullquote h2 { margin: 0; padding: 20px 20px 0 20px; background: url(<reference image in another server>) no-repeat 100% 0; }
div#pullquote p.furtherinfo { text-align: right; }
           </style>
           </head>
           <body>
           <div id="pullquote"><h2></h2>this is a test</div>
           
           </body></html>',
           'HRiMS',
           'text/html') INTO ret_code FROM dual; end test_email;The database version is 10.2.0.1.0.
I'm trying to use PL/SQL to generate email content in HTML.
Thanks.
Andy

Implementing A Group BY outside the database

Guys,
I have out today that I need to provide an implementation which allows dynamic Group by's to be proceessed in Java. I have looked at Hibernate but it does not support what I have in mind.
Ideally I have a result set of 1000 rows (say). I need to be able to add group by as well as aggregation to this result set. This can not be done at the database level.
Any ideas on how to approach - perhaps a database framwork which allows results to be processed.
Thanks

DuffyMo,
I have been visiting this site for well over 2 years and it is good to see you still particpating.
Thank you.
Ideally Hiberante would be great but I could not get anything concrete to work - The reason I ask to do this way - is becuase we are using a Microsoft stored procedure which has all the data in a non aggregarted realtion (table).
My application needs to display this data but there are rules like Grouping which need to be applied.
I think it is very difficuklt to write a group by in Java - Do you have any knowledge of wether Hibernate can process a stored proecdrue, possible many times (since it might be a group by on multiple columns)
Thanks

Storing attachments outside the database..??

Hi All,
We are working on R12.1.3 ,OEL 5.4.
My client wants to store the Ebs attachments on to the local file system rather than the database...!!!!
Is it possible to store the FND_LOB attachments to local disk...?
Please guide me...!
Thanks
RB
Edited by: R12DBA on Nov 14, 2010 7:47 AM

I do not know of a way of doing so using base functionality. One way would be to use a custom table that is externally defined, but this would mean a lot of custom code being written and maintained.
The space will be taken up regardless of where the files are stored - on the filesystem or the database. In addition, file stored on the filesystem are susceptible to possible virus attacks, while data in the database is not.
HTH
Srini

How to find Oracle script in the database

Hi,
I've an Oracle instance with Fine Grained Auditing (FGA).
In this DB was created a series of policies and now I want to find the scripts created for insert it in another database.
for example:
dbms_fga.add_policy (
.....................How can I find this SQL script from this database?
I have also export dmp file
Must I use TOAD for export the objects?
Thanks in advance!

you'll need to use datapump export/import for this, see the example below:
Create fga policy TEST_POLICY on table scott.emp
SQL> exec dbms_fga.add_policy(object_schema => 'SCOTT',object_name => 'EMP',policy_name => 'TEST_POLICY');
Show fga policy in the db
SQL> select * from DBA_AUDIT_POLICIES where policy_name = 'TEST_POLICY';
OBJECT_SCHEMA                  OBJECT_NAME                    POLICY_OWNER
POLICY_NAME                    POLICY_TEXT          POLICY_COLUMN                  PF_SCHEMA
PF_PACKAGE                     PF_FUNCTION                    ENA SEL INS UPD DEL AUDIT_TRAIL POLICY_COLU
SCOTT                          EMP                            OPS$ORACLE
TEST_POLICY
                                                              YES YES NO NO NO DB+EXTENDED ANY_COLUMNS
Now export the metadata for the objects
[oracle@mr-blonde 11.2.0]$ expdp / dumpfile=testpolicy.dmp directory=DATA_PUMP_DIR content=METADATA_ONLY SCHEMAS='OPS$ORACLE,SCOTT'
Export: Release 11.2.0.1.0 - Production on Mon Mar 29 11:22:25 2010
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
With the Partitioning, Automatic Storage Management, OLAP, Data Mining
and Real Application Testing options
FLASHBACK automatically enabled to preserve database integrity.
Starting "OPS$ORACLE"."SYS_EXPORT_SCHEMA_01": /******** dumpfile=testpolicy.dmp directory=DATA_PUMP_DIR content=METADATA_ONLY SCHEMAS=OPS$ORACLE,SCOTT
Processing object type SCHEMA_EXPORT/USER
Processing object type SCHEMA_EXPORT/SYSTEM_GRANT
Processing object type SCHEMA_EXPORT/ROLE_GRANT
Processing object type SCHEMA_EXPORT/DEFAULT_ROLE
Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA
Processing object type SCHEMA_EXPORT/TABLE/TABLE
Processing object type SCHEMA_EXPORT/TABLE/INDEX/INDEX
Processing object type SCHEMA_EXPORT/TABLE/CONSTRAINT/CONSTRAINT
Processing object type SCHEMA_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS
Processing object type SCHEMA_EXPORT/TABLE/COMMENT
Processing object type SCHEMA_EXPORT/TABLE/FGA_POLICY
Processing object type SCHEMA_EXPORT/TABLE/CONSTRAINT/REF_CONSTRAINT
Processing object type SCHEMA_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS
Master table "OPS$ORACLE"."SYS_EXPORT_SCHEMA_01" successfully loaded/unloaded
Dump file set for OPS$ORACLE.SYS_EXPORT_SCHEMA_01 is:
/app/oracle/admin/CS11G/dpdump/testpolicy.dmp
Job "OPS$ORACLE"."SYS_EXPORT_SCHEMA_01" successfully completed at 11:23:46
Now to drop the policy
SQL> exec dbms_fga.drop_policy (object_schema => 'SCOTT',object_name => 'EMP',policy_name => 'TEST_POLICY');
PL/SQL procedure successfully completed.
Now checking that the policy is really gone
SQL> select * from DBA_AUDIT_POLICIES where policy_name = 'TEST_POLICY';
no rows selected
Now to import the policy back into the db from the data pump export taken earlier
[oracle@mr-blonde 11.2.0]$ impdp / dumpfile=testpolicy.dmp directory=DATA_PUMP_DIR include=FGA_POLICY
Import: Release 11.2.0.1.0 - Production on Mon Mar 29 11:27:16 2010
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
With the Partitioning, Automatic Storage Management, OLAP, Data Mining
and Real Application Testing options
Master table "OPS$ORACLE"."SYS_IMPORT_FULL_01" successfully loaded/unloaded
Starting "OPS$ORACLE"."SYS_IMPORT_FULL_01": /******** dumpfile=testpolicy.dmp directory=DATA_PUMP_DIR include=FGA_POLICY
Processing object type SCHEMA_EXPORT/TABLE/FGA_POLICY
Job "OPS$ORACLE"."SYS_IMPORT_FULL_01" successfully completed at 11:27:21
Checking that the fga policy has been imported successfully
OBJECT_SCHEMA                  OBJECT_NAME                    POLICY_OWNER                   POLICY_NAME                    POLICY_TEXT
POLICY_COLUMN                  PF_SCHEMA                      PF_PACKAGE                     PF_FUNCTION                    ENA SEL INS UPD DEL
AUDIT_TRAIL POLICY_COLU
SCOTT                          EMP                            OPS$ORACLE                     TEST_POLICY
                                                                                                                            YES YES NO NO NO
DB+EXTENDED ANY_COLUMNS

Oracle apex how the region title i want to add one items

hi :
i have one page .this is page have 1)search region 2) report
in search region have the one select list contains the datas like a,b,c,d,e,f etc..
if i selectd the a and click query button in the report region page title ..i want add like REPORT ON a ..if i selected b and click the query it should display the REPORT ON b ....like this i want out put pls ..tell me how will do as soon as possible...

Sure it is possible. See this example:
http://htmldb.oracle.com/pls/otn/f?p=31517:99
There you have a select list and if you click on the button after choosing a value, you will
get a report on it.
Denes Kubicek
http://deneskubicek.blogspot.com/
http://www.opal-consulting.de/training
http://htmldb.oracle.com/pls/otn/f?p=31517:1
-------------------------------------------------------------------

Installing oracle application express from the database with oracle 11g

Hi,
I installed oracle 11g release 1 and trying to install oracle APEX from the database with Embedded PL/SQL gateway. The installation guide require grant connect privilege to any host for the APEX_030200 database user, but this schema does not exist in the database...
How to continue the installation of APEX ?

Thanks Hari,
But I need to enable network services in my database (oracle 11g).
Do I have to replace in the PL/SQL script below apex_030200 by flows_030000 ?
DECLARE
ACL_PATH VARCHAR2(4000);
ACL_ID RAW(16);
BEGIN
-- Look for the ACL currently assigned to '*' and give APEX_030200
-- the "connect" privilege if APEX_030200 does not have the privilege yet.
SELECT ACL INTO ACL_PATH FROM DBA_NETWORK_ACLS
WHERE HOST = '*' AND LOWER_PORT IS NULL AND UPPER_PORT IS NULL;
-- Before checking the privilege, ensure that the ACL is valid
-- (for example, does not contain stale references to dropped users).
-- If it does, the following exception will be raised:
-- ORA-44416: Invalid ACL: Unresolved principal 'APEX_030200'
-- ORA-06512: at "XDB.DBMS_XDBZ", line ...
SELECT SYS_OP_R2O(extractValue(P.RES, '/Resource/XMLRef')) INTO ACL_ID
FROM XDB.XDB$ACL A, PATH_VIEW P
WHERE extractValue(P.RES, '/Resource/XMLRef') = REF(A) AND
EQUALS_PATH(P.RES, ACL_PATH) = 1;
DBMS_XDBZ.ValidateACL(ACL_ID);
IF DBMS_NETWORK_ACL_ADMIN.CHECK_PRIVILEGE(ACL_PATH, 'APEX_030200', 'connect') IS NULL THEN
DBMS_NETWORK_ACL_ADMIN.ADD_PRIVILEGE(ACL_PATH,'APEX_030200', TRUE, 'connect');
END IF;
EXCEPTION
-- When no ACL has been assigned to '*'.
WHEN NO_DATA_FOUND THEN
DBMS_NETWORK_ACL_ADMIN.CREATE_ACL('power_users.xml','ACL that lets power users to connect to everywhere',
'APEX_030200', TRUE, 'connect');
DBMS_NETWORK_ACL_ADMIN.ASSIGN_ACL('power_users.xml','*');
END;
COMMIT;
Regards

How to Create Websheet in database application in Oracle Apex

I'm making a database to my new web site and now I'm developing a site with Oracle Apex.
The aim of my website provide free Oracle, Java, Unix education (videos, tutorials, articles, step-by-step instructions. etc).
My questions
- I created a database Application and I want create page as Oracle OBE where I will write/Save Subject name in database filed and all Subject Details Write/save in page as websheet Application(where I can add new section with all Document and image and save in page not in database)
i mean i want to make page as this
http://www.oracle.com/webfolder/technetwork/tutorials/obe/db/apex/r41/inst_pkgapp/inst_pkgapp.htm

Hi Prasad,
You can write normal JDBC code in your controller.
Check this Web Dynpro Java
You can use the tool for generating the classes from your DB.Check this too
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/dfad6017-0301-0010-bdb8-a8b7d2006f36
Best Regards, Anilkumar

Install oracle ilearning in the apex 4.1 oracle XE 10g

hi
i have a question can install in apex 4.1 oracle ilearning ?
the database it i have installed in the oracle XE 10g and in linux ubuntu 11.10
Screen
Edited by: 935459 on 20-05-2012 10:51 AM

What version of iLearning you are installing?
Please see these docs.
Oracle iLearning 5.0 Installation Guide [ID 297108.1]
Oracle Learning Management Integration with Oracle iLearning Viewlet [ID 210412.1]
Where Is Impementation Guide or Manual for Oracle iLearning? [ID 390675.1]
Recommended Patch List and Upgrade Path for Oracle iLearning [ID 880084.1]
Oracle iLearning Upgrade Guide - Release 5.2.1 [ID 870493.1]
Thanks,
Hussein

Questions on the comparison between Oracle Forms and Oracle APEX

Hi All,
The link below presents information about Oracle Application Express for Oracle Forms Developers, the table at the end of the page shows a comparison between Oracle Forms and Oracle APEX, all the points of comparisons are clear for me except 3 points which are:
•Locking, what is meant by locking models?
•Database Connections, what is meant by Synchronous/Asynchronous connections in Oracle Forms and Oracle Apex?
•Architecture, what is meant by 2tier and 3 tier connections?
http://www.oracle.com/technology/products/database/application_express/html/apex_for_forms.html
What I need is a simple explanation for these points without deep details.
Thanks

Hi
That is how I understand that document:
Locking: Forms, by default, locks a row as soon as the user starts modifying the data. That is pessimistic locking. Apex, on other hand (and optionally forms also) do not lock the record, but before applying any changes checks if the data has changed since the user queried it (what for some reason is called optimistic "locking")
DB connections: I am not sure why they used the terms synchronous/asynchronous, but the difference is that Forms, by default, keeps an permanent DB connection while the user is using the application, while Apex gets a connection from a connection pool every time a page is requested/submitted.
Architecture: Forms (in its web version at least) has 3 tiers: the browser, the appserver where the forms service runs and the database. As Apex runs inside the database, there are only 2 tiers: the browser and the database (though you still may need an http server in between which serves static content, I don't think it is considered part of the application in this context). If you are talking about client/server forms, then there are only 2 tiers.
I hope this helps!
Luis

Oracle apex outside the database

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