How to Generate Unique Serial No in Oracle 6i report

Hi
I want to generate a unique serial no for every row ,
how can i achieve this result.
thanx in advance

You can also use the analytical function ROW_NUMBER in your query
SELECT ...
ROW_NUMBER() OVER (ORDER BY YOURORDERBY) RN
FROM TABLE
ORDER BY RN;

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How to generate sepecific serial numbers?

We want to generate specific serial number for item from paraemters, don't want to use the prefix or start number of item attribute.
Serial Number should generated not associated with transactions. And Item attribute defined as "PRE-DEFINDED"
And we do not want to insert basis table MTL_SERIAL_NUMBERS.
We need API or Interface to do this.
Is there anyone can help me?

randy_ortan wrote:
How to generate unique random numbers with out repetitions.The simplest way is to load the numbers 1 to 9 into an ArrayList. Then you use the Collections.shuffle method to shuffle the ArrayList numbers into random order. Finally you pick the 5 first numbers in the ArrayList. They will be unique and randomly picked from the 1 to 9 interval.
If you want another 5 numbers you just reshuffle the ArrayList and pick the 5 first numbers again.

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I have a database of Oracle 8.1.6,now want to generate script file (including table structure,index,etc.) from it,What should I do?
Thanks.

Your question pertains to the Database Export/Import. This forum exclusively focusses on the export/import utilities that come along with "Oracle Portal" which is a web-based tool. Could you please post your question under the RDBMS export/import or migration forum.

How to generate a second csv file with different report columns selected?

Hi. Everybody:
How to generate a second csv file with different report columns selected?
The first csv file is easy (report attributes -> report export -> enable CSV output Yes). However, our users demand 2 csv files with different report columns selected to meet their different needs.
(The users don't want to have one csv file with all report columns included. They just want to get whatever they need directly, no extra columns)
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Hello,
I'm doing it usually. Typically example would be in the report only the column "FIRST_NAME" and "LAST_NAME" displayed whereas
in the csv exported with the UTL_FILE the complete address (street, housenumber, additions, zip, town, state ... ) is written, these things are needed e.g. the form letters.
You do not need another page, just an additional button named e.g. "export_to_csv" on your report page.
The csv export itself is handled from a plsql procedure "stored procedure" ( I like to have business logic outside of apex) which is invoked by pressing the button "export_to_csv". Of course the stored procedure can handle also parameters
An example code would be something like
PROCEDURE srn_brief_mitglieder (
     p_start_mg_nr IN NUMBER,
     p_ende_mg_nr IN NUMBER
AS
export_file          UTL_FILE.FILE_TYPE;
l_line               VARCHAR2(20000);
l_lfd               NUMBER;
l_dateiname          VARCHAR2(100);
l_datum               VARCHAR2(20);
l_hilfe               VARCHAR2(20);
CURSOR c1 IS
SELECT
MG_NR
,TO_CHAR(MG_BEITRITT,'dd.mm.yyyy') AS MG_BEITRITT ,TO_CHAR(MG_AUFNAHME,'dd.mm.yyyy') AS MG_AUFNAHME
,MG_ANREDE ,MG_TITEL ,MG_NACHNAME ,MG_VORNAME
,MG_STRASSE ,MG_HNR ,MG_ZUSATZ ,MG_PLZ ,MG_ORT
FROM MITGLIEDER
WHERE MG_NR >= p_start_mg_nr
AND MG_NR <= p_ende_mg_nr
--WHERE ROWNUM < 10
ORDER BY MG_NR;
BEGIN
SELECT TO_CHAR(SYSDATE, 'yyyy_mm_dd' ) INTO l_datum FROM DUAL;
SELECT TO_CHAR(SYSDATE, 'hh24miss' ) INTO l_hilfe FROM DUAL;
l_datum := l_datum||'_'||l_hilfe;
--DBMS_OUTPUT.PUT_LINE ( l_datum);
l_dateiname := 'SRNBRIEF_MITGLIEDER_'||l_datum||'.CSV';
--DBMS_OUTPUT.PUT_LINE ( l_dateiname);
export_file := UTL_FILE.FOPEN('EXPORTDIR', l_dateiname, 'W');
l_line := '';
--HEADER
l_line := '"NR"|"BEITRITT"|"AUFNAHME"|"ANREDE"|"TITEL"|"NACHNAME"|"VORNAME"';
l_line := l_line||'|"STRASSE"|"HNR"|"ZUSATZ"|"PLZ"|"ORT"';
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FOR rec IN c1
LOOP
     l_line := '"'||rec.MG_NR||'"';
     l_line := l_line||'|"'||rec.MG_BEITRITT||'"|"' ||rec.MG_AUFNAHME||'"';
     l_line := l_line||'|"'||rec.MG_ANREDE||'"|"'||rec.MG_TITEL||'"|"'||rec.MG_NACHNAME||'"|"'||rec.MG_VORNAME||'"';
     l_line := l_line||'|"'||rec.MG_STRASSE||'"|"'||rec.MG_HNR||'"|"'||rec.MG_ZUSATZ||'"|"'||rec.MG_PLZ||'"|"'||rec.MG_ORT||'"';
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-- in datei schreiben
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END LOOP;
UTL_FILE.FCLOSE(export_file);
END srn_brief_mitglieder;Edited by: wucis on Nov 6, 2011 9:09 AM

How to generate unique filenames??

i need to be able to generate unique files from a servlet..
my initial instinct was to use the seesion id as part of the filename, however as this file will be embedded in the responding html, this is not safe, as the user will only have to look at the html source to view a session id value.
i am now considering to use the date/time of the creation of a session as the unique identifier for the file, however this will not work if two sessions can be created at the same time.
my question thefore is if no two sessions can have the same date and time?
if not.. can anyone give me an idea as how to produce unique filenames?

If you are actually creating a file, why not usethe
java.io.File.createTempFile() method?how does that help with prducing a unique value to use
as the name of a file?
with that method i still need to supply the filename
as one of its arguments!
No you don't. You provide a prefix and suffix and it fills in the middle with something guaranteed to be unique, in the directory you specify. Here is the javadoc:
createTempFile
public static File createTempFile(String prefix,
String suffix,
File directory)
throws IOException
Creates a new empty file in the specified directory, using the given prefix and suffix strings to generate its name. If this method returns successfully then it is guaranteed that:
1. The file denoted by the returned abstract pathname did not exist before this method was invoked, and
2. Neither this method nor any of its variants will return the same abstract pathname again in the current invocation of the virtual machine.
This method provides only part of a temporary-file facility. To arrange for a file created by this method to be deleted automatically, use the deleteOnExit() method.
The prefix argument must be at least three characters long. It is recommended that the prefix be a short, meaningful string such as "hjb" or "mail". The suffix argument may be null, in which case the suffix ".tmp" will be used.
To create the new file, the prefix and the suffix may first be adjusted to fit the limitations of the underlying platform. If the prefix is too long then it will be truncated, but its first three characters will always be preserved. If the suffix is too long then it too will be truncated, but if it begins with a period character ('.') then the period and the first three characters following it will always be preserved. Once these adjustments have been made the name of the new file will be generated by concatenating the prefix, five or more internally-generated characters, and the suffix.
If the directory argument is null then the system-dependent default temporary-file directory will be used. The default temporary-file directory is specified by the system property java.io.tmpdir. On UNIX systems the default value of this property is typically "/tmp" or "/var/tmp"; on Microsoft Windows systems it is typically "c:\\temp". A different value may be given to this system property when the Java virtual machine is invoked, but programmatic changes to this property are not guaranteed to have any effect upon the the temporary directory used by this method.
Parameters:
prefix - The prefix string to be used in generating the file's name; must be at least three characters long
suffix - The suffix string to be used in generating the file's name; may be null, in which case the suffix ".tmp" will be used
directory - The directory in which the file is to be created, or null if the default temporary-file directory is to be used
Returns:
An abstract pathname denoting a newly-created empty file
Throws:
IllegalArgumentException - If the prefix argument contains fewer than three characters
IOException - If a file could not be created
SecurityException - If a security manager exists and its SecurityManager.checkWrite(java.lang.String) method does not allow a file to be created
Since:
1.2

How to generate unique numbers

hi all,
I want to generate unique numbers always starting from 1 using a single sql query and I dont want to use a sequence and i dont think rownum will be helpful for generating unique numbers in all cases . how to do this ?
thanks & regards,
kumar.

If two users get the MAX from temp, they would be updating with the same value for two different rows.If TEMP is a genuine temporary table, this is not an issue, because the data in a temporary table is only visible within a session.
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Another, more workable, solution is to use a code control table. This can be (should be) another temporary table, with one row holding one column - next value for TEMP.ID. Normally we would rule out such a solution because it serializes access to the inserted table, but as this is only on a per session basis, it doesn't matter.
CREATE OR REPLACE TRIGGER tmp_bir BEFORE INSERT ON temp1 FOR EACH ROW
DECLARE
ln NUMBER;
BEGIN
SELECT nvl(code1.next_id,1) INTO ln
FROM code1;
:NEW.id := ln;
UPDATE code1
SET next_id := ln+1;
END;Beware: coded freehand, so may need debugging.
Cheers, APC

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We need to add a new translation to the table commonXLAExtensionCache. However in the documentation it states:
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For this example, we are adding a new translation for a custom FlexSync report are using.

MSSQL DB
select '1058' + upper(newid());
Oracle DB
select ('1058' || newid) from dual;

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Hi All,
How can we generate a unique seq Id in BPEL.
One way is to use "*orcl:generate-guid()*" .
Are there any other ways by which we can generate the unique seq id. please send me some sample piece of code if any for example.
Regards
Narendra
Mail to: [email protected]

Probably not best practice, but I created a sequence in one of my Oracle DBs to call and get a unique ID. You could do something similar with a call to a SQL DB. If you don't care if it is a number or not you could use the Generate GUID function within BPEL.
--S

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Since this database is outside my control for edits/updates, I need to be able to initiate flushing of the cached queries for this database only. I don't believe the built-in ColdFusion ehcache query cache allows for granular control of flushing - in CF Administrator you pretty much can only flush the entire cache.
So I figured the only solution was to create my own cache region that would be associated with just this database, and manually cache the queries into that region. Then I can flush just that region without impacting any other cached queries.
So here's my difficulty: I believe that Internally, ColdFusion caches queries using a hash of the generated SQL. I'm thinking I'll store my queries in cache with a key that hashes the input parameters. Would the built-in Hash() function be the appropriate mechanism to create cache keys that are unique for each parameter combination? Does it matter what algorithm I use with Hash()?
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-Carl V.

Sorry, didn't see your original question! You might be better asking this on StackOverflow, as there's more people who have more experience with CF keeping an eye on the questions there.
What I can offer is that MD5 hashes are not guaranteed unique for different input strings. It's unlikely to happen, but it can happen. I think - but am not sure - more "thorough" hashing algorithms might be more likely to have a higher degree of uniqueness.
That said, the general approach is how these things are generally done. And it's very very unlikely that you'll ever come to use a combination of elements contributing to the key that will generate a hash that you've already used for something else.
Adam

How to generate unique IDs for a metadata field

Hi,
We have a requirement to generate a unique ID for a metadata field. Does anybody know how this can be achieved? Ideally I would want to have a database sequence and specify the metadata field to get value from this database sequence, similar to how Content ID is generated.
Any help is appreciated. Thank you in advance.
Regards,
Tim

Look into the Counters table. You should be able to create a component install filter to add in your field to the Counters table.
You could then create some Java code to fetch the next value from the Counters database for your field (and increment the value).
Jonathan
http://redstonecontentsolutions.com
http://corecontentonly.com

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1) Run a concurrent program in Oracle Apps 11
2) Output generated is XML (.xml)
Regards.

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PL/SQL XML Programming

How to generate unique values while initializing values

I am initializing values in my pl/sql program and want to use a sequence to set my unique ids but it errors out. Below is what I use.
ie. table_id := table_seq.nextval;
How can I use my sequence to initialize values or is this possible?

The method suggested by user605919 will work. However, you don't need to initialize a variable like this. It is better and more performant to do it like the third example below:
SQL> create table mytable
2 ( id number(6)
3 , description varchar2(30)
4 )
5 /
Tabel is aangemaakt.
SQL> create sequence table_seq start with 1 increment by 1
2 /
Reeks is aangemaakt.
SQL> declare
2    table_id mytable.id%type := table_seq.nextval;
3 begin
4    insert into mytable
5    ( id
6    , description
7    )
8    values
9    ( table_id
10    , 'Some description'
11    );
12 end;
13 /
table_id mytable.id%type := table_seq.nextval;
FOUT in regel 2:
.ORA-06550: line 2, column 41:
PLS-00357: Table,View Or Sequence reference 'TABLE_SEQ.NEXTVAL' not allowed in this context
ORA-06550: line 2, column 12:
PL/SQL: Item ignored
ORA-06550: line 9, column 5:
PLS-00320: the declaration of the type of this expression is incomplete or malformed
ORA-06550: line 9, column 5:
PL/SQL: ORA-00904: "TABLE_ID": invalid identifier
ORA-06550: line 4, column 3:
PL/SQL: SQL Statement ignored
SQL> declare
2    table_id mytable.id%type;
3 begin
4    select table_seq.nextval
5      into table_id
6      from dual
7    ;
8    insert into mytable
9    ( id
10    , description
11    )
12    values
13    ( table_id
14    , 'Some description'
15    );
16 end;
17 /
PL/SQL-procedure is geslaagd.
SQL> begin
2    insert into mytable
3    ( id
4    , description
5    )
6    values
7    ( table_seq.nextval
8    , 'Some description'
9    );
10 end;
11 /
PL/SQL-procedure is geslaagd.And if you need the id value for some code after the insert, you use the RETURNING clause.
Regards,
Rob.

How to generate unique random numbers

Hi All,
I am wondering whether there is already a random library or built-in function available in Java to produce some random numbers between certain ranges that are not repetitive. Let's look at a common examples as follows:
Random diceRoller = new Random();
for (int i = 0; i < 10; i++) {
int roll = diceRoller.nextInt(6) + 1;
System.out.println(roll);
}My understanding from this approach is that it allows the same number to be repeated over and over again. However, I would like to find out how to continue generating random numbers from remaining ones that haven't been generated earlier.
Using the above example to illustrate my intention:
1st random number generated - possibility of 1 - 6 showed up. Say 5 is picked.
2nd random number generated - possibility of 1, 2, 3, 4, 6 only. Say 2 is picked.
3rd random number generated - possibility of 1, 3, 4, 6 available. Say 1 is picked.
4th random number generated - possibility of 3, 4, 6 left. Say 6 is picked.
5th random number generated - possibility of 3, 4 remains. Say 4 is picked.
Any assistance would be much appreciated.
Many thanks,
Jack

htran_888 wrote:
Hi All,
I am wondering whether there is already a random library or built-in function available in Java to produce some random numbers between certain ranges that are not repetitive. Let's look at a common examples as follows:
Random diceRoller = new Random();
for (int i = 0; i < 10; i++) {
int roll = diceRoller.nextInt(6) + 1;
System.out.println(roll);
}My understanding from this approach is that it allows the same number to be repeated over and over again. However, I would like to find out how to continue generating random numbers from remaining ones that haven't been generated earlier.
Using the above example to illustrate my intention:
1st random number generated - possibility of 1 - 6 showed up. Say 5 is picked.
2nd random number generated - possibility of 1, 2, 3, 4, 6 only. Say 2 is picked.
3rd random number generated - possibility of 1, 3, 4, 6 available. Say 1 is picked.
4th random number generated - possibility of 3, 4, 6 left. Say 6 is picked.
5th random number generated - possibility of 3, 4 remains. Say 4 is picked.
Any assistance would be much appreciated.If it is your school assignment then you have the answer above (List & the lists length).
(You might want to look at Collections)

How to generate unique document number ?

Hi All,
We need to generate Document Number where there should be any gap, so that we cannot use sequence. For example : Invoice Number.
one possible approach like : Select MAX(InvoiceNumber)+1 from invoice, what if that table has millions of rows, is this reliable enough ?
How to avoid two user do the same query at same time that lead to dupplicate number ?
Anybody has done it this way in production? or any other approach ?
Thank you for your info,
xtanto

I strongly second Justin's strong suggestion about re-considering the requirement.
Be aware that for any of the schemes suggested to have a chance of working, all access to the table must be through stored procedures that use a SELECT FOR UPDATE on the counter table. No user in the database can have insert privileges on the document table except the owner. The owner's password should be kept in a locked safe and be unknown to anyone. If for some reason the owner needs access to the database, then remove the password from the safe, do what needs to be done, then get some guy off the street to set a new password, write it down and lock it in the safe again.
If you really need a gap-free number, it needsto be another column, separate from the PK. Use a sequence to generate the pk gaps and all, then create a procedure that runs periodically to update the gap free column. Soemthing like:
SQL> CREATE PROCEDURE fix_gap_free AS
2     l_v NUMBER;
3     TYPE id_tbl IS TABLE OF number INDEX BY BINARY_INTEGER;
4     l_ids id_tbl;
5     l_id2s id_tbl;
6 BEGIN
7     SELECT MAX(NVL(id2,0)) INTO l_v FROM t;
8     SELECT id, ROW_NUMBER() OVER (ORDER BY id)
9     BULK COLLECT INTO l_ids, l_id2s
10     FROM t
11     WHERE id2 IS NULL;
12
13     FORALL i IN 1 .. l_ids.COUNT
14        UPDATE t
15        SET id2 = l_id2s(i) + l_v
16        WHERE id = l_ids(i);
17     COMMIT;
18 END;
19 /
Procedure created.
SQL> SELECT * FROM t;
        ID        ID2
         1
         2
         5
         7So, id2 is going to be the gap-free column.
SQL> exec fix_gap_free;
PL/SQL procedure successfully completed.
SQL> SELECT * FROM t;
        ID        ID2
         1          1
         2          2
         5          3
         7          4So first pass is fine. Now lets add a few rows, so the table now looks like:
SQL> SELECT * FROM t;
        ID        ID2
         1          1
         2          2
         5          3
         7          4
         8
         9
        25and generate more gap free number:
SQL> exec fix_gap_free;
PL/SQL procedure successfully completed.
SQL> SELECT * FROM t;
        ID        ID2
         1          1
         2          2
         5          3
         7          4
         8          5
         9          6
        25          7If there may be deletions in the table, and you need to maintain the gap free nature, then just skip the WHERE id2 IS NULL predicate.
John

Sybase datetime col...how to generate as timestamp col in oracle ddl

i'm having trouble understanding the date mapping...
i'm taking the defaults (per http://dermotoneill.blogspot.com/2008/06/offline-data-move-dates.html)...
but my sybase datetime columns are being generated as date columns in the oracle ddl. (so i lose the milliseconds)
is there a way to tell the tool to generate datetime cols as timestamp in the oracle ddl?
thanks!

If you want to keep the milliseconds you have to make sure you don't map it to datatype date. You need to change the default mapping to TIMESTAMP:
Open SQLDev Migration Workbench
- click on the capture model
- right mouse click on the captured Sybase database
=> set data mapping
Make sure you change the deafult of DATETIME to TIMESTAMP(6).
Then recreate the Oracle model and you'll see the data type is now timestamp which includes the milliseconds.

How to Generate Unique Serial No in Oracle 6i report

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