How to set a sequence generator as a value

When i am creating a new object in a table there is a unique id i want to keep to identify this object and I use sequence generator. I believe the command is DB_SEQ_PK.NEXTVAL, do i put this statement as a "SQL EXP" in the Source value for the specific variable i want to set it to? Please give me the right expression if i am wrong thank you.

Raj,
i tested it with the emp table the following way:
Extend This Application
A page or application component
Component > Form > Table
[selected EMP table, page 40, the rest default]
Edit Page 40
Edit Page Item P40_EMPNO
Alternate source used: Only when current value is session state is null
Source Type: SQL Query
Source value or expression: SELECT CT_ID_SEQ.NEXTVAL FROM DUAL;
Apply Changes
Run Page
[The empno field shows a value of 50]
[I enter 'test' into the ename field and click 'Create']
[I receive the error: ORA-01400: cannot insert NULL into ("EAS"."EMP"."EMPNO")]
I'm not sure what i am doing wrong here.
Thanks

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How to set current year,month as default value in combo box

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02-04-09 | 02-04-09 | a | $4,154
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Edited by: Leong Pui Kee on Feb 25, 2011 5:25 AM
Edited by: Leong Pui Kee on Feb 25, 2011 5:36 AM

hi,
your created data
step 1
I create excel data like this
year___ | month_ | Product | revenue
02-04-09 | 02-04-09 | a | $4,154
03-04-09 | 03-04-09 | b | $6,813
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07-04-10 | 07-04-10 | b | $9,875
08-06-10 | 08-06-10 | a | $9,875
22-06-10 | 22-06-10 | b | $6,813
In this, year and month both are same data, make the diffent data like year 2009, 2010 And month Jan, Feb, March, ...Etc
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OR
from above, to create a date column and convert date-->year, date--> month and Explore it.
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Need some pointers about how to achieve following:
I am building a cache for TRADES and have a CacheStore supporting LOAD/STORE/REMOVE methods.
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Jonathan.Knight wrote:
<li>The AQ messaging is asynchronous so there will be a time-lag between the original put of the trade and it being updated with the version from the DB.
<li>How does the AQ listener know what the key is of the temporary trade is that it needs to remove, presumably you write this to the DB then send it back in the AQ message?Agreed. From my CacheStore, I call Stored Procedure inside Database Package. I can pass this TEMP key to this SP as 1 extra parameter. So, I do not necessarily need to store it in the database, but just use merely as an extra parameter to be sent back to AQ. Also, when the client puts a new trade, the business logic for most of the trade processing is in our stored procedures. There, it will enrich that trade with additional information from other tables, it will also adjust the trader position and then will return with the new trade key to the client. GUI/Client Applications will provide the data required to create a trade. But SP will use this data and using other local stored procedures, it will obtain extra information for the trade, enrich all the information in a single trade record and then will create that new record.
<li>If the code the listens to the AQ messages removes the original version of the trade from the cache before putting the new version into the cache you will have a short period of time where there is that trade does not exist in the cache
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user452051 wrote:
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Edited by: 981615 on Jan 14, 2013 12:48 AM

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