filling of datetime column SQL Server with the data in the date column oracle

After a lot of "finangling", I think I have my link dg4msql works well between Oracle and MSSQL.

Now, what I'm trying to do, is fill a table in MSSQL with an Oracle table column values, whenever a new row is inserted in the Oracle table. I use a very simple trigger on the oracle table that goes basically like this:

mware is dblink to MSSQL database, oracle col worth DATE and mssql col is of type DATETIME

This is the relaxation: (edited to show only the column in question)
==================================================================================
CREATE or replace TRIGGER < oracleowner >. INSERT_INTO_NVDB
AFTER INSERT ON < oracleowner >. < oracletable > for each row
BEGIN
insert into '< mssqlowner > '. «< mssqltable > @mware «»
(
"load_date_time,"
)
VALUES)
: new.loading_date,.
);

END;
==================================================================================

Now, when you enter a record in the Oracle trigger triggers ok table but does not insert a date in the MSSQL table, the 'load_date_time' in the mssql table can have NULL values so I guess there just inserts a null value.

When I activate the triggers on the table MSSQL, which then takes these values and inserts them into another table with values from other tables, inserting in the Oracle table fails because the relaxation on the MSSQL database tries to pass the date (which is empty) table MSSQL in another table where the datetime field is not null.

I guess it's because Oracle date format is not compatible with MSSQL, which I think is "yyyy-mm-dd hh: mm:"- so I have to either convert the date format by default Oracle to match a MSSQL, or convert a char of the trigger value. (The developer of the side MSSQL says if I can convert it to a char value that should be ok too)

I think that it is probably better to leave it in the date format, the best way to do this would be to put an "alter session set nls_date_format ="at the beginning of the trigger?

Can I convert the date to char the trigger easily? If there is a better way to proceed in the way I approach it I'm all for it.

Thank you!

Hello
Your best option is to explicitly convert dates Oracle in a format recognized by SQL * Server. It's more coding, but then you know exactly what is being inserted and you give more control, if anything changes. You can also code to handle null data.
I'm not sure than to try to change the format of date to 'alter session... ". "do what you want.
You can use "to_char" on a date into character data-

To_char (, "HH24:MI:SSxFF of MON-DD-YYYY")

and use any mask format supported.
You also use 'to_date' to transform the character data in a date format, as well as 'to_char' and 'to_date' in combination.
For example -.

SELECT TO_CHAR (TO_DATE (October 27, 98 ',' DD-MON-RR'), 'YYYY') 'Year' FROM DUAL;

This is all discussed in the documentation-

Oracle® database
SQL language reference
11g Release 2 (11.2)

where it also describes the different format masks.
If you need further assistance on the use of to_date, to_char formats then ask in the forum SQL/PLSQL.

SQL and PL/SQL

where they have more experience.

Kind regards
Mike

Tags: Database

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