Trigger working with time & date

How can Triggers working with Time & Date ?

Any example ?
egovernmentAsked:
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MilleniumaireCommented:
Can you provide more information about what you are trying to do?  What do you mean by "working with Time & Date"?
DavidSenior Oracle Database AdministratorCommented:
Would you rephrase your question, or provide a specific example?  Triggers can be used with data manipulation statements (DML), so the standard datatype syntax applies with the TO_DATE function, for example.  If you need a column value to change, say, to the current SYSDATE, I would use something like UPDATE tab1 SET col1 = SYSDATE WHERE ....
sdstuberCommented:
here's a simple example of a trigger that captures the current system time on insert and assigns it to one of the columns in my table

is this what you were looking for?

CREATE OR REPLACE TRIGGER my_trigger
BEFORE INSERT ON my_table
FOR EACH ROW
BEGIN
   :new.my_date_column := SYSDATE;
END;
/
Wasim Akram ShaikCommented:
sdstuberCommented:
the trigger itself can't be time based.

however, you can put time controls within the trigger so that if it fires outside the appropriate time window it doesn't do anything.


CREATE OR REPLACE TRIGGER my_trigger
BEFORE INSERT ON my_table
FOR EACH ROW
BEGIN
   if sysdate > trunc(sysdate)+16/24 then
          dbms_output.put_line('It is after 4pm');  -- put other code here
   elsif sysdate > to_date('2012-04-01','yyyy-mm-dd') then
          dbms_output.put_line('It is after April 1, 2012'); -- put other code here
   else
          null; -- do nothing
   end if;
END;
/

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