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Trigger working with time & date

Posted on 2012-03-27
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Last Modified: 2012-06-27
How can Triggers working with Time & Date ?

Any example ?
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Question by:egovernment
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6 Comments
 
LVL 16

Expert Comment

by:Milleniumaire
ID: 37772310
Can you provide more information about what you are trying to do?  What do you mean by "working with Time & Date"?
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by:David
ID: 37772316
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 ....
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LVL 74

Expert Comment

by:sdstuber
ID: 37772320
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;
/
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Expert Comment

by:Wasim Akram Shaik
ID: 37773235
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Accepted Solution

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sdstuber earned 2000 total points
ID: 37774839
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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