ORACLE-TRIGGERS

RizwanSharief
30 pts.
Tags:
Oracle PL/SQL
Oracle SQL
Oracle triggers
SQL Trigger
Hello, im going to create a trigger(insert or update) for a tableA, when it fires inserted or updated columns are should be insert or update into another table say tableB, one column(Processed_time) in tableB where its value will be by subtrcting two columns in tableA(response_time,Submission_time) all are timestamp type how to update(Processed_time) in tableB by subtracting above two clmns in tableA --------------------------------------------------------------------------------

Software/Hardware used:
SOFTWARE-ORACLE 10G
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Working with Oracle TIMESTAMP data type is so much easier than Oracle’s DATE data type (which of course) included date & time.

TIMESTAMP is more granular (detailed). Oracle’s TIMESTAMP includes micro seconds (6 digits to the right of the decimal point) , exactly like DB2’s TIMESTAMP.

For TIMESTAMPs in Oracle simply substract one from the other.

SELECT ts1 , ts2 , ts2 – ts1
FROM …

The result of such an operation is NOT a TIMESTAMP. It is a DURATION in the format of
number of days followed by number of hours and minutes and seconds and microseconds.
A subtle distinction – but let me use an example of subtracting June 28 from June 30. The answer is 2 days. The answer is NOT January 2.

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