RE: How to calculate time using SQL

From: Jack C. Applewhite <japplewhite_at_inetprofit.com>
Date: Mon, 01 Apr 2002 10:10:45 -0800
Message-ID: <F001.00438070.20020401101045@fatcity.com>

David,

SysDate is a function and can be referenced in any SQL statement. So you could do the following if you want seconds between the two, or leave off some or all of the trailing multiplicands to get fractional minutes, hours or days.

Select ( SysDate - Next_Date ) * 24 * 60 * 60
>From User_Refresh

;

You need to do a little reading in the Oracle SQL Reference under Datatypes to find out details of the Date datatype and Date arithmetic.

Jack

---

Jack C. Applewhite
Database Administrator/Developer
OCP Oracle8 DBA
iNetProfit, Inc.
Austin, Texas
www.iNetProfit.com
japplewhite_at_inetprofit.com
(512)327-9068

-----Original Message-----
David M
Sent: Monday, April 01, 2002 11:42 AM
To: Multiple recipients of list ORACLE-L

Jack,

How about substracting a system date with a database replication date to get difference of time? Can you please give me a specific command?

SQL> select to_char(sysdate, 'Dy Mon Dd HH24:MI:SS YYYY') from dual;

TO_CHAR(SYSDATE,'DYMONDD

---

Mon Apr 01 11:08:00 2002    ==================> System Time.

SQL> select next_date from user_refresh;

NEXT_DATE

---

Mon Apr 01 11:11:01 2002 ==============> Replication time.

Thanks,
David

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Author: Jack C. Applewhite
  INET: japplewhite_at_inetprofit.com

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Received on Mon Apr 01 2002 - 12:10:45 CST