Select records for the last 24 hours

I need some help on writing SQL to get data for last 24 hours. For example
SELECT TO_char(date_field) FROM TEST_TABLE Where ??

What should I use in WHERE clouse to get desire result.

Thanks to anybody who would be able to help me.

I think this is what you are looking for.

SELECT TO_char(date_field) FROM TEST_TABLE Where
TO_char(date_field) > SYSDATE - 1;

subtractict 1 from SYSDATE subtracts 1 day. you could also subtract 1/24 which subtracts 1 hour, 2/24 subtracts 2 hours etc. :cool:

The following SQL gives you exactly 24 hours from the time the
trx is entered...

SELECT TO_CHAR(sysdate-1440/1440,'DD-MON-YY HH:MI:SS pm') FROM DUAL

Gregg

Thank you! It works.

For the record, there is no difference between the two statements.

Code:

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SQL> SELECT TO_CHAR(sysdate-1440/1440,'DD-MON-YY HH:MI:SS pm') FROM DUAL;

TO_CHAR(SYSDATE-1440/
---------------------
19-JUN-03 03:45:54 pm

SQL> SELECT TO_CHAR(sysdate-1,'DD-MON-YY HH:MI:SS pm') FROM DUAL;

TO_CHAR(SYSDATE-1,'DD
---------------------
19-JUN-03 03:45:54 pm

So where TO_char(date_field) > SYSDATE - 1; is the same as
  where TO_char(date_field) > SYSDATE - 1440/1440;

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Quote:

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Originally posted by gandolf989
SELECT TO_char(date_field) FROM TEST_TABLE Where
TO_char(date_field) > SYSDATE - 1;

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Look, left and right expression in where predicate are of different datatypes here.
I wonder what will happen? If right expression implicitly converts to char, then this is wrong.

Bottom line: get rid of this to_char in where clause.

Quote:

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Originally posted by gbrabham
The following SQL gives you exactly 24 hours from the time the
trx is entered...

SELECT TO_CHAR(sysdate-1440/1440,'DD-MON-YY HH:MI:SS pm') FROM DUAL

Gregg

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Isn't it same as SYSDATE-1 ??

i got following error in SQL 2000
'TO_CHAR' is not a recognized function name.
also the sysdate function is not working in SQL 2000

so how can i get records entered in last 24 hours???

This was an Oracle thread ... you are correct ... those functions are not valid in SQL Server ...

however: .... how about try getdate()-1