Oracle-L: RE: Problem with Outer Join

From: Mercadante, Thomas F <NDATFM_at_labor.state.ny.us>
Date: Thu, 22 Aug 2002 04:58:39 -0800
Message-ID: <F001.004BC5D5.20020822045839@fatcity.com>

Aleem,

Your query should be:

SELECT year_date, to_char(attend_date, 'hh:mi:ss' )

     FROM A, B
     WHERE to_char(year_date, 'dd-mm-yyyy') 
             = to_char(attend_date,'dd-mm-yyyy') (+)

The above says to return all records from the year_date table and , oh, by the way, return any records in the employee table where dates match.

A better way to do this would be:

WHERE trunc(year_date) = trunc(attend_date) (+)

The Trunc command simply strips all time from date columns.

Hope this helps

Tom Mercadante
Oracle Certified Professional

-----Original Message-----
Sent: Thursday, August 22, 2002 8:38 AM
To: Multiple recipients of list ORACLE-L

Hi,

In our employee's attendance application the attendance data is stored in table 'A' including employee ID and attendance date & time. Another table 'B' has one column with dates of current year (365 records). For the sake of simplicity, other fields are ignored.

Table: A

Employee_ID
Attend_date (date with time)

Table: B

year_date (one record each for a day of current year i.e., 365 records)

In a report (single employee at a time) showing all dates of the year and in front of it whether the employee was present or not we are running the following query. Assume that table A has 15 records of employee ID 123, the query should return 365 records with 15 records telling the time but it returns 15 records only.

SELECT year_date, to_char(attend_date, 'hh:mi:ss' )

     FROM A, B
     WHERE to_char(year_date, 'dd-mm-yyyy') = to_char(attend_date(+),

'dd-mm-yyyy') and employee_id = 123;

To my understanding this is perhaps because of the filter employee_ID=123. What would be the query to get the required result?

TIA! Aleem
--

Please see the official ORACLE-L FAQ: http://www.orafaq.com
--

Author: Abdul Aleem
INET: dmit_at_beaconhouse.edu.pk

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
--------------------------------------------------------------------

To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
--

Please see the official ORACLE-L FAQ: http://www.orafaq.com
--

Author: Mercadante, Thomas F
INET: NDATFM_at_labor.state.ny.us

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
--------------------------------------------------------------------