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RE: Problem with Outer Join

From: Mercadante, Thomas F <NDATFM_at_labor.state.ny.us>
Date: Thu, 22 Aug 2002 06:13:41 -0800
Message-ID: <F001.004BC864.20020822061341@fatcity.com>


Rick,

That's not how I read it.

He wants all dates returned showing whether an employee was present or not.

Tom Mercadante
Oracle Certified Professional

-----Original Message-----
Sent: Thursday, August 22, 2002 9:39 AM
To: Multiple recipients of list ORACLE-L

Tom,

I think by the post he wants to limit result set by employee_id for ex. employee_id=123

Rick  

                    "Mercadante,

                    Thomas F"              To:     Multiple recipients of
list ORACLE-L <ORACLE-L_at_fatcity.com>       
                    <NDATFM_at_labor.st       cc:

                    ate.ny.us>             Subject:     RE: Problem with
Outer Join                                  
                    Sent by:

                    root_at_fatcity.com

 

 

                    08/22/2002 08:58

                    AM

                    Please respond

                    to ORACLE-L

 

 





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

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Received on Thu Aug 22 2002 - 09:13:41 CDT

Original text of this message

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