By comparing the date to sysdate

I'm trying to compare a date from a database of Oracle (10 g R1) sysdate but does not work.

DECLARE
   v_exit_date DATE;   --Let's assume exit_date from the database is today's date '15-APR-10'
BEGIN
    SELECT 
      exit_date 
    INTO
      v_exit_date
    FROM TABLE_1 WHERE student_id = 3020;
      
   IF v_exit_date = sysdate  THEN
       dbms_output.putline ('Dates are equal');
   ELSE
       dbms_output.putline ('Dates are not equal');
   END;
END;
An equality (=) expression is not evaluated. I always 'The Dates are not equal' when waiting for "the Dates are equal." What is the problem with my PL/SQL?

Thank you

Published by: Northstar on April 15, 2010 11:32

I ran this example below and it does not work on my db:

Connected to Oracle Database 11g Enterprise Edition Release 11.1.0.6.0
Connected as fsitja

SQL>
SQL> set serveroutput on
SQL> create table table_1 as select sysdate exit_date, 3020 student_id from dual;

Table created
SQL> DECLARE
  2     v_exit_date DATE;   --Let's assume exit_date from the database is today's date '15-APR-10'
  3  BEGIN
  4      SELECT exit_date
  5        INTO v_exit_date
  6        FROM TABLE_1 WHERE student_id = 3020;
  7     IF TRUNC(v_exit_date) = TRUNC(SYSDATE)
  8       THEN dbms_output.put_line ('Dates are equal');
  9       ELSE dbms_output.put_line ('Dates are not equal');
 10     END IF;
 11  END;
 12  /

Dates are equal

PL/SQL procedure successfully completed

SQL> 

Tags: Database

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