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    <p>First some date manipulation examples without converting everything to and back from strings.</p> <pre><code>SELECT SYSDATE - INTERVAL '1' YEAR -- returns the previous year from current date , TRUNC( SYSDATE, 'MM') -- returns the first day of the current month , ADD_MONTHS( TRUNC( SYSDATE, 'YYYY'), 11) -- returns December of current year , ADD_MONTHS( TRUNC( SYSDATE - INTERVAL '1' YEAR, 'YYYY'), 11) -- returns first day of december previous year , DECODE( TRUNC(SYSDATE, 'MM') , ADD_MONTHS(TRUNC(SYSDATE, 'YYYY'), 11), TRUNC( SYSDATE, 'MM' ) , ADD_MONTHS(TRUNC(SYSDATE, 'YYYY' ), 11) - INTERVAL '1' YEAR ) -- this implements your logic from dual </code></pre> <p>The last decode returns December 1st 2010 if the current month is NOT December 2011. If You run it on December 2011 it will return the 1st of December 2011.</p> <p>Now depending on how you want your date ranges you can use the following statements:</p> <p>If the date ranges are INCLUSIVE</p> <pre><code>SELECT e.* FROM EMPLOYEE e WHERE e.employee_timestamp BETWEEN DECODE( TRUNC(SYSDATE, 'MM') , ADD_MONTHS(TRUNC(SYSDATE, 'YYYY'), 11), TRUNC( SYSDATE, 'MM' ) , ADD_MONTHS(TRUNC(SYSDATE, 'YYYY' ), 11) - INTERVAL '1' YEAR ) AND SYSDATE </code></pre> <p>If the date ranges are exactly like you specified (EXCLUSIVE)</p> <pre><code> SELECT e.* FROM EMPLOYEE e WHERE e.employee_timestamp &gt; DECODE( TRUNC(SYSDATE, 'MM') , ADD_MONTHS(TRUNC(SYSDATE, 'YYYY'), 11), TRUNC( SYSDATE, 'MM' ) , ADD_MONTHS(TRUNC(SYSDATE, 'YYYY' ), 11) - INTERVAL '1' YEAR ) AND e.employee_timestamp &lt; SYSDATE </code></pre> <p>Hope this answers your question :) Remember to document this, code like this is hard to analyse years later.</p>
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    1. COThanks for your Answer. It really helped me alot.
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      1. USSai Srikanth
 

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