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copied!<pre><code>select t.Month, count(*) Members from ( select case when startdate <= to_date('01-Jan-2002', 'DD-MON-YYYY') AND enddate >= to_date('31-Jan-2002', 'DD-MON-YYYY') then ' Jan' when startdate <= to_date('01-Feb-2002', 'DD-MON-YYYY') AND enddate >= to_date('28-Feb-2002', 'DD-MON-YYYY') then ' Feb' when startdate <= to_date('01-Mar-2002', 'DD-MON-YYYY') AND enddate >= to_date('31-Mar-2002', 'DD-MON-YYYY') then ' Mar' when startdate <= to_date('01-Apr-2002', 'DD-MON-YYYY') AND enddate >= to_date('30-Apr-2002', 'DD-MON-YYYY') then ' Apr' when startdate <= to_date('01-May-2002', 'DD-MON-YYYY') AND enddate >= to_date('31-May-2002', 'DD-MON-YYYY') then ' May' when startdate <= to_date('01-Jun-2002', 'DD-MON-YYYY') AND enddate >= to_date('30-Jun-2002', 'DD-MON-YYYY') then ' Jun' when startdate <= to_date('01-Jul-2002', 'DD-MON-YYYY') AND enddate >= to_date('31-Jul-2002', 'DD-MON-YYYY') then ' Jul' when startdate <= to_date('01-Aug-2002', 'DD-MON-YYYY') AND enddate >= to_date('31-Aug-2002', 'DD-MON-YYYY') then ' Aug' when startdate <= to_date('01-Sep-2002', 'DD-MON-YYYY') AND enddate >= to_date('30-Sep-2002', 'DD-MON-YYYY') then ' Sep' when startdate <= to_date('01-Oct-2002', 'DD-MON-YYYY') AND enddate >= to_date('31-Oct-2002', 'DD-MON-YYYY') then ' Oct' when startdate <= to_date('01-Nov-2002', 'DD-MON-YYYY') AND enddate >= to_date('30-Nov-2002', 'DD-MON-YYYY') then ' Nov' when startdate <= to_date('01-Dec-2002', 'DD-MON-YYYY') AND enddate >= to_date('31-Dec-2002', 'DD-MON-YYYY') then ' Dec' end as Month from member) t group by t.Month </code></pre> <p>Where <code>member</code> is the table name.</p>

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