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    <p>You have to repeat the whole case-statement in the group. You can't use the alias for that.</p> <p>If you are using SQL Server you can create a temporary named resultset using the <a href="http://msdn.microsoft.com/en-us/library/ms175972.aspx" rel="nofollow">WITH</a> clause and group by that.</p> <p>If not, you could alternatively create a View without the grouping and group that view by the relevant column.</p> <p>Version 1 (copy &amp; paste the computed column):</p> <pre><code>select hr_id, max(delivery_dt)as maxd, (CASE WHEN max(delivery_dt) &gt; '11-may-2010' then '&lt; 6 MO' WHEN max(delivery_dt) &gt; '11-may-2004' and max(delivery_dt) &lt; '11-may-2010' then '7 - 78 MO' WHEN max(delivery_dt) &gt; '11-nov-1999' and max(delivery_dt) &lt; '11-april-2004' then '79 - 132 MO' ELSE '&gt; 133 MO' END) D from INDIVIDUAL_VE_TB where hr_id in (select distinct hr_id from MODEL_SC_TB b where b.model_id='200') group by hr_id, (CASE WHEN max(delivery_dt) &gt; '11-may-2010' then '&lt; 6 MO' WHEN max(delivery_dt) &gt; '11-may-2004' and max(delivery_dt) &lt; '11-may-2010' then '7 - 78 MO' WHEN max(delivery_dt) &gt; '11-nov-1999' and max(delivery_dt) &lt; '11-april-2004' then '79 - 132 MO' ELSE '&gt; 133 MO' END) </code></pre> <p>Version 2 (WITH clause):</p> <pre><code>with temporary(hr_id, maxd, D) { select hr_id, max(delivery_dt)as maxd, (CASE WHEN max(delivery_dt) &gt; '11-may-2010' then '&lt; 6 MO' WHEN max(delivery_dt) &gt; '11-may-2004' and max(delivery_dt) &lt; '11-may-2010' then '7 - 78 MO' WHEN max(delivery_dt) &gt; '11-nov-1999' and max(delivery_dt) &lt; '11-april-2004' then '79 - 132 MO' ELSE '&gt; 133 MO' END) D from INDIVIDUAL_VE_TB where hr_id in (select distinct hr_id from MODEL_SC_TB b where b.model_id='200') group by hr_id } select hr_id, MAX(maxd) maxd, D from temporary group by hr_id, D </code></pre> <p>Version 3 is just version 2 in two parts.</p>
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    1. POSQL - CASE statement with Group By function
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    1. COI tried doing that but it didnt work
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      1. USAkram Issa
    2. CONow it says group function is not allowed here. I am using PL/SQL by the way THX!!!
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