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  1. PO
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    <p>You might try this version (I'm assuming the <code>E</code> references are supposed to be the <code>ES</code> alias, otherwise the statement shouldn't run). Among other things, you should ditch the 'implicit join' (comma-separated <code>FROM</code> clause), especially if you ever start dealing with <code>LEFT JOIN</code>s.</p> <pre><code>WITH Maximum_Salary (max) as (SELECT MAX(EMP.SALARY) FROM EMPLOYEE EMP JOIN FINANCIAL_YEAR FY ON (FY.CURRENT_DT - 2 DAYS) &gt;= EMP.DATE_TS AND (FY.CURRENT_DT - 1 DAYS) &lt; EMP.DATE_TS WHERE EMP.JOIN_DT = DATE('2013-01-01') SELECT EMP.STATUS, COUNT(*) AS EMP_COUNT, GRP.GROUP_NAME FROM EMPLOYEE EMP JOIN GROUP_TABLE GRP ON GRP.RANGE_SALARY = 'BAND-10' JOIN EMPLOYEE_SALARY ES ON ES.EMPID = EMP.SALARY AND ES.SALARY_GRP = GRP.BAND_GROUP JOIN Maximum_Salary ON Maximum_Salary &lt;= EMP.SALARY GROUP BY EMP.STATUS, GRP.GROUP_NAME </code></pre> <p>If you aren't used to them already, the <code>WITH</code> syntax is a Common Table Expression (or CTE) - effectively, it's an inline view. These <em>can</em> result in temp-tables being created, in some instances, but otherwise can save you a lot of typing (they're also how recursive queries are performed). I've managed to get the references to <code>EMP.DATE_TS</code> into a form that can use an index (no help for the date-math on <code>FY.CURRENT_DT</code>, although as a small table that shouldn't matter much).</p> <p>Note that you may still need to perform additional tuning, especially depending on what indices you may (not) have.</p>
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    1. PODB2 Inner Query slow but fast with hardcoded values
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    1. USClockwork-Muse
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    1. COYay for you on "ditch the implict joins"!!!!
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