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POneed help optimized sql query
 

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  1. POneed help optimized sql query
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    <p>I have a web site that tracks mutual fund investment. for this I have below table structure (structure has been modified to remove unwanted columns so as to bring focus on my problem)</p> <p><strong>Table #1: scheme_Mst</strong></p> <pre><code>|Scheme_ID | fundHouse_Id | OpeningBalance | OpeningUnits ---------------------------------------------------------- |1 | 1 | 100 | 10 </code></pre> <p><strong>Table #2 investment</strong></p> <pre><code>|Scheme_ID | InvestedAmt | InvestedUnits | statusFlag ---------------------------------------------------------- |1 | 50 | 5 | A </code></pre> <p><strong>Table #3 redemption</strong></p> <pre><code>|Scheme_ID | redemedAmt | redemedUnits | statusFlag ---------------------------------------------------------- |1 | 50 | 5 | A </code></pre> <p><strong>Table #4 SwitchDetails</strong></p> <pre><code>|From_Scheme_ID |To_Scheme_ID |switchInAmt |switchInUnits |switchOutAmt |switchOutUnits | StaFlag ------------------------------------------------------------------------------------------ |1 | 2 | 20 | 2 | 10 | 1 | A </code></pre> <p><strong>Table #5 BonusDetails</strong></p> <pre><code>|Scheme_ID | BonusAmt | BonusUnits | statusFlag ---------------------------------------------------------- |1 | 50 | 5 | A </code></pre> <p><strong>Table #6 Divident_Detais</strong></p> <pre><code>|Scheme_ID | DividentAmt | DividentUnits | statusFlag ---------------------------------------------------------- |1 | 50 | 5 | A </code></pre> <p>Now to have a details of the of available units in the scheme I have below query ....(Which is very very expensive )</p> <pre><code>SELECT *, CASE WHEN OutstandingUnits &lt;&gt; 0 THEN CONVERT(decimal(18,2),Outstanding/OutstandingUnits) ELSE 0 END AS WAC FROM (SELECT *, ISNULL(OpeningBalance,0) + ISNULL(DividendAmount,0) + ISNULL(bonusAmount,0) + ISNULL(invstAmount,0) + ISNULL(SwitchedInAmount,0) - ISNULL(redeemedAmount,0) - ISNULL(SwitchedOutAmount,0) AS Outstanding, ISNULL(openingUnits,0) + ISNULL(DividendUnits,0) + ISNULL(bonusUnits,0) + ISNULL(invstUnits,0) + SNULL(SwitchedInUnits,0) - ISNULL(redeemedUnits,0) - ISNULL(SwitchedOutUnits,0) AS OutstandingUnits FROM (SELECT C.scheme_ID,D.schemeName, D.Openingbalance AS OpeningBalance, D.OpeningUnits AS openingUnits, ISNULL(SUM(C.invstAmount),0) AS invstAmount, ISNULL(SUM(C.invstUnits),0) AS invstUnits, (SELECT ISNULL(SUM(redemedAmt),0) FROM redemption WHERE StatusFlag='A' AND scheme_ID = C.scheme_ID) AS redeemedAmount, (SELECT ISNULL(SUM(redeemedUnits),0) FROM redemption WHERE StatusFlag='A' AND scheme_ID = C.scheme_ID) AS redeemedUnits, (SELECT ISNULL(sum(switchOutAmt),0) FROM SwitchDetails WHERE BB.Status = 'A' AND BB.From_Scheme_Id = C.scheme_ID) AS SwitchedOutAmount, (SELECT ISNULL(sum(switchOutUnits),0) FROM SwitchDetails WHERE BB.Status = 'A' AND BB.From_Scheme_Id = C.scheme_ID) AS SwitchedOutUnits, (SELECT ISNULL(sum(switchOutAmt),0) FROM SwitchDetails WHERE BB.Status = 'A' AND BB.From_Scheme_Id = C.scheme_ID) AS SwitchedInAmount, (SELECT ISNULL(sum(SwitchedInUnits),0) FROM SwitchDetails WHERE BB.Status = 'A' AND BB.From_Scheme_Id = C.scheme_ID) AS SwitchedInUnits, .. same way FOR bonus AND divident .. FROM Investment c) tab)tab2 </code></pre> <p>This query is supposed to produce the below output.. (sample output)</p> <pre><code>Scheme_ID| Scheme_Name | OpeningBalance | OpeningUnits | InvstAmount | invstUnits | redemedAmount | redemedUnits | SwitchedOutAmt | SwitchOutUnit | bonusAmt | bonusUnit | DividentAmount | DividentUnit | Outstanding | OutstandingUnit | WAC ------------------------------------------------------------------------------------------- </code></pre> <p>This is how I am calculating the details. Please suggest me the better way of doing it.</p> <p>I am using sql server 2008 </p>
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    1. PTQuestion
    1. USYagnesh.Dixit
    1. USYagnesh.Dixit
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    1. This table or related slice is empty.
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    2. PO
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    1. This table or related slice is empty.
    1. COYou need use joins , not subqueries
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      1. POneed help optimized sql query
      1. USJustin
    2. COThe `where` on each of the subqueries from `SwitchedOutAmount` onwards have nothing to do with the `SwitchDetails` tables they reference - so the numbers are going to `sum` the entire table...
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      1. POneed help optimized sql query
      1. USdav1dsm1th
    3. COIf you have many parallel 1-N relations, then you probably have to use subqueries (grouping may duplicate rows) - but even then you can always aggregate many values in single (sub)query, like "select sum() as a1, sum() as as2, ... from ...".
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      1. POneed help optimized sql query
      1. USArvo
 

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