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POIndexes on table which has duplicate values in sql
 

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  1. POIndexes on table which has duplicate values in sql
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    <p>I have two tables </p> <ol> <li><p>Main table <code>PostInfo</code> columns like( <code>PostID</code>,<code>PostSubject</code>,<code>PostedDate</code>,<code>IsProcessed</code>).One entry for each Post ID</p></li> <li><p>Transaction Table <code>Post_Transaction</code></p> <pre><code> PostID PostComments Post_InsertedOn UserID -------------------------------------------------------------------- 10000 VRDFHFGFTR 2013-10-26 21:08:19.817 43434 10000 GFDGDFSDFF 2013-10-26 21:12:32.323 67576 10000 HGFHGFBNBF 2013-10-26 21:43:43.545 3232 10000 JNFNGHFGHG 2013-10-26 21:45:46.656 768 10000 MJHJNGJHGH 2013-10-26 21:56:32.767 9897 10001 XCVGFDGDFG 2013-10-26 22:54:54.868 3424 10001 YTUGFGHHGF 2013-10-26 13:32:54.132 12313 10001 HGFHFGHGHF 2013-10-26 18:08:32.878 6565 </code></pre></li> </ol> <p>We have <code>clustered unique index</code> on <code>PostID</code> column in <code>PostInfo</code> table.</p> <p><code>Clustered non unique index</code> on <code>PostID</code> column in <code>Post_Transaction</code> table. How far this <code>non unique clustered index(Post_Transaction)</code> would work efficiently as there will be 50000+ entries for each <code>PostID</code> in <code>Post_Transaction</code> table.</p> <p><code>Or</code></p> <p>do i need to create an identity column(<code>IdentID</code>) in <code>Post_Transaction</code> table.so that i can create <code>Clustered unique index</code> on that <code>IdentID</code> column,<code>Non clustered non unique index</code> on <code>PostID</code> in <code>Post_Transaction</code> table.</p> <p>Which way i need to proceed,Please suggest. :-)</p>
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    1. USRam Das
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    1. CODid you also declare the `FOREIGN KEY` relationship between the two tables?
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      1. USNickyvV
    2. COYes, declared relationship.
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      1. USRam Das
    3. COAdding an IDENTITY column on Post_Transaction will help you later. Choosing which index should be clustered is a decision based on queries running against this table.
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      1. POIndexes on table which has duplicate values in sql
      1. USMihai Bejenariu
 

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