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                    <h1 id="find-dbadbduplicateindex">Find-DbaDbDuplicateIndex</h1>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td><strong>Author</strong></td>
<td>Claudio Silva (@ClaudioESSilva)</td>
</tr>
<tr>
<td><strong>Availability</strong></td>
<td>Windows, Linux, macOS</td>
</tr>
</tbody>
</table>
<p> </p>
<p>Want to see the source code for this command? Check out <a href="https://github.com/dataplat/dbatools/blob/master/public/Find-DbaDbDuplicateIndex.ps1">Find-DbaDbDuplicateIndex</a> on GitHub.
<br>
Want to see the Bill Of Health for this command? Check out <a href="https://dataplat.github.io/boh#Find-DbaDbDuplicateIndex">Find-DbaDbDuplicateIndex</a>.</p>
<h2 id="synopsis">Synopsis</h2>
<p>Find duplicate and overlapping indexes.</p>
<h2 id="description">Description</h2>
<p>This command will help you to find duplicate and overlapping indexes on a database or a list of databases.</p>
<p>On SQL Server 2008 and higher, the IsFiltered property will also be checked</p>
<p>Only supports CLUSTERED and NONCLUSTERED indexes.</p>
<p>Output:<br />
TableName<br />
IndexName<br />
KeyColumns<br />
IncludedColumns<br />
IndexSizeMB<br />
IndexType<br />
CompressionDescription (When 2008+)<br />
[RowCount]<br />
IsDisabled<br />
IsFiltered (When 2008+)</p>
<h2 id="syntax">Syntax</h2>
<pre><code>Find-DbaDbDuplicateIndex
    [-SqlInstance] &lt;DbaInstanceParameter[]&gt;
    [[-SqlCredential] &lt;PSCredential&gt;]
    [[-Database] &lt;Object[]&gt;]
    [-IncludeOverlapping]
    [-EnableException]
    [&lt;CommonParameters&gt;]

</code></pre>
<p> </p>
<h2 id="examples">Examples</h2>
<p> </p>
<h5 id="example-1">Example:  1</h5>
<pre><code>PS C:\&gt; Find-DbaDbDuplicateIndex -SqlInstance sql2005
</code></pre>
<p>Returns duplicate indexes found on sql2005<br></p>
<h5 id="example-2">Example:  2</h5>
<pre><code>PS C:\&gt; Find-DbaDbDuplicateIndex -SqlInstance sql2017 -SqlCredential sqladmin
</code></pre>
<p>Finds exact duplicate indexes on all user databases present on sql2017, using SQL authentication.<br></p>
<h5 id="example-3">Example:  3</h5>
<pre><code>PS C:\&gt; Find-DbaDbDuplicateIndex -SqlInstance sql2017 -Database db1, db2
</code></pre>
<p>Finds exact duplicate indexes on the db1 and db2 databases.<br></p>
<h5 id="example-4">Example:  4</h5>
<pre><code>PS C:\&gt; Find-DbaDbDuplicateIndex -SqlInstance sql2017 -IncludeOverlapping
</code></pre>
<p>Finds both duplicate and overlapping indexes on all user databases.<br></p>
<h3 id="required-parameters">Required Parameters</h3>
<h5 id="sqlinstance">-SqlInstance</h5>
<p>The target SQL Server instance or instances. <br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>True</td>
</tr>
<tr>
<td>Pipeline</td>
<td>true (ByValue)</td>
</tr>
<tr>
<td>Default Value</td>
<td></td>
</tr>
</tbody>
</table>
<h3 id="optional-parameters">Optional Parameters</h3>
<h5 id="sqlcredential">-SqlCredential</h5>
<p>Login to the target instance using alternative credentials. Accepts PowerShell credentials (Get-Credential).<br />
Windows Authentication, SQL Server Authentication, Active Directory - Password, and Active Directory - Integrated are all supported.<br />
For MFA support, please use Connect-DbaInstance.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td></td>
</tr>
</tbody>
</table>
<h5 id="database">-Database</h5>
<p>The database(s) to process. Options for this list are auto-populated from the server. If unspecified, all databases will be processed.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td></td>
</tr>
</tbody>
</table>
<h5 id="includeoverlapping">-IncludeOverlapping</h5>
<p>If this switch is enabled, indexes which are partially duplicated will be returned.<br />
Example: If the first key column is the same between two indexes, but one has included columns and the other not, this will be shown.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td>False</td>
</tr>
</tbody>
</table>
<h5 id="enableexception">-EnableException</h5>
<p>By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message.<br />
This avoids overwhelming you with &quot;sea of red&quot; exceptions, but is inconvenient because it basically disables advanced scripting.<br />
Using this switch turns this &quot;nice by default&quot; feature off and enables you to catch exceptions with your own try/catch.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td>False</td>
</tr>
</tbody>
</table>
<p> </p>

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