# Can I use Custom Filters in Tableau to set up Incremental Refresh?

**URL:** <https://community.cdata.com/t/can-i-use-custom-filters-in-tableau-to-set-up-incremental-refresh/872>\
**Category:** CData Drivers\
**Tags:** custom-filters, question, driver, connect-cloud, tableau, cdata-connect-cloud, incremental-refresh\
**Created:** [July 24, 2024, 2:34pm UTC](https://community.cdata.com/t/can-i-use-custom-filters-in-tableau-to-set-up-incremental-refresh/872 "2024-07-24T14:34:03Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![James\_T](https://sea3.discourse-cdn.com/cdata/user_avatar/community.cdata.com/james_t/32/1871_2.png) [@James\_T](https://community.cdata.com/u/James_T)\
**Post date:** [July 24, 2024, 2:34pm UTC](https://community.cdata.com/t/can-i-use-custom-filters-in-tableau-to-set-up-incremental-refresh/872/1 "2024-07-24T14:34:04Z")

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I have a lot of data in my data source that I am trying to use with Tableau. When using CData connectors, is there a way I can help improve&nbsp;performance by only pulling in changed data?

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<div class="post-metadata">

**Author:** ![James\_T](https://sea3.discourse-cdn.com/cdata/user_avatar/community.cdata.com/james_t/32/1871_2.png) [@James\_T](https://community.cdata.com/u/James_T)\
**Post date:** [July 24, 2024, 2:51pm UTC](https://community.cdata.com/t/can-i-use-custom-filters-in-tableau-to-set-up-incremental-refresh/872/2 "2024-07-24T14:51:00Z")

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### Supported Data Sources

Tableau’s custom filters can be used to request&nbsp;only changed data --&nbsp;if&nbsp;the&nbsp;data source&nbsp;uses timestamps to indicate when data in a table has changed. A few examples are NetSuite, Salesforce and Sage Intacct.

### &nbsp;

### Using a Custom Filter in Tableau

1. Once a connection is established and a table has been selected, click on the carat and select “Convert to Custom SQL”

2. Click “Insert Parameter” and then “Create a New Parameter”  

3. Enter a name for your parameter, select the data type and provide the desired value. As this parameter can be changed later, it might be advisable to test the implementation with a shorter duration (i.e. the last several months of data).  

4. Add the custom SQL filter using the desired datetime column and the custom parameter.&nbsp;  

5. In the worksheet view, you can choose to select to show the custom parameter and update the value used in the SQL query.