# Overlaps

{% hint style="info" %}
The `Overlaps` keyword checks 2 sets of concepts to see if *at least one concept* is available in both sets. 

This function is NOT SQL compatible. For more information about SQL compatibility, see our [documentation](/platform/wemreference/sql-compatibility.md).
{% endhint %}

{% hint style="success" %}
Returns a <mark style="color:green;">Yes/No</mark> value that indicates if at least one concept is part of both sets in the comparison.
{% endhint %}

<details>

<summary><mark style="color:blue;"><code>concept_set_a</code></mark><code> Overlaps </code><mark style="color:blue;"><code>concept_set_b</code></mark></summary>

`{ 'Orange', 'Blue' } Overlaps { 'Blue, 'Red', 'Orange' }`\
\&#xNAN;*=> Yes*

`{ 'Orange', 'Yellow' } Overlaps { 'Blue, 'Red' }`\
\&#xNAN;*=> No*

</details>


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