---
description: "IsSibling (MDX)"
title: "IsSibling (MDX) | Microsoft Docs"
ms.date: 02/17/2022
ms.prod: sql
ms.technology: analysis-services
ms.custom: mdx
ms.topic: reference
ms.author: owend
ms.reviewer: owend
author: minewiskan
---
# IsSibling (MDX)


  Returns whether a specified member is a sibling of another specified member.  
  
## Syntax  
  
```  
  
IsSibling(Member_Expression1, Member_Expression2)   
```  
  
## Arguments  
 *Member_Expression1*  
 A valid Multidimensional Expressions (MDX) expression that returns a member.  
  
 *Member_Expression2*  
 A valid Multidimensional Expressions (MDX) expression that returns a member.  
  
## Remarks  
 The **IsSibling** function returns **true** if the first specified member is a sibling of the second specified member. Otherwise, the function returns **false**.  
  
## Example  
 The following example returns TRUE if the current member on the Fiscal hierarchy of the Date dimension is a sibling of July 2002:  
  
 `WITH MEMBER MEASURES.ISSIBLINGDEMO AS`  
  
 `IsSibling([Date].[Fiscal].CURRENTMEMBER, [Date].[Fiscal].[Month].&[2002]&[7])`  
  
 `SELECT {MEASURES.ISSIBLINGDEMO} ON 0,`  
  
 `[Date].[Fiscal].MEMBERS ON 1`  
  
 `FROM [Adventure Works]`  
  
## See Also  
 [MDX Function Reference (MDX)](../mdx/mdx-function-reference-mdx.md)