• Article

OpeningPeriod (MDX)

Returns the first sibling among the descendants of a specified level, optionally at a specified member.

Syntax

OpeningPeriod( [ Level_Expression [ , Member_Expression ] ] )

Arguments

  • Level_Expression
    A valid Multidimensional Expressions (MDX) expression that returns a level.

  • Member_Expression
    A valid Multidimensional Expressions (MDX) expression that returns a member.

Remarks

This function is primarily intended to be used the Time dimension, but can be used with any dimension.

  • If a level expression is specified, the OpeningPeriod function uses the hierarchy that contains the specified level and returns the first sibling among the descendants of the default member at the specified level.

  • If both a level expression and a member expression are specified, the OpeningPeriod function returns the first sibling among the descendants of specified member at the specified level within the hierarchy containing the specified level.

  • If neither a level expression nor a member expression are specified, the OpeningPeriod function uses the default level and member of the dimension with a type of Time.

The OpeningPeriod function is equivalent to the following MDX statement:

TopCount(Descendants(Member_Expression, Level_Expression), 1)

Note

The ClosingPeriod function is similar to the OpeningPeriod function, except that the ClosingPeriod function returns the last sibling instead of the first sibling.

Examples

The following example returns the value for the default measure for the FY2002 member of the Date dimension (which has a type of Time). This member is returned because the Fiscal Year level is the first descendant of the [All] level, the Fiscal hierarchy is the default hierarchy because it is the first user-defined hierarchy in the hierarchy collection, and the FY2002 member is the first sibling in this hierarchy at this level.

SELECT OpeningPeriod() ON 0
FROM [Adventure Works]

The following example returns the value for the default measure for July 1, 2001 member at the Date.Date.Date level for the Date.Date attribute hierarchy. This member is the first sibling of the descendant of [All] level in the Date.Date attribute hierarchy.

SELECT OpeningPeriod([Date].[Date].[Date]) ON 0
FROM [Adventure Works]

The following example returns the value for the default measure for January, 2003 member, which is the first sibling of the descendant of the 2003 member at the year level in the Calendar user-defined hierarchy.

SELECT OpeningPeriod([Date].[Calendar].[Month],[Date].[Calendar].[Calendar Year].&[2003]) ON 0
FROM [Adventure Works]

The following example returns the value for the default measure for July, 2002 member, which is the first sibling of the descendant of the 2003 member at the year level in the Fiscal user-defined hierarchy.

SELECT OpeningPeriod([Date].[Fiscal].[Month],[Date].[Fiscal].[Fiscal Year].&[2003]) ON 0
FROM [Adventure Works]