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Description
Calculates the median of the specified column for each element of the given parent table.
The median is the middle element of a group. If the group has an even number of elements, the upper value of the two middle values is taken as the median.
Like the regular MEDIAN operator, the column can either be an INT, FLOAT or DATE column. The data type of the result is the same as the input column data type.
If no value in the child table exists for the element in the parent table (either because all values of the child table column are filtered out, or because no corresponding value exists in the first place), NULL will be returned.
Syntax
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PU_MEDIAN ( parent_table, child_table.column [, filter_expression] ) |
Examples
Calculate the maximum of the case table values for each company code:
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Column1
Column2
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Calculate the median of the case table values for each company code. Only consider cases with an ID larger than 2:
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Column1
Column2
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Calculate the median of the case table values for each company code. Only consider cases with an ID larger than 3. All case table values for companyCode '001' are filtered out, which means that in this case, NULL is returned:
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Column1
Column2
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Example over three tables: For each entry in table B, calculate the median of the values that are larger than 100 in table C. Tables B and C do not have a direct connection, but are connected via table A:
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Column1
Column2
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DOMAIN_TABLE
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Column1
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"caseTable"."caseId" |
Column2
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PU_MEDIAN(DOMAIN_TABLE("caseTable"."companyCode"), "caseTable"."value") |
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caseTable
title | Output |
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