Add unicode character to Cognos Analytics expression data - unicode

Question

I've got a simple expression like this: ReportDate()
which will print out the timestamp when the report was executed.
I want to add an unicode character like the SUM SIGN (https://www.fileformat.info/info/unicode/char/2211/index.htm) to that data in that expression. It is not a text field, it needs to be a concatination to a data expression.
Any idea? A simple || ... (any HTML or text) doesn't work.
Version Cognos Analytics 11
Database is DB2 LUW
Edit: The expression looks like this:
case when
[Datasource].[D_FINRP_D_KONTRAHENT_K].[SL_KONTRAHENTENGRUPPE] like 'D%' then concat('D (Summe)';' ∑')
else [Datasource].[D_FINRP_D_KONTRAHENT_K].[SL_KONTRAHENTENGRUPPE]
end
The HTML in the Cognos report looks like this: D (Summe)
and then the SUM sign doesn't show up.

Answer 1

Provided you using a Report Expression aka a Layout calculation from the Insertable objects pane, you should be able to use the following expression:
timestamp2string (ReportDate ())+ '∑'

Answer 2

Rather than a Query calculation, try an HTML item using a Data item value. Your expression should look like:
[Sales (query)].[Branch].[City] + 'Σ'
Here's an example using the sample data.
<report xmlns="http://developer.cognos.com/schemas/report/14.3/" useStyleVersion="11.4" expressionLocale="en-us">
<drillBehavior/>
<layouts>
<layout>
<reportPages>
<page name="Page1">
<style>
<defaultStyles>
<defaultStyle refStyle="pg"/>
</defaultStyles>
</style>
<pageBody>
<style>
<defaultStyles>
<defaultStyle refStyle="pb"/>
</defaultStyles>
</style>
<contents>
<list horizontalPagination="true" name="List1" refQuery="Query1">
<noDataHandler>
<contents>
<block>
<contents>
<textItem>
<dataSource>
<staticValue>No Data Available</staticValue>
</dataSource>
<style>
<CSS value="padding:10px 18px;"/>
</style>
</textItem>
</contents>
</block>
</contents>
</noDataHandler>
<style>
<CSS value="border-collapse:collapse"/>
<defaultStyles>
<defaultStyle refStyle="ls"/>
</defaultStyles>
</style>
<listColumns>
<listColumn>
<listColumnTitle>
<style>
<defaultStyles>
<defaultStyle refStyle="lt"/>
</defaultStyles>
</style>
<contents>
<textItem>
<dataSource>
<staticValue>HTML item</staticValue>
</dataSource>
</textItem>
</contents>
</listColumnTitle>
<listColumnBody>
<style>
<defaultStyles>
<defaultStyle refStyle="lc"/>
</defaultStyles>
</style>
<contents>
<HTMLItem>
<dataSource>
<dataItemValue refDataItem="City"/>
</dataSource>
</HTMLItem>
</contents>
</listColumnBody>
</listColumn>
</listColumns>
</list>
</contents>
</pageBody>
</page>
</reportPages>
</layout>
</layouts>
<XMLAttributes>
<XMLAttribute output="no" name="RS_CreateExtendedDataItems" value="true"/>
<XMLAttribute output="no" name="RS_modelModificationTime" value="2015-11-25T21:38:24.820Z"/>
<XMLAttribute output="no" name="listSeparator" value=","/>
</XMLAttributes>
<modelPath>/content/folder[#name=&apos;Samples&apos;]/folder[#name=&apos;Models&apos;]/package[#name=&apos;GO sales (query)&apos;]/model[#name=&apos;model&apos;]</modelPath>
<queries>
<query name="Query1">
<source>
<model/>
</source>
<selection>
<dataItem aggregate="none" rollupAggregate="none" name="City">
<expression>[Sales (query)].[Branch].[City] + &apos;&Sigma;&apos;</expression>
<XMLAttributes>
<XMLAttribute output="no" name="RS_dataType" value="3"/>
<XMLAttribute output="no" name="RS_dataUsage" value="0"/>
</XMLAttributes>
</dataItem>
</selection>
</query>
</queries>
</report>