You can using for XSLT. More than one rows bind to single column.
example XSL
<xsl:element name="DataGridColumnName">
<xsl:for-each select="DataGridColumnName">
<xsl:value-of select="RowName"/><xsl:value-of select="SeatNo"/>
<xsl:if test="position() != last()">
<xsl:text>, </xsl:text>
</xsl:if>
</xsl:for-each>
</xsl:element>