Handling Single Quotes in Column Content

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dbms_xmlgen.convert( rtrim( extract( Xmlagg( xmlelement(e,Sq_Sql.Attr_Value) order by Sq_Sql.line_no
             ), '//text()').getclobval() , ','), 1) 

Sq_Sql.Attr_Value , Sq_Sql.line_no are column names