diff --git a/process/Contact_lib/process.js b/process/Contact_lib/process.js
index 7bbafdc693adac2eb70bf75da3d35f24790c6560..4a59839543915bbe0c16edfb2c56985efe935f15 100644
--- a/process/Contact_lib/process.js
+++ b/process/Contact_lib/process.js
@@ -528,10 +528,8 @@ ContactUtils.hasCommRestriction = function(pContactId, pMedium, pStartDate)
  */
 ContactUtils.getActiveCommRestrictionsSubselect = function()
 {
-    var mediumList = KeywordUtils.getEntryNamesAndIdsByContainer($KeywordRegistry.communicationMediumCampaign());
-    var sqlMasking = new SqlMaskingUtils();
-
-    var parts = [];
+    var mediumList = KeywordUtils.getResolvedTitleSqlPart($KeywordRegistry.communicationMediumCampaign(), "COMMRESTRICTION.MEDIUM");
+    var mask = new SqlMaskingUtils()
 
     var orgContactSubselect = newSelect("orgContact.CONTACTID")
                                     .from("CONTACT anyContact")
@@ -539,20 +537,19 @@ ContactUtils.getActiveCommRestrictionsSubselect = function()
                                                                     .and("orgContact.PERSON_ID IS NULL"))
                                     .where("anyContact.CONTACTID = CONTACT.CONTACTID")
 
-    mediumList.forEach(function(pMedium) 
+    var group = mask.getGroupConcat("DISTINCT "+mediumList, "', '");
+    var subselect = "''";
+    if(group)
     {
-        var subquery = newSelect("COMMRESTRICTION.MEDIUM, COMMRESTRICTIONID")
-                            .from("COMMRESTRICTION")
-                            .where("COMMRESTRICTION.MEDIUM", pMedium[0])
-                            .and("COMMRESTRICTION.STARTDATE", vars.get("$sys.date"), SqlBuilder.LESS_OR_EQUAL())
-                            .and(newWhere()
-                                    .or("COMMRESTRICTION.CONTACT_ID = CONTACT.CONTACTID")
-                                    .or("COMMRESTRICTION.CONTACT_ID", orgContactSubselect));
-        //!SqlBuilder
-        parts.push("case when exists(" + subquery.toString() + ") then '" + pMedium[1] + "' else '' end");
-    })
-
-    return sqlMasking.concatWithSeparator(parts, " ", false);
+        var res = newSelect(group).from("COMMRESTRICTION")
+                    .where("COMMRESTRICTION.CONTACT_ID = CONTACT.CONTACTID")
+
+        var subres = newSelect(group).from("COMMRESTRICTION")
+                    .where("COMMRESTRICTION.CONTACT_ID in ( "+orgContactSubselect.toString()+")")
+                    
+        subselect = mask.concatWithSeparator(["("+res.toString()+")", "("+subres.toString()+")"], ", ", false);
+    }
+    return subselect;
 }
 
 /**
diff --git a/process/Sql_lib/process.js b/process/Sql_lib/process.js
index eecd2a9c83628dd909a5c182d53c53d38963a53b..8c981ecd4db360cd95a00663a447f1ebf3f8be5c 100644
--- a/process/Sql_lib/process.js
+++ b/process/Sql_lib/process.js
@@ -3292,6 +3292,45 @@ SqlMaskingUtils.prototype.getConcatSymbol = function()
     }
 }
 
+
+/**
+*  Returns the group_concat function, which groups <br>
+*  multiple Row Values into one Cell. Note: This function <br>
+*  does not work on Derby<br>
+*
+* @param {String} pField                 <p>
+*                                       Expression that shall be grouped.<br>
+* @param {String} pSeperator             <p>
+*                                       Character that shall be used as Seperator<br>
+* @return {String}                      <p>
+*                                       Returns the field with groupConcat wrapped around<br>
+*/
+SqlMaskingUtils.prototype.getGroupConcat = function(pField, pSeperator) 
+{
+    var group;
+    if(pField == null || pSeperator == null || pField == null && pSeperator == null)
+        throw new Error(translate.withArguments("Field or Seperator were empty function: %0", ["SqlMaskingUtils.prototype.getGroupConcat"]));
+    
+    switch(this.dbType) 
+    {
+        case db.DBTYPE_MARIADB10:
+        case db.DBTYPE_MYSQL4:
+            group = " GROUP_CONCAT("+pField+" SEPARATOR "+pSeperator+")";
+            break;
+        case db.DBTYPE_ORACLE10_CLUSTER:
+        case db.DBTYPE_ORACLE10_THIN:
+        case db.DBTYPE_ORACLE10_OCI:
+        case db.DBTYPE_POSTGRESQL8:
+        case db.DBTYPE_SQLSERVER2000:
+            group = " STRING_AGG("+pField+", "+pSeperator+")";
+            break;
+        case db.DBTYPE_DERBY10:
+            logging.log(translate.withArguments("${SQL_LIB_UNSUPPORTED_DBTYPE} function: %0", ["SqlMaskingUtils.prototype.getGroupConcat"]), logging.ERROR);
+            break;
+    }
+    return group;
+}
+
 /**
 *  Returns the trim function, which removes the<br>
 *  leading and trailing spaces in a string, depending<br>