*/
private SelectStatement getSelectAidByOrganisationsId() {
SelectStatement stmt = sqlFactory.newSelectStatement();
stmt.setTable(kettenElement);
SelectTableReference kettenElementRef = stmt.getSelectTableReference();
JoinReference vertreterKetteRef = kettenElementRef.join(vertreterKette);
addEQ(kettenElementRef, vertreterKetteRef, vertreterKetteRef.getOn(),
kettenElement.getColumn("aId"),
vertreterKette.getColumn("wurzelElement"));
addEQ(kettenElementRef, stmt.getWhere(), kettenElement.getColumn("organisationsId"));
stmt.addResultColumn(kettenElementRef.newColumnReference(kettenElement.getColumn("aId")));