var_type: string

'$this->idEntityNN=0 in SysRelationshipNN->__construct'

$idEntity1
var_type: string

'65'

$idEntity2
var_type: string

'55'

$SQL

            SELECT
                idEntityChild
            FROM
                sysrelationship
            WHERE
                idEntityParent=65
                AND idEntityChild IN (
                    SELECT
                        idEntityChild
                    FROM
                        sysrelationship
                    WHERE
                        idEntityParent=55
                )