getJoiningQRCodeByJoinCode
@Query(value = ""SELECT * FROM " + JOINING_QRCODES_TABLE + " WHERE " + JOIN_CODE_KEY + "=:" + JOIN_CODE_KEY", nativeQuery = true)
Method to execute the query to select a JoiningQRCode by its textual join code
Return
the selected qrcode as JoiningQRCode
Parameters
joinCode
: the textual join code of the qrcode to get