This is my code but it doesn't work for me
SELECT ABS(DATEDIFF(FECHA, LAG(FECHA) OVER (ORDER BY FECHA))) FROM `Clientes`;
WHERE `Clientes`.`ID`='%ID%'
SELECT ABS(DATEDIFF(FECHA, LAG(FECHA) OVER (ORDER BY FECHA))) FROM `Clientes`;
WHERE `Clientes`.`ID`='%ID%'