SELECT FIRST 1 CLIENTES.RAZON,
(SELECT SUM(DEPOSITOS.VALOR) FROM DEPOSITOS WHERE DEPOSITOS.ID_CLIENTE = :CLIENTE) AS DEPOSITADO,
(SELECT SUM(RETIROS.VALOR) FROM RETIROS WHERE RETIROS.ID_CLIENTE = :CLIENTE) AS RETIRADO,
(SELECT SUM(DEPOSITOS.VALOR) FROM DEPOSITOS WHERE DEPOSITOS.ID_CLIENTE = :CLIENTE)-
(SELECT SUM(RETIROS.VALOR) FROM RETIROS WHERE RETIROS.ID_CLIENTE = :CLIENTE) AS SALDO
FROM CLIENTES, DEPOSITOS, RETIROS
GROUP BY CLIENTES.RAZON