SELECT k.no_kamar, t.jns_kamar, t.tarif from kamar k natural
JOIN tarif t
where t.tarif = (SELECT min(t.tarif) from tarif t);
SELECT m.nama, if(m.member = "Ya",
0.1*t.tarif*(tgl_cekout-tgl_cekin), 0) as Discount,
if(m.member = "Ya", 0.9, 1)*t.tarif*(tgl_cekout-tgl_cekin) as
Total
from member m NATURAL JOIN kamar k NATURAL JOIN tarif t NATURAL
JOIN tanggal
WHERE if(m.member = "Ya", 0.1*t.tarif*(tgl_cekout-tgl_cekin), 0)
=
(SELECT MAX(if(m.member = "Ya",
0.1*t.tarif*(tgl_cekout-tgl_cekin), 0)) FROM member m NATURAL JOIN
kamar k NATURAL JOIN tarif t NATURAL JOIN tanggal )
SELECT m.nama, (tgl_cekout-tgl_cekin) as Lama_Menginap,
if(m.member = "Ya", 0.9, 1)*t.tarif*(tgl_cekout-tgl_cekin) as
Total
from member m NATURAL JOIN kamar k NATURAL JOIN tarif t NATURAL
JOIN tanggal
WHERE (tgl_cekout-tgl_cekin) =
(SELECT MAX(tgl_cekout-tgl_cekin) FROM member m NATURAL JOIN
kamar k NATURAL JOIN tarif t NATURAL JOIN tanggal )
