Diskda saqlanadigan fayllar katologi

Malumotlar bazasi
SELECT * FROM talaba WHERE Yoshi BETWEEN 16 AND 24;
a) Yoshi 16 yoki 24 bo’lgan talabalarni
b) Yoshi 16 ga teng bo’lgan 24 ta talabani;
c) Yoshi 16 dan kichik bo’lmagan va 24 dan kata bo’lmagan talabalarni
d) Yoshi 16 dan kata va 24 dan kichik bo’lgan talabalarni;
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Hozirgi kunda SQL qanday standart til hisoblanadi
a) MBBT
b) RMBBT
c) BB
d) MB
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O’zgartirish so’rovlarining nechta turi mavjud.
a) 5
b) 4
c) 3
d) 2
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CROSS JOIN operatoriga tariff bering
a) Tabiiy tushuntirishda, chap va o’ng jadvallarni bir xil ustun ismlari bo’yicha
ulanadi,natijaviy jadvalga bir xil ismlar bir marta kiradi
b) Predikat orqali tutashtirishda ,chap va ong jadvallar korsatilgan predict yordamida
ulanadi
c) Ustunlar nomi boyicha tutashadi
d) O’zaro kesishilgan ulanish bo’yicha tutashadi.bu tutashtirishda natijaviy jadval manba
jadvallarni dekart ko’paytmasiga teng bo’ladi
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Ierarxik model qanday parametrlar bilan tavsiflanadi
a) Jadval, to’plam, ustun