• 139============================================================= COUNT agregat funksiyasining vazifasi
  • #133=========================================================== O’zgartirish so’rovlarining nechta turi mavjud. a) 5




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    #133===========================================================
    O’zgartirish so’rovlarining nechta turi mavjud.
    a) 5
    b) 4
    c) 3
    d) 2
    #134============================================================
    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
    #135=============================================================
    Ierarxik model qanday parametrlar bilan tavsiflanadi
    a) Jadval, to’plam, ustun
    b) Satr, ustun, jadval
    c) Jadval, to’plam
    Malumotlar bazasi
    d) Sath, tugun, bog’lanish
    #136=============================================================
    Ierarxik malumotlar bazasida malumotlar majmui va ular orasidagi bog’lanish quyidagicha
    irlanadi
    a) Jadval;
    b) Jadvallar majmui
    c) Daraxtsimon struktura;
    d) Tarmoq sxema;
    #137============================================================
    Malumotlar bazasini boshqarish tizimi alohida olingan nechta moduldan tashkil topgan
    a) 3
    b) 4
    c) =5= d) 6
    #138============================================================
    Malumotlar bazasini boshqarish tizimi Access ish holatlarining qaysi tugmachasi ob’ektini
    yaratish uchun xizmat qiladi
    a) Konstruktor
    b) Otkrit
    c) Sozdat
    d) Udalit
    #139=============================================================
    COUNT agregat funksiyasining vazifasi?
    a) Ko’rstilgan ustundagi qiymatlar yig’indisi hisoblash
    b) Ustunning o’rtacha qiymatini hisoblash

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    #133=========================================================== O’zgartirish so’rovlarining nechta turi mavjud. a) 5

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