Ishdan maqsad: Agregat funksiyailardan foydalanish bo`yicha ko`nikmaga ega bo`lish. Masalani qo`yilishi



Download 19,34 Kb.
Sana26.10.2019
Hajmi19,34 Kb.
#24355
Bog'liq
11-lab
Ички мехнат тартиби коидалари, 10-sinf Algebra, 10-sinf Algebra, 10-sinf-fizika-namuna, 10-sinf-fizika-namuna, 2015-mamadaliyev-tppdo-rus, Davlatlarning pul birlikva poytaxtlari, Davlatlarning pul birlikva poytaxtlari, QR kod(Adabiyot Majmua Ishchi dastur), сиртки ОМ(1), fuqarolik m. ish, fazoda tekislik tenglamalari (1), Writing examples 11 - 15, 1606
1.Laboratoriya ishi

Mavzu: Agregat funksiyalardan foydalanib so’rovlar yaratish.

Ishdan maqsad: Agregat funksiyailardan foydalanish bo`yicha ko`nikmaga ega bo`lish.

Masalani qo`yilishi: Berilgan predmet soha ma`lumotlar bazasidagi barcha ob`yektlarni ustida agregat funksiyalardan foydalanib amallarini bajarish.

Uslubiy ko`rsatmalar: oldingi darsda siz ma'lumotlar bilan ishlashga imkon beradigan bir qator foydali MySQL funktsiyalari haqida ma'lumotga ega bo'lishingiz mumkin. Ushbu darsda yana bir funktsiyalar to'plami ko'rib chiqiladi - ular agregat funksiyalari deyiladi: COUNT, SUM, MIN, MAX va AVG.

SQL agregat funksiyalari ustunlik qiymatlariga bitta natija qiymatini olish uchun qo'llaniladi. Sodda qilib aytganda, ushbu funktsiyalardan foydalanib, ustun qiymatlari to'plamidan bitta qiymatni olamiz. Bu bo'lishi mumkin: barcha qiymatlarning yig'indisi, minimal, maksimal yoki o'rtacha qiymat, shuningdek jadvalning qatorlarini hisoblash.


mysql> CREATE DATABASE AGREGAT;

Query OK, 1 row affected (0.14 sec)

mysql> USE AGREGAT;

Database changed

mysql> CREATE TABLE Products

(

Id INT AUTO_INCREMENT PRIMARY KEY,

ProductName VARCHAR(30) NOT NULL,

Manufacturer VARCHAR(20) NOT NULL,

ProductCount INT DEFAULT 0,

Price DECIMAL NOT NULL

);

Query OK, 0 rows affected (0.46 sec)

mysql>

mysql> INSERT INTO Products(ProductName, Manufacturer, ProductCount, Price)

VALUES

('iPhone X', 'Apple', 3, 76000),

('iPhone 8', 'Apple', 2, 51000),

('iPhone 7', 'Apple', 5, 32000),

('Galaxy S9', 'Samsung', 2, 56000),

('Galaxy S8', 'Samsung', 1, 46000),

('Honor 10', 'Huawei', 5, 28000),

('Nokia 8', 'HMD Global', 6, 38000);

Query OK, 7 rows affected (0.17 sec)

Records: 7 Duplicates: 0 Warnings: 0

mysql> SELECT * FROM PRODUCTS;

+----+-------------+--------------+--------------+-------+

| Id | ProductName | Manufacturer | ProductCount | Price |

+----+-------------+--------------+--------------+-------+

| 1 | iPhone X | Apple | 3 | 76000 |

| 2 | iPhone 8 | Apple | 2 | 51000 |

| 3 | iPhone 7 | Apple | 5 | 32000 |

| 4 | Galaxy S9 | Samsung | 2 | 56000 |

| 5 | Galaxy S8 | Samsung | 1 | 46000 |

| 6 | Honor 10 | Huawei | 5 | 28000 |

| 7 | Nokia 8 | HMD Global | 6 | 38000 |

+----+-------------+--------------+--------------+-------+

7 rows in set (0.00 sec)

mysql> SELECT AVG(Price) AS Average_Price FROM Products;

+---------------+

| Average_Price |

+---------------+

| 46714.2857 |

+---------------+

1 row in set (0.10 sec)

mysql> SELECT AVG(Price) FROM Products

WHERE Manufacturer='Apple';

+------------+

| AVG(Price) |

+------------+

| 53000.0000 |

+------------+

1 row in set (0.00 sec)

mysql> SELECT AVG(Price * ProductCount) FROM Products

;

+---------------------------+

| AVG(Price * ProductCount) |

+---------------------------+

| 145142.8571 |

+---------------------------+

1 row in set (0.00 sec)

mysql> SELECT AVG(Price * ProductCount) AS JAMI FROM Products

;

+-------------+

| JAMI |

+-------------+

| 145142.8571 |

+-------------+

1 row in set (0.00 sec)

mysql>

mysql> SELECT COUNT(*) FROM Products;

+----------+

| COUNT(*) |

+----------+

| 7 |

+----------+

1 row in set (0.13 sec)

mysql>



mysql> SELECT COUNT(Manufacturer) FROM Products;

+---------------------+

| COUNT(Manufacturer) |

+---------------------+

| 7 |

+---------------------+

1 row in set (0.00 sec)

mysql> SELECT MIN(Price), MAX(Price) FROM Products;

+------------+------------+

| MIN(Price) | MAX(Price) |

+------------+------------+

| 28000 | 76000 |

+------------+------------+

1 row in set (0.05 sec)

mysql> SELECT SUM(ProductCount) FROM Products;

+-------------------+

| SUM(ProductCount) |

+-------------------+

| 24 |

+-------------------+

1 row in set (0.00 sec)

mysql> SELECT SUM(ProductCount * Price) FROM Products

;

+---------------------------+

| SUM(ProductCount * Price) |

+---------------------------+

| 1016000 |

+---------------------------+

1 row in set (0.00 sec)

mysql> SELECT COUNT(DISTINCT Manufacturer) FROM Products;

+------------------------------+

| COUNT(DISTINCT Manufacturer) |

+------------------------------+

| 4 |

+------------------------------+

1 row in set (0.05 sec)

mysql> SELECT COUNT(ALL Manufacturer) FROM Products;

+-------------------------+

| COUNT(ALL Manufacturer) |

+-------------------------+

| 7 |

+-------------------------+

1 row in set (0.00 sec)

mysql> SELECT COUNT(*) AS ProdCount,

SUM(ProductCount) AS TotalCount,

MIN(Price) AS MinPrice,

MAX(Price) AS MaxPrice,

AVG(Price) AS AvgPrice

FROM Products;

+-----------+------------+----------+----------+------------+

| ProdCount | TotalCount | MinPrice | MaxPrice | AvgPrice |

+-----------+------------+----------+----------+------------+

| 7 | 24 | 28000 | 76000 | 46714.2857 |

+-----------+------------+----------+----------+------------+

1 row in set (0.00 sec)

mysql> SELECT GROUP_CONCAT(Price) FROM Products;

+-------------------------------------------+

| GROUP_CONCAT(Price) |

+-------------------------------------------+

| 76000,51000,32000,56000,46000,28000,38000 |

+-------------------------------------------+

1 row in set (0.00 sec)

mysql> SELECT GROUP_CONCAT(PRODUCTNAME) FROM Products;

+-----------------------------------------------------------------+

| GROUP_CONCAT(PRODUCTNAME) |

+-----------------------------------------------------------------+

| iPhone X,iPhone 8,iPhone 7,Galaxy S9,Galaxy S8,Honor 10,Nokia 8 |

+-----------------------------------------------------------------+

1 row in set (0.00 sec)

mysql> SELECT STD(Price) FROM Products;

+--------------------+

| STD(Price) |

+--------------------+

| 15144.204791784552 |

+--------------------+

1 row in set (0.00 sec)

mysql> SELECT STDDEV(Price) FROM Products;

+--------------------+

| STDDEV(Price) |

+--------------------+

| 15144.204791784552 |

+--------------------+

1 row in set (0.00 sec)

mysql> SELECT VAR_POP(Price) FROM Products;

+--------------------+

| VAR_POP(Price) |

+--------------------+

| 229346938.77551016 |

+--------------------+

1 row in set (0.00 sec)

Topshiriq: Har bir talaba o’ziga berilgan predmet soha mavzusi bo’yicha AVG,SUM, MIN, MAX, GROUP_CONCAT operatoridan foydalanib so’rovlar yaratishi va natijasi bilan ko’rsatib o’tishi kerak.
Download 19,34 Kb.

Do'stlaringiz bilan baham:




Ma'lumotlar bazasi mualliflik huquqi bilan himoyalangan ©hozir.org 2022
ma'muriyatiga murojaat qiling

    Bosh sahifa
davlat universiteti
ta’lim vazirligi
axborot texnologiyalari
maxsus ta’lim
zbekiston respublikasi
guruh talabasi
O’zbekiston respublikasi
nomidagi toshkent
o’rta maxsus
davlat pedagogika
texnologiyalari universiteti
toshkent axborot
xorazmiy nomidagi
rivojlantirish vazirligi
pedagogika instituti
Ўзбекистон республикаси
tashkil etish
haqida tushuncha
таълим вазирлиги
vazirligi muhammad
O'zbekiston respublikasi
toshkent davlat
махсус таълим
respublikasi axborot
kommunikatsiyalarini rivojlantirish
vazirligi toshkent
saqlash vazirligi
fanidan tayyorlagan
bilan ishlash
Toshkent davlat
sog'liqni saqlash
uzbekistan coronavirus
respublikasi sog'liqni
coronavirus covid
koronavirus covid
vazirligi koronavirus
qarshi emlanganlik
covid vaccination
risida sertifikat
sertifikat ministry
vaccination certificate
Ishdan maqsad
fanidan mustaqil
matematika fakulteti
o’rta ta’lim
haqida umumiy
fanlar fakulteti
pedagogika universiteti
ishlab chiqarish
moliya instituti
fanining predmeti