sql_advanced/lab2-12/tasks.sql

MySQL optimization techniques exercise

Дано база даних, у якій є три таблиці: Orders, Products, Activity ( Див.: https://drive.google.com/open?id=18CZPLaV2MaEeMRwURw6cqFKK9MY-wSPx&usp=drive_fs )
Потрібно оптимізувати декілька запитів

Передумови:
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1. Створіть, якщо не створоно базу даних Lucky_Shrub
CREATE DATABASE IF NOT EXISTS Lucky_Shrub;
--------------------------------------------------
2. Оберіть базу даних Lucky_Shrub

USE Lucky_Shrub;
--------------------------------------------------
3. Створіть таблиці бази даних, якщо не створено 3.1 таблцю Orders

CREATE TABLE IF NOT EXISTS Orders (
    OrderID INT NOT NULL PRIMARY KEY,
    ClientID VARCHAR(10),
    ProductID VARCHAR(10),
    Quantity INT,
    Cost DECIMAL(6, 2),
    Date DATE
);
--------------------------------------------------
3.2 Таблицю Products

CREATE TABLE IF NOT EXISTS Products (
    ProductID VARCHAR(10),
    ProductName VARCHAR(100),
    BuyPrice DECIMAL(6, 2),
    SellPrice DECIMAL(6, 2),
    NumberOfItems INT
);
--------------------------------------------------
3.3 Таблицю Activity

CREATE TABLE IF NOT EXISTS Activity (
    ActivityID INT PRIMARY KEY,
    Properties JSON
);
--------------------------------------------------
4. Заповніть таблиці даними (за потреби оновіть) 4.1 таблцю Orders

INSERT INTO
    Orders (
        OrderID,
        ClientID,
        ProductID,
        Quantity,
        Cost,
        Date
    )
VALUES (
        1,
        "Cl1",
        "P1",
        10,
        500,
        "2020-09-01"
    ),
    (
        2,
        "Cl2",
        "P2",
        5,
        100,
        "2020-09-05"
    ),
    (
        3,
        "Cl3",
        "P3",
        20,
        800,
        "2020-09-03"
    ),
    (
        4,
        "Cl4",
        "P4",
        15,
        150,
        "2020-09-07"
    ),
    (
        5,
        "Cl3",
        "P3",
        10,
        450,
        "2020-09-08"
    ),
    (
        6,
        "Cl2",
        "P2",
        5,
        800,
        "2020-09-09"
    ),
    (
        7,
        "Cl1",
        "P4",
        22,
        1200,
        "2020-09-10"
    ),
    (
        8,
        "Cl3",
        "P1",
        15,
        150,
        "2020-09-10"
    ),
    (
        9,
        "Cl1",
        "P1",
        10,
        500,
        "2020-09-12"
    ),
    (
        10,
        "Cl2",
        "P2",
        5,
        100,
        "2020-09-13"
    ),
    (
        11,
        "Cl4",
        "P5",
        5,
        100,
        "2020-09-15"
    ),
    (
        12,
        "Cl1",
        "P1",
        10,
        500,
        "2022-09-01"
    ),
    (
        13,
        "Cl2",
        "P2",
        5,
        100,
        "2022-09-05"
    ),
    (
        14,
        "Cl3",
        "P3",
        20,
        800,
        "2022-09-03"
    ),
    (
        15,
        "Cl4",
        "P4",
        15,
        150,
        "2022-09-07"
    ),
    (
        16,
        "Cl3",
        "P3",
        10,
        450,
        "2022-09-08"
    ),
    (
        17,
        "Cl2",
        "P2",
        5,
        800,
        "2022-09-09"
    ),
    (
        18,
        "Cl1",
        "P4",
        22,
        1200,
        "2022-09-10"
    ),
    (
        19,
        "Cl3",
        "P1",
        15,
        150,
        "2022-09-10"
    ),
    (
        20,
        "Cl1",
        "P1",
        10,
        500,
        "2022-09-12"
    ),
    (
        21,
        "Cl2",
        "P2",
        5,
        100,
        "2022-09-13"
    ),
    (
        22,
        "Cl2",
        "P1",
        10,
        500,
        "2021-09-01"
    ),
    (
        23,
        "Cl2",
        "P2",
        5,
        100,
        "2021-09-05"
    ),
    (
        24,
        "Cl3",
        "P3",
        20,
        800,
        "2021-09-03"
    ),
    (
        25,
        "Cl4",
        "P4",
        15,
        150,
        "2021-09-07"
    ),
    (
        26,
        "Cl1",
        "P3",
        10,
        450,
        "2021-09-08"
    ),
    (
        27,
        "Cl2",
        "P1",
        20,
        1000,
        "2022-09-01"
    ),
    (
        28,
        "Cl2",
        "P2",
        10,
        200,
        "2022-09-05"
    ),
    (
        29,
        "Cl3",
        "P3",
        20,
        800,
        "2021-09-03"
    );
--------------------------------------------------
4.2 таблицію Products

INSERT INTO
    Products (
        ProductID,
        ProductName,
        BuyPrice,
        SellPrice,
        NumberOfItems
    )
VALUES (
        "P1",
        "Artificial grass bags ",
        40,
        50,
        100
    ),
    (
        "P2",
        "Wood panels",
        15,
        20,
        250
    ),
    (
        "P6",
        "Water fountain",
        65,
        80,
        15
    );

(
    "P3",
    "Patio slates",
    35,
    40,
    60
),
(
    "P4",
    "Sycamore trees ",
    7,
    10,
    50
),
(
    "P5",
    "Trees and Shrubs",
    35,
    50,
    75
),
--------------------------------------------------
4.3 Таблицю Activity

INSERT INTO
    Activity (ActivityID, Properties)
VALUES (
        1,
        '{ "ClientID": "Cl1", "ProductID": "P1", "Order": "True" }'
    ),
    (
        2,
        '{ "ClientID": "Cl2", "ProductID": "P4", "Order": "False" }'
    ),
    (
        3,
        '{ "ClientID": "Cl5", "ProductID": "P5", "Order": "True" }'
    );
--------------------------------------------------

Цілі: 
Використання загальних табличних виразів 
Використання підготовлених запитів 
Використання даних типу JSON