How to develop a simple schedule reminder system using MySQL and Go language

How to use MySQL and Go language to develop a simple schedule reminder system

With the fast pace of modern life and busy work, we often ignore important things and dating. In order to help people better manage time, we can use MySQL and Go language to develop a simple schedule reminder system. This article will introduce how to store schedule information through a MySQL database and write related code using Go language.

1. Database design

First, we need to design a database to store schedule information. We can create a table named "events", containing the following fields:

• id: the unique identifier of the event, using an auto-incrementing primary key
• title: the title of the event
• date: The date of the event, use the DATE type
• time: The time of the event, use the TIME type
• description: The description of the event

can be used The following SQL statement creates this table:

CREATE TABLE events (
    id INT AUTO_INCREMENT PRIMARY KEY,
    title VARCHAR(255) NOT NULL,
    date DATE NOT NULL,
    time TIME NOT NULL,
    description TEXT
);

2. Go language code example

Next, we use Go language to write code to connect to the MySQL database and implement related functions. First, we need to import the necessary packages:

package main

import (
    "database/sql"
    "fmt"
    "log"

    _ "github.com/go-sql-driver/mysql"
)

Then, we define an event structure to store the event information retrieved from the database:

type Event struct {
    ID          int
    Title       string
    Date        string
    Time        string
    Description string
}

Next, we write a function to retrieve the event information from the database Get all events in the database:

func getEvents(db *sql.DB) ([]Event, error) {
    rows, err := db.Query("SELECT * FROM events")
    if err != nil {
        return nil, err
    }
    defer rows.Close()

    var events []Event
    for rows.Next() {
        var event Event
        err := rows.Scan(&event.ID, &event.Title, &event.Date, &event.Time, &event.Description)
        if err != nil {
            return nil, err
        }
        events = append(events, event)
    }
    if err = rows.Err(); err != nil {
        return nil, err
    }

    return events, nil
}

Next, we write a function to create new events:

func createEvent(db *sql.DB, event Event) (int64, error) {
    stmt, err := db.Prepare("INSERT INTO events (title, date, time, description) VALUES (?, ?, ?, ?)")
    if err != nil {
        return -1, err
    }
    defer stmt.Close()

    result, err := stmt.Exec(event.Title, event.Date, event.Time, event.Description)
    if err != nil {
        return -1, err
    }

    id, err := result.LastInsertId()
    if err != nil {
        return -1, err
    }

    return id, nil
}

Finally, we write a main function to test these functions:

func main() {
    db, err := sql.Open("mysql", "user:password@tcp(localhost:3306)/database")
    if err != nil {
        log.Fatal(err)
    }
    defer db.Close()

    events, err := getEvents(db)
    if err != nil {
        log.Fatal(err)
    }

    for _, event := range events {
        fmt.Println(event.Title, event.Date, event.Time, event.Description)
    }

    event := Event{
        Title:       "Meeting",
        Date:        "2021-01-01",
        Time:        "10:00:00",
        Description: "Important meeting with clients",
    }

    id, err := createEvent(db, event)
    if err != nil {
        log.Fatal(err)
    }

    fmt.Println("Created event with ID:", id)
}

The above is a code example for developing a simple schedule reminder system using MySQL and Go language. Through this system, we can easily store and retrieve schedule information and create new events. You can further develop and optimize according to actual needs. Hope this article is helpful to you!

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