golang操作mysql-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_44653849/article/details/110475176

博客涉及Golang和MySQL相关内容，Golang是高效的后端开发语言，MySQL是常用数据库，SQL和PL/SQL用于数据库操作，展现了信息技术领域后端开发与数据库结合的应用。

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package main

import (
    _ "./src/github.com/go-sql-driver/mysql"
    "database/sql"
    "fmt"
)
func main() {
    //插入
    db, err := sql.Open("mysql", "golang:fypy3DcP6544p6ei@tcp(122.51.181.214:3306)/golang?charset=utf8")
    checkErr(err)
    stmt, err := db.Prepare("INSERT userinfo SET username=?,departname=?,created=?")
    checkErr(err)
    res, err := stmt.Exec("马保国", "混元形异太极门掌门人", "2020-1-1")
    checkErr(err)
    id, err := res.LastInsertId()
    checkErr(err)
    fmt.Println(id)


    //更新数据
    stmt, err = db.Prepare("update userinfo set username=? where uid=?")
    checkErr(err)
    res, err = stmt.Exec("不讲武德", id)
    checkErr(err)
    affect, err := res.RowsAffected()
    checkErr(err)
    fmt.Println(affect)

    //查询数据
    rows, err := db.Query("SELECT * FROM userinfo")
    checkErr(err)
    for rows.Next() {
        var uid int
        var username string
        var department string
        var created string
        err = rows.Scan(&uid, &username, &department, &created)
        checkErr(err)
        fmt.Println(uid)
        fmt.Println(username)
        fmt.Println(department)
        fmt.Println(created)
    }


    //删除数据
    stmt, err = db.Prepare("delete from userinfo where uid=?")
    checkErr(err)
    res, err = stmt.Exec(id)
    checkErr(err)
    affect, err = res.RowsAffected()
    checkErr(err)
    fmt.Println(affect)
    db.Close()

}
func checkErr(err error) {
    if err != nil {
        panic(err)
    }
}