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3.5.1-mysql3.go
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3.5.1-mysql3.go
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//++++++++++++++++++++++++++++++++++++++++
// 《Go语言高级开发与实战》源码
//++++++++++++++++++++++++++++++++++++++++
// Author:廖显东(ShirDon)
// Blog:https://www.shirdon.com/
// 知乎:https://www.zhihu.com/people/shirdonl
// 公众号:源码大数据
// 仓库地址:https://gitee.com/shirdonl/goAdvanced
// 仓库地址:https://github.com/shirdonl/goAdvanced
//++++++++++++++++++++++++++++++++++++++++
package main
import (
"database/sql"
"fmt"
_ "github.com/go-sql-driver/mysql"
"log"
)
func main() {
db, err := sql.Open("mysql", "root:a123456@tcp(127.0.0.1:3306)/ch4")
if err != nil {
fmt.Println(err)
}
tx, err := db.Begin()
if err != nil {
log.Fatal(err)
}
var (
id int
phone string
)
//通过defer语句回滚
defer tx.Rollback()
//查询数据库
rows, err := db.Query("select id, phone from user where id = ?", 3)
if err != nil {
log.Fatal(err)
}
//defer语句关闭数据库连接
defer rows.Close()
for rows.Next() {
//通过Scan方法赋值
err := rows.Scan(&id, &phone)
if err != nil {
log.Fatal(err)
}
log.Println(id, phone)
}
err = tx.Commit()
if err != nil {
log.Fatal(err)
}
}