第十章 Go Mysql
准备好mysql数据库服务端数据。
创建test数据库 MariaDB [(none)]> create database test; Query OK, 1 row affected (0.04 sec) MariaDB [(none)]> use test; Database changed
准备好数据表 person
MariaDB [test]> CREATE TABLE `person` ( -> `user_id` int(11) NOT NULL AUTO_INCREMENT, -> `username` varchar(260) DEFAULT NULL, -> `sex` varchar(260) DEFAULT NULL, -> `email` varchar(260) DEFAULT NULL, -> PRIMARY KEY (`user_id`) -> ) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8; Query OK, 0 rows affected (0.09 sec)
准备好place表
CREATE TABLE place ( country varchar(200), city varchar(200), telcode int )ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
查看表结构
MariaDB [test]> desc person; +----------+--------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +----------+--------------+------+-----+---------+----------------+ | user_id | int(11) | NO | PRI | NULL | auto_increment | | username | varchar(260) | YES | | NULL | | | sex | varchar(260) | YES | | NULL | | | email | varchar(260) | YES | | NULL | | +----------+--------------+------+-----+---------+----------------+ 4 rows in set (0.05 sec) MariaDB [test]> desc place; +---------+--------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +---------+--------------+------+-----+---------+-------+ | country | varchar(200) | YES | | NULL | | | city | varchar(200) | YES | | NULL | | | telcode | int(11) | YES | | NULL | | +---------+--------------+------+-----+---------+-------+ 3 rows in set (0.00 sec)
1.1. mysql驱动
mysql使用 使用第三方开源的mysql库: github.com/go-sql-driver/mysql (mysql驱动)github.com/jmoiron/sqlx (基于mysql驱动的封装)
命令行输入 :
go get github.com/go-sql-driver/mysql go get github.com/jmoiron/sqlx
1.2. go-mysql增删改查
插入数据
package main import ( "fmt" _ "github.com/go-sql-driver/mysql" "github.com/jmoiron/sqlx" ) type Person struct { UserId int `db:"user_id"` Username string `db:"username"` Sex string `db:"sex"` Email string `db:"email"` } type Place struct { Country string `db:"country"` City string `db:"city"` TelCode int `db:"telcode"` } var Db *sqlx.DB func init() { database, err := sqlx.Open("mysql", "root:[email protected](123.206.16.61:3306)/test") if err != nil { fmt.Println("open mysql failed,", err) return } Db = database } func main() { r, err := Db.Exec("insert into person(username, sex, email)values(?, ?, ?)", "stu001", "man", "[email protected]") if err != nil { fmt.Println("exec failed, ", err) return } id, err := r.LastInsertId() if err != nil { fmt.Println("exec failed, ", err) return } fmt.Println("insert succ:", id) }
查询数据
package main import ( "fmt" _ "github.com/go-sql-driver/mysql" "github.com/jmoiron/sqlx" ) type Person struct { UserId int `db:"user_id"` Username string `db:"username"` Sex string `db:"sex"` Email string `db:"email"` } type Place struct { Country string `db:"country"` City string `db:"city"` TelCode int `db:"telcode"` } var Db *sqlx.DB func init() { database, err := sqlx.Open("mysql", "root:[email protected](123.206.16.61:3306)/test") if err != nil { fmt.Println("open mysql failed,", err) return } Db = database } func main() { var person []Person err := Db.Select(&person, "select user_id, username, sex, email from person where user_id=?", 1) if err != nil { fmt.Println("exec failed, ", err) return } fmt.Println("select succ:", person) }
更新数据
package main import ( "fmt" _ "github.com/go-sql-driver/mysql" "github.com/jmoiron/sqlx" ) type Person struct { UserId int `db:"user_id"` Username string `db:"username"` Sex string `db:"sex"` Email string `db:"email"` } type Place struct { Country string `db:"country"` City string `db:"city"` TelCode int `db:"telcode"` } var Db *sqlx.DB func init() { database, err := sqlx.Open("mysql", "root:[email protected](123.206.16.61:3306)/test") if err != nil { fmt.Println("open mysql failed,", err) return } Db = database } func main() { res, err := Db.Exec("update person set username=? where user_id=?", "stu0003", 1) if err != nil { fmt.Println("exec failed, ", err) return } row, err := res.RowsAffected() if err != nil { fmt.Println("rows failed, ",err) } fmt.Println("update succ:",row) }
删除数据
package main import ( "fmt" _ "github.com/go-sql-driver/mysql" "github.com/jmoiron/sqlx" ) type Person struct { UserId int `db:"user_id"` Username string `db:"username"` Sex string `db:"sex"` Email string `db:"email"` } type Place struct { Country string `db:"country"` City string `db:"city"` TelCode int `db:"telcode"` } var Db *sqlx.DB func init() { database, err := sqlx.Open("mysql", "root:[email protected](123.206.16.61:3306)/test") if err != nil { fmt.Println("open mysql failed,", err) return } Db = database } func main() { /* _, err := Db.Exec("delete from person where user_id=?", 1) if err != nil { fmt.Println("exec failed, ", err) return } */ res, err := Db.Exec("delete from person where user_id=?", 1) if err != nil { fmt.Println("exec failed, ", err) return } row, err := res.RowsAffected() if err != nil { fmt.Println("rows failed, ", err) } fmt.Println("delete succ: ", row) }
1.3. mysql事务
mysql事务特性:
1) 原子性 2) 一致性 3) 隔离性 4) 持久性
golang MySQL事务应用:
1) import (“github.com/jmoiron/sqlx") 2) Db.Begin() 开始事务 3) Db.Submit() 提交事务 4) Db.Rollback() 回滚事务
原文地址:https://www.cnblogs.com/open-yang/p/11256940.html
时间: 2024-10-11 10:40:20