章XゴーのMysql
レディーMySQLデータベースサーバのデータ。
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
レディデータシートの人物
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)
テーブルを配置する準備ができました
CREATE TABLE place ( country varchar(200), city varchar(200), telcode int )ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
ビューのテーブル構造
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ドライバ
サードパーティのオープンソースのMySQLの使用のmysql： github.com/go-sql-driver/mysql （mysqlのドライブ）github.com/jmoiron/sqlx （ベース駆動mysqlのパッケージ）
コマンドライン：
go get github.com/go-sql-driver/mysql go get github.com/jmoiron/sqlx
1.2。行く-mysqlのCRUD
データの挿入
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:redhat@tcp(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) }
クエリデータ
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:redhat@tcp(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) }
データの更新
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:redhat@tcp(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) }
データを削除します。
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:redhat@tcp(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の総務
MySQLのトランザクション特性：
1) 原子性 2) 一致性 3) 隔离性 4) 持久性
golang MySQLのトランザクションアプリケーション：
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