（三）go-sql-driver

目录

• 1. go-sql-driver/mysql
• 2. CRUD 示例

1. go-sql-driver/mysql

• https://github.com/go-sql-driver/mysql
• http://go-database-sql.org/

2. CRUD 示例

// mysql_demo project main.go
package main

import (
	"database/sql"
	"fmt"

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

func MysqlTest() {
	db, err := sql.Open("mysql", "root:123456@tcp(127.0.0.1:3306)/ld")
	if err != nil {
		fmt.Println("connect to mysql failed!")
		return
	} else {
		fmt.Println("connected")
	}
	defer db.Close()

	err = db.Ping()
	if err != nil {
		panic(err.Error())
	}

	// select
	sqlSelect := "select * from ld.pet"
	statement, err := db.Prepare(sqlSelect)
	if err != nil {
		fmt.Println("prepare statement failed:", err.Error())
		return
	}
	defer statement.Close()
	rows, err := statement.Query()
	if err != nil {
		fmt.Println("query failed:", err.Error())
	}
	columns, err := rows.Columns()
	if err != nil {
		fmt.Println(err.Error())
		return
	}
	fmt.Println(columns)

	row := make([]sql.RawBytes, len(columns))
	scanArgs := make([]interface{}, len(row))
	for i := range row {
		scanArgs[i] = &row[i]
	}

	for rows.Next() {
		err := rows.Scan(scanArgs...)
		if err != nil {
			panic(err.Error())
		}
		// row
		for pos, col := range row {
			fmt.Println(columns[pos], ":", string(col))
		}
		fmt.Println()
	}

	// insert
	sqlInsert := "insert into ld.pet values('kk', 'ld', \"2018-12-13\", \"2018-12-13 15:56:50\", \"2018-12-13 15:57:00\")"
	statement_insert, err := db.Prepare(sqlInsert)
	if err != nil {
		panic(err.Error())
	}
	statement_insert.Exec()
	statement_insert.Close()

	// delete
	sqlDelete := "delete from ld.pet where name = 'kk'"
	statement_delete, err := db.Prepare(sqlDelete)
	if err != nil {
		panic(err.Error())
	}
	statement_delete.Exec()
	statement_delete.Close()

	// update
	sqlUpdate := "update ld.pet set ower = 'caicai' where name = 'gg'"
	statement_update, err := db.Prepare(sqlUpdate)
	if err != nil {
		panic(err.Error())
	}
	statement_update.Exec()
	statement_update.Close()

}

func main() {
	fmt.Println("Hello World!")
	MysqlTest()
}